DataGridViewColumn.cs source code in C# .NET

                        
Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / DataGridViewColumn.cs / 1305376 / DataGridViewColumn.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms 
{ 
    using System;
    using System.Text; 
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Globalization;
    using System.Diagnostics; 
    using System.Diagnostics.CodeAnalysis;
 
    ///  
    /// 
    ///     Base class for the columns in a data grid view. 
    /// 
    [
        Designer("System.Windows.Forms.Design.DataGridViewColumnDesigner, " + AssemblyRef.SystemDesign),
        TypeConverterAttribute(typeof(DataGridViewColumnConverter)), 
        ToolboxItem(false),
        DesignTimeVisible(false) 
    ] 
    public class DataGridViewColumn : DataGridViewBand, IComponent
    { 
        private const float DATAGRIDVIEWCOLUMN_defaultFillWeight = 100F;
        private const int   DATAGRIDVIEWCOLUMN_defaultWidth = 100;
        private const int   DATAGRIDVIEWCOLUMN_defaultMinColumnThickness = 5;
 
        private const byte DATAGRIDVIEWCOLUMN_automaticSort                     = 0x01;
        private const byte DATAGRIDVIEWCOLUMN_programmaticSort                  = 0x02; 
        private const byte DATAGRIDVIEWCOLUMN_isDataBound                       = 0x04; 
        private const byte DATAGRIDVIEWCOLUMN_isBrowsableInternal               = 0x08;
        private const byte DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal    = 0x10; 

        private byte flags;  // see DATAGRIDVIEWCOLUMN_ consts above
        private DataGridViewCell cellTemplate;
        private string name; 
        private int displayIndex;
        private int desiredFillWidth = 0; 
        private int desiredMinimumWidth = 0; 
        private float fillWeight, usedFillWeight;
        private DataGridViewAutoSizeColumnMode autoSizeMode; 
        private int boundColumnIndex = -1;
        private string dataPropertyName = String.Empty;
        private TypeConverter boundColumnConverter = null;
 
        // needed for IComponent
        private ISite site = null; 
        private EventHandler disposed = null; 

        private static readonly int PropDataGridViewColumnValueType = PropertyStore.CreateKey(); 

        /// 
        /// 
        ///     
        ///       Initializes a new instance of the  class.
        ///     
        ///  
        public DataGridViewColumn() : this((DataGridViewCell) null)
        { 
        }

        /// 
        public DataGridViewColumn(DataGridViewCell cellTemplate) : base() 
        {
            this.fillWeight = DATAGRIDVIEWCOLUMN_defaultFillWeight; 
            this.usedFillWeight = DATAGRIDVIEWCOLUMN_defaultFillWeight; 
            this.Thickness = DATAGRIDVIEWCOLUMN_defaultWidth;
            this.MinimumThickness = DATAGRIDVIEWCOLUMN_defaultMinColumnThickness; 
            this.name = String.Empty;
            this.bandIsRow = false;
            this.displayIndex = -1;
            this.cellTemplate = cellTemplate; 
            this.autoSizeMode = DataGridViewAutoSizeColumnMode.NotSet;
        } 
 
        /// 
        [ 
            SRCategory(SR.CatLayout),
            DefaultValue(DataGridViewAutoSizeColumnMode.NotSet),
            SRDescription(SR.DataGridViewColumn_AutoSizeModeDescr),
            RefreshProperties(RefreshProperties.Repaint) 
        ]
        public DataGridViewAutoSizeColumnMode AutoSizeMode 
        { 
            get
            { 
                return this.autoSizeMode;
            }
            set
            { 
               switch (value)
               { 
                   case DataGridViewAutoSizeColumnMode.NotSet: 
                   case DataGridViewAutoSizeColumnMode.None:
                   case DataGridViewAutoSizeColumnMode.ColumnHeader: 
                   case DataGridViewAutoSizeColumnMode.AllCellsExceptHeader:
                   case DataGridViewAutoSizeColumnMode.AllCells:
                   case DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader:
                   case DataGridViewAutoSizeColumnMode.DisplayedCells: 
                   case DataGridViewAutoSizeColumnMode.Fill:
                       break; 
                   default: 
                       throw new InvalidEnumArgumentException("value", (int)value, typeof(DataGridViewAutoSizeColumnMode));
                } 
                if (this.autoSizeMode != value)
                {
                    if (this.Visible && this.DataGridView != null)
                    { 
                        if (!this.DataGridView.ColumnHeadersVisible &&
                            (value == DataGridViewAutoSizeColumnMode.ColumnHeader || 
                             (value == DataGridViewAutoSizeColumnMode.NotSet && this.DataGridView.AutoSizeColumnsMode == DataGridViewAutoSizeColumnsMode.ColumnHeader))) 
                        {
                            throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_AutoSizeCriteriaCannotUseInvisibleHeaders)); 
                        }
                        if (this.Frozen &&
                            (value == DataGridViewAutoSizeColumnMode.Fill ||
                             (value == DataGridViewAutoSizeColumnMode.NotSet && this.DataGridView.AutoSizeColumnsMode == DataGridViewAutoSizeColumnsMode.Fill))) 
                        {
                            // Cannot set the inherited auto size mode to Fill when the column is frozen 
                            throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_FrozenColumnCannotAutoFill)); 
                        }
                    } 
                    DataGridViewAutoSizeColumnMode previousInheritedMode = this.InheritedAutoSizeMode;
                    bool previousInheritedModeAutoSized = previousInheritedMode != DataGridViewAutoSizeColumnMode.Fill &&
                                                          previousInheritedMode != DataGridViewAutoSizeColumnMode.None &&
                                                          previousInheritedMode != DataGridViewAutoSizeColumnMode.NotSet; 
                    this.autoSizeMode = value;
                    if (this.DataGridView == null) 
                    { 
                        if (this.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.Fill &&
                            this.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.None && 
                            this.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.NotSet)
                        {
                            if (!previousInheritedModeAutoSized)
                            { 
                                // Save current column width for later reuse
                                this.CachedThickness = this.Thickness; 
                            } 
                        }
                        else 
                        {
                            if (this.Thickness != this.CachedThickness && previousInheritedModeAutoSized)
                            {
                                // Restoring cached column width 
                                this.ThicknessInternal = this.CachedThickness;
                            } 
                        } 
                    }
                    else 
                    {
                        this.DataGridView.OnAutoSizeColumnModeChanged(this, previousInheritedMode);
                    }
                } 
            }
        } 
 
        // TypeConverter of the PropertyDescriptor attached to this column
        // in databound cases. Null otherwise. 
        internal TypeConverter BoundColumnConverter
        {
            get
            { 
                return this.boundColumnConverter;
            } 
            set 
            {
                this.boundColumnConverter = value; 
            }
        }

        internal int BoundColumnIndex 
        {
            get 
            { 
                return this.boundColumnIndex;
            } 
            set
            {
                this.boundColumnIndex = value;
            } 
        }
 
        ///  
        [
            Browsable(false), 
            EditorBrowsable(EditorBrowsableState.Advanced),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public virtual DataGridViewCell CellTemplate 
        {
            get 
            { 
                return this.cellTemplate;
            } 
            set
            {
                this.cellTemplate = value;
            } 
        }
 
        ///  
        [
            Browsable(false), 
            EditorBrowsable(EditorBrowsableState.Advanced),
        ]
        public Type CellType
        { 
            get
            { 
                if (this.cellTemplate != null) 
                {
                    return this.cellTemplate.GetType(); 
                }
                else
                {
                    return null; 
                }
            } 
        } 

        ///  
        [
            DefaultValue(null),
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ColumnContextMenuStripDescr) 
        ]
        public override ContextMenuStrip ContextMenuStrip 
        { 
            get
            { 
                return base.ContextMenuStrip;
            }
            set
            { 
                base.ContextMenuStrip = value;
            } 
        } 

        ///  
        [
            Browsable(true),
            DefaultValue(""),
            TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, " + AssemblyRef.SystemDesign), 
            Editor("System.Windows.Forms.Design.DataGridViewColumnDataPropertyNameEditor, " + AssemblyRef.SystemDesign, typeof(System.Drawing.Design.UITypeEditor)),
            SRDescription(SR.DataGridView_ColumnDataPropertyNameDescr), 
            SRCategory(SR.CatData) 
        ]
        public string DataPropertyName 
        {
            get
            {
                return this.dataPropertyName; 
            }
            set 
            { 
                if (value == null)
                { 
                    value = String.Empty;
                }
                if (value != this.dataPropertyName)
                { 
                    this.dataPropertyName = value;
                    if (this.DataGridView != null) 
                    { 
                        this.DataGridView.OnColumnDataPropertyNameChanged(this);
                    } 
                }
            }
        }
 
        /// 
        [ 
            Browsable(true), 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnDefaultCellStyleDescr) 
        ]
        public override DataGridViewCellStyle DefaultCellStyle
        {
            get 
            {
                return base.DefaultCellStyle; 
            } 
            set
            { 
                base.DefaultCellStyle = value;
            }
        }
 
        private bool ShouldSerializeDefaultCellStyle()
        { 
 
            if (!this.HasDefaultCellStyle)
            { 
                return false;
            }

            DataGridViewCellStyle defaultCellStyle = this.DefaultCellStyle; 

            return (!defaultCellStyle.BackColor.IsEmpty || 
                    !defaultCellStyle.ForeColor.IsEmpty || 
                    !defaultCellStyle.SelectionBackColor.IsEmpty ||
                    !defaultCellStyle.SelectionForeColor.IsEmpty || 
                    defaultCellStyle.Font != null ||
                    !defaultCellStyle.IsNullValueDefault ||
                    !defaultCellStyle.IsDataSourceNullValueDefault ||
                    !String.IsNullOrEmpty(defaultCellStyle.Format) || 
                    !defaultCellStyle.FormatProvider.Equals(System.Globalization.CultureInfo.CurrentCulture) ||
                    defaultCellStyle.Alignment != DataGridViewContentAlignment.NotSet || 
                    defaultCellStyle.WrapMode != DataGridViewTriState.NotSet || 
                    defaultCellStyle.Tag !=  null ||
                    !defaultCellStyle.Padding.Equals(Padding.Empty)); 
        }

        internal int DesiredFillWidth
        { 
            get
            { 
                return this.desiredFillWidth; 
            }
            set 
            {
                this.desiredFillWidth = value;
            }
        } 

        internal int DesiredMinimumWidth 
        { 
            get
            { 
                return this.desiredMinimumWidth;
            }
            set
            { 
                this.desiredMinimumWidth = value;
            } 
        } 

        ///  
        [
            Browsable(false),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public int DisplayIndex
        { 
            get 
            {
                return this.displayIndex; 
            }
            set
            {
                if (this.displayIndex != value) 
                {
                    if (value == Int32.MaxValue) 
                    { 
                        throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexTooLarge, Int32.MaxValue.ToString(CultureInfo.CurrentCulture)));
                    } 
                    if (this.DataGridView != null)
                    {
                        if (value < 0)
                        { 
                            throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexNegative));
                        } 
                        if (value >= this.DataGridView.Columns.Count) 
                        {
                            throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexExceedsColumnCount)); 
                        }
                        // Will throw an error if a visible frozen column is placed inside a non-frozen area or vice-versa.
                        this.DataGridView.OnColumnDisplayIndexChanging(this, value);
                        this.displayIndex = value; 
                        try
                        { 
                            this.DataGridView.InDisplayIndexAdjustments = true; 
                            this.DataGridView.OnColumnDisplayIndexChanged_PreNotification();
                            this.DataGridView.OnColumnDisplayIndexChanged(this); 
                            this.DataGridView.OnColumnDisplayIndexChanged_PostNotification();
                        }
                        finally
                        { 
                            this.DataGridView.InDisplayIndexAdjustments = false;
                        } 
                    } 
                    else
                    { 
                        if (value < -1)
                        {
                            throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexTooNegative));
                        } 
                        this.displayIndex = value;
                    } 
                } 
            }
        } 

        internal bool DisplayIndexHasChanged
        {
            get 
            {
                return (this.flags & DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal) != 0; 
            } 
            set
            { 
                if (value)
                {
                    this.flags |= (byte) DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal;
                } 
                else
                { 
                    this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal); 
                }
            } 
        }

        internal int DisplayIndexInternal
        { 
            set
            { 
                Debug.Assert(value >= -1); 
                Debug.Assert(value < Int32.MaxValue);
 
                this.displayIndex = value;
            }
        }
 
        /// 
        [ 
            Browsable(false), 
            EditorBrowsable(EditorBrowsableState.Advanced)
        ] 
        public event EventHandler Disposed
        {
            add
            { 
                this.disposed += value;
            } 
            remove 
            {
                this.disposed -= value; 
            }
        }

        ///  
        [
            DefaultValue(0), 
            SRCategory(SR.CatLayout), 
            SRDescription(SR.DataGridView_ColumnDividerWidthDescr)
        ] 
        public int DividerWidth
        {
            get
            { 
                return this.DividerThickness;
            } 
            set 
            {
                this.DividerThickness = value; 
            }
        }

        ///  
        [
            SRCategory(SR.CatLayout), 
            DefaultValue(DATAGRIDVIEWCOLUMN_defaultFillWeight), 
            SRDescription(SR.DataGridViewColumn_FillWeightDescr),
        ] 
        public float FillWeight
        {
            get
            { 
                return this.fillWeight;
            } 
            set 
            {
                if (value <= 0) 
                {
                    throw new ArgumentOutOfRangeException("FillWeight", SR.GetString(SR.InvalidLowBoundArgument, "FillWeight", (value).ToString(CultureInfo.CurrentCulture), (0).ToString(CultureInfo.CurrentCulture)));
                }
                if (value > (float)ushort.MaxValue) 
                {
                    throw new ArgumentOutOfRangeException("FillWeight", SR.GetString(SR.InvalidHighBoundArgumentEx, "FillWeight", (value).ToString(CultureInfo.CurrentCulture), (ushort.MaxValue).ToString(CultureInfo.CurrentCulture))); 
                } 
                if (this.DataGridView != null)
                { 
                    this.DataGridView.OnColumnFillWeightChanging(this, value);
                    this.fillWeight = value;
                    this.DataGridView.OnColumnFillWeightChanged(this);
                } 
                else
                { 
                    this.fillWeight = value; 
                }
            } 
        }

        internal float FillWeightInternal
        { 
            set
            { 
                Debug.Assert(value > 0); 
                this.fillWeight = value;
            } 
        }

        /// 
        [ 
            DefaultValue(false),
            RefreshProperties(RefreshProperties.All), 
            SRCategory(SR.CatLayout), 
            SRDescription(SR.DataGridView_ColumnFrozenDescr)
        ] 
        public override bool Frozen
        {
            get
            { 
                return base.Frozen;
            } 
            set 
            {
                base.Frozen = value; 
            }
        }

        ///  
        [
            Browsable(false), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) 
        ]
        public DataGridViewColumnHeaderCell HeaderCell 
        {
            get
            {
                return (DataGridViewColumnHeaderCell) base.HeaderCellCore; 
            }
            set 
            { 
                base.HeaderCellCore = value;
            } 
        }

        /// 
        [ 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnHeaderTextDescr), 
            Localizable(true) 
        ]
        public string HeaderText 
        {
            get
            {
                if (this.HasHeaderCell) 
                {
                    string headerValue = this.HeaderCell.Value as string; 
                    if (headerValue != null) 
                    {
                        return headerValue; 
                    }
                    else
                    {
                        return string.Empty; 
                    }
                } 
                else 
                {
                    return string.Empty; 
                }
            }
            set
            { 
                if ((value != null || this.HasHeaderCell) &&
                    this.HeaderCell.ValueType != null && 
                    this.HeaderCell.ValueType.IsAssignableFrom(typeof(System.String))) 
                {
                    this.HeaderCell.Value = value; 
                }
            }
        }
 
        private bool ShouldSerializeHeaderText()
        { 
            return this.HasHeaderCell && ((DataGridViewColumnHeaderCell) this.HeaderCell).ContainsLocalValue; 
        }
 
        /// 
        [
            Browsable(false),
            EditorBrowsable(EditorBrowsableState.Advanced), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public DataGridViewAutoSizeColumnMode InheritedAutoSizeMode 
        {
            get 
            {
                return GetInheritedAutoSizeMode(this.DataGridView);
            }
        } 

        ///  
        [ 
            Browsable(false)
        ] 
        public override DataGridViewCellStyle InheritedStyle
        {
            get
            { 
                DataGridViewCellStyle columnStyle = null;
                Debug.Assert(this.Index > -1); 
                if (this.HasDefaultCellStyle) 
                {
                    columnStyle = this.DefaultCellStyle; 
                    Debug.Assert(columnStyle != null);
                }

                if (this.DataGridView == null) 
                {
                    return columnStyle; 
                } 

                DataGridViewCellStyle inheritedCellStyleTmp = new DataGridViewCellStyle(); 
                DataGridViewCellStyle dataGridViewStyle = this.DataGridView.DefaultCellStyle;
                Debug.Assert(dataGridViewStyle != null);

                if (columnStyle != null && !columnStyle.BackColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.BackColor = columnStyle.BackColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.BackColor = dataGridViewStyle.BackColor;
                }

                if (columnStyle != null && !columnStyle.ForeColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.ForeColor = columnStyle.ForeColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.ForeColor = dataGridViewStyle.ForeColor;
                }

                if (columnStyle != null && !columnStyle.SelectionBackColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.SelectionBackColor = columnStyle.SelectionBackColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.SelectionBackColor = dataGridViewStyle.SelectionBackColor;
                }

                if (columnStyle != null && !columnStyle.SelectionForeColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.SelectionForeColor = columnStyle.SelectionForeColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.SelectionForeColor = dataGridViewStyle.SelectionForeColor;
                }

                if (columnStyle != null && columnStyle.Font != null) 
                {
                    inheritedCellStyleTmp.Font = columnStyle.Font; 
                } 
                else
                { 
                    inheritedCellStyleTmp.Font = dataGridViewStyle.Font;
                }

                if (columnStyle != null && !columnStyle.IsNullValueDefault) 
                {
                    inheritedCellStyleTmp.NullValue = columnStyle.NullValue; 
                } 
                else
                { 
                    inheritedCellStyleTmp.NullValue = dataGridViewStyle.NullValue;
                }

                if (columnStyle != null && !columnStyle.IsDataSourceNullValueDefault) 
                {
                    inheritedCellStyleTmp.DataSourceNullValue = columnStyle.DataSourceNullValue; 
                } 
                else
                { 
                    inheritedCellStyleTmp.DataSourceNullValue = dataGridViewStyle.DataSourceNullValue;
                }

                if (columnStyle != null && columnStyle.Format.Length != 0) 
                {
                    inheritedCellStyleTmp.Format = columnStyle.Format; 
                } 
                else
                { 
                    inheritedCellStyleTmp.Format = dataGridViewStyle.Format;
                }

                if (columnStyle != null && !columnStyle.IsFormatProviderDefault) 
                {
                    inheritedCellStyleTmp.FormatProvider = columnStyle.FormatProvider; 
                } 
                else
                { 
                    inheritedCellStyleTmp.FormatProvider = dataGridViewStyle.FormatProvider;
                }

                if (columnStyle != null && columnStyle.Alignment != DataGridViewContentAlignment.NotSet) 
                {
                    inheritedCellStyleTmp.AlignmentInternal = columnStyle.Alignment; 
                } 
                else
                { 
                    Debug.Assert(dataGridViewStyle.Alignment != DataGridViewContentAlignment.NotSet);
                    inheritedCellStyleTmp.AlignmentInternal = dataGridViewStyle.Alignment;
                }
 
                if (columnStyle != null && columnStyle.WrapMode != DataGridViewTriState.NotSet)
                { 
                    inheritedCellStyleTmp.WrapModeInternal = columnStyle.WrapMode; 
                }
                else 
                {
                    Debug.Assert(dataGridViewStyle.WrapMode != DataGridViewTriState.NotSet);
                    inheritedCellStyleTmp.WrapModeInternal = dataGridViewStyle.WrapMode;
                } 

                if (columnStyle != null && columnStyle.Tag != null) 
                { 
                    inheritedCellStyleTmp.Tag = columnStyle.Tag;
                } 
                else
                {
                    inheritedCellStyleTmp.Tag = dataGridViewStyle.Tag;
                } 

                if (columnStyle != null && columnStyle.Padding != Padding.Empty) 
                { 
                    inheritedCellStyleTmp.PaddingInternal = columnStyle.Padding;
                } 
                else
                {
                    inheritedCellStyleTmp.PaddingInternal = dataGridViewStyle.Padding;
                } 

                return inheritedCellStyleTmp; 
            } 
        }
 
        internal bool IsBrowsableInternal
        {
            get
            { 
                return (this.flags & DATAGRIDVIEWCOLUMN_isBrowsableInternal) != 0;
            } 
            set 
            {
                if (value) 
                {
                    this.flags |= (byte) DATAGRIDVIEWCOLUMN_isBrowsableInternal;
                }
                else 
                {
                    this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_isBrowsableInternal); 
                } 
            }
        } 

        /// 
        [
            Browsable(false), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public bool IsDataBound 
        {
            get 
            {
                return this.IsDataBoundInternal;
            }
        } 

        internal bool IsDataBoundInternal 
        { 
            get
            { 
                return (this.flags & DATAGRIDVIEWCOLUMN_isDataBound) != 0;
            }
            set
            { 
                if (value)
                { 
                    this.flags |= (byte)DATAGRIDVIEWCOLUMN_isDataBound; 
                }
                else 
                {
                    this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_isDataBound);
                }
            } 
        }
 
        ///  
        [
            DefaultValue(DATAGRIDVIEWCOLUMN_defaultMinColumnThickness), 
            Localizable(true),
            SRCategory(SR.CatLayout),
            SRDescription(SR.DataGridView_ColumnMinimumWidthDescr),
            RefreshProperties(RefreshProperties.Repaint) 
        ]
        public int MinimumWidth 
        { 
            get
            { 
                return this.MinimumThickness;
            }
            set
            { 
                this.MinimumThickness = value;
            } 
        } 

        ///  
        [
            Browsable(false)
        ]
        public string Name 
        {
            get 
            { 
                //
                // Change needed to bring the design time and the runtime "Name" property together. 
                // The ExtenderProvider adds a "Name" property of its own. It does this for all IComponents.
                // The "Name" property added by the ExtenderProvider interacts only w/ the Site property.
                // The Control class' Name property can be changed only thru the "Name" property provided by the
                // Extender Service. 
                //
                // However, the user can change the DataGridView::Name property in the DataGridViewEditColumnDialog. 
                // So while the Control can fall back to Site.Name if the user did not explicitly set Control::Name, 
                // the DataGridViewColumn should always go first to the Site.Name to retrieve the name.
                // 
                // NOTE: one side effect of bringing together the design time and the run time "Name" properties is that DataGridViewColumn::Name changes.
                // However, DataGridView does not fire ColumnNameChanged event.
                // We can't fix this because ISite does not provide Name change notification. So in effect
                // DataGridViewColumn does not know when its name changed. 
                // I talked w/ MarkRi and he is perfectly fine w/ DataGridViewColumn::Name changing w/o ColumnNameChanged
                // being fired. 
                // 
                if (this.Site != null && !String.IsNullOrEmpty(this.Site.Name))
                { 
                    this.name = this.Site.Name;
                }

                return name; 
            }
            set 
            { 
                string oldName = this.name;
                if (String.IsNullOrEmpty(value)) 
                {
                    this.name = string.Empty;
                }
                else 
                {
                    this.name = value; 
                } 

                if (this.DataGridView != null && !string.Equals(this.name, oldName,StringComparison.Ordinal)) 
                {
                    this.DataGridView.OnColumnNameChanged(this);
                }
            } 
        }
 
        ///  
        [
            SRCategory(SR.CatBehavior), 
            SRDescription(SR.DataGridView_ColumnReadOnlyDescr)
        ]
        public override bool ReadOnly
        { 
            get
            { 
                return base.ReadOnly; 
            }
            set 
            {
                if (this.IsDataBound &&
                    this.DataGridView != null &&
                    this.DataGridView.DataConnection != null && 
                    this.boundColumnIndex != -1 &&
                    this.DataGridView.DataConnection.DataFieldIsReadOnly(this.boundColumnIndex) && 
                    !value) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridView_ColumnBoundToAReadOnlyFieldMustRemainReadOnly)); 
                }
                base.ReadOnly = value;
            }
        } 

        ///  
        [ 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ColumnResizableDescr) 
        ]
        public override DataGridViewTriState Resizable
        {
            get 
            {
                return base.Resizable; 
            } 
            set
            { 
                base.Resizable = value;
            }
        }
 
        /// 
        [ 
            Browsable(false), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public ISite Site
        {
            get
            { 
                return this.site;
            } 
            set 
            {
                this.site = value; 
            }
        }

        ///  
        [
            DefaultValue(DataGridViewColumnSortMode.NotSortable), 
            SRCategory(SR.CatBehavior), 
            SRDescription(SR.DataGridView_ColumnSortModeDescr)
        ] 
        public DataGridViewColumnSortMode SortMode
        {
            get
            { 
                if ((this.flags & DATAGRIDVIEWCOLUMN_automaticSort) != 0x00)
                { 
                    return DataGridViewColumnSortMode.Automatic; 
                }
                else if ((this.flags & DATAGRIDVIEWCOLUMN_programmaticSort) != 0x00) 
                {
                    return DataGridViewColumnSortMode.Programmatic;
                }
                else 
                {
                    return DataGridViewColumnSortMode.NotSortable; 
                } 
            }
            set 
            {
                if (value != this.SortMode)
                {
                    if (value != DataGridViewColumnSortMode.NotSortable) 
                    {
                        if (this.DataGridView != null && 
                            !this.DataGridView.InInitialization && 
                            value == DataGridViewColumnSortMode.Automatic &&
                            (this.DataGridView.SelectionMode == DataGridViewSelectionMode.FullColumnSelect || 
                            this.DataGridView.SelectionMode == DataGridViewSelectionMode.ColumnHeaderSelect))
                        {
                            throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_SortModeAndSelectionModeClash, (value).ToString(), this.DataGridView.SelectionMode.ToString()));
                        } 
                        if (value == DataGridViewColumnSortMode.Automatic)
                        { 
                            this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_programmaticSort); 
                            this.flags |= (byte)DATAGRIDVIEWCOLUMN_automaticSort;
                        } 
                        else
                        {
                            this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_automaticSort);
                            this.flags |= (byte)DATAGRIDVIEWCOLUMN_programmaticSort; 
                        }
                    } 
                    else 
                    {
                        this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_automaticSort); 
                        this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_programmaticSort);
                    }
                    if (this.DataGridView != null)
                    { 
                        this.DataGridView.OnColumnSortModeChanged(this);
                    } 
                } 
            }
        } 

        /// 
        [
            DefaultValue(""), 
            Localizable(true),
            SRCategory(SR.CatAppearance), 
            SRDescription(SR.DataGridView_ColumnToolTipTextDescr) 
        ]
        public string ToolTipText 
        {
            get
            {
                return this.HeaderCell.ToolTipText; 
            }
            set 
            { 
                if (String.Compare(this.ToolTipText, value, false /*ignore case*/, CultureInfo.InvariantCulture) != 0)
                { 
                    this.HeaderCell.ToolTipText = value;

                    if (this.DataGridView != null)
                    { 
                        this.DataGridView.OnColumnToolTipTextChanged(this);
                    } 
                } 
            }
        } 

        internal float UsedFillWeight
        {
            get 
            {
                return this.usedFillWeight; 
            } 
            set
            { 
                Debug.Assert(value > 0);
                this.usedFillWeight = value;
            }
        } 

        ///  
        [ 
            Browsable(false),
            DefaultValue(null), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public Type ValueType
        { 
            get
            { 
                return (Type) this.Properties.GetObject(PropDataGridViewColumnValueType); 
            }
            set 
            {
                // what should we do when we modify the ValueType in the dataGridView column???
                this.Properties.SetObject(PropDataGridViewColumnValueType, value);
            } 
        }
 
        ///  
        [
            DefaultValue(true), 
            Localizable(true),
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnVisibleDescr)
        ] 
        public override bool Visible
        { 
            get 
            {
                return base.Visible; 
            }
            set
            {
                base.Visible = value; 
            }
        } 
 
        /// 
        [ 
            SRCategory(SR.CatLayout),
            Localizable(true),
            SRDescription(SR.DataGridView_ColumnWidthDescr),
            RefreshProperties(RefreshProperties.Repaint) 
        ]
        public int Width 
        { 
            get
            { 
                return this.Thickness;
            }
            set
            { 
                this.Thickness = value;
            } 
        } 

        ///  
        public override object Clone()
        {
            // SECREVIEW : Late-binding does not represent a security thread, see bug#411899 for more info..
            // 
            DataGridViewColumn dataGridViewColumn = (DataGridViewColumn) System.Activator.CreateInstance(this.GetType());
            if (dataGridViewColumn != null) 
            { 
                CloneInternal(dataGridViewColumn);
            } 
            return dataGridViewColumn;
        }

        internal void CloneInternal(DataGridViewColumn dataGridViewColumn) 
        {
            base.CloneInternal(dataGridViewColumn); 
 
            dataGridViewColumn.name = this.Name;
            dataGridViewColumn.displayIndex = -1; 
            dataGridViewColumn.HeaderText = this.HeaderText;
            dataGridViewColumn.DataPropertyName = this.DataPropertyName;

            // dataGridViewColumn.boundColumnConverter = columnTemplate.BoundColumnConverter;  setting the DataPropertyName should also set the bound column converter later on. 
            if (dataGridViewColumn.CellTemplate != null)
            { 
                dataGridViewColumn.cellTemplate = (DataGridViewCell)this.CellTemplate.Clone(); 
            }
            else 
            {
                dataGridViewColumn.cellTemplate = null;
            }
 
            if (this.HasHeaderCell)
            { 
                dataGridViewColumn.HeaderCell = (DataGridViewColumnHeaderCell) this.HeaderCell.Clone(); 
            }
 
            dataGridViewColumn.AutoSizeMode = this.AutoSizeMode;
            dataGridViewColumn.SortMode = this.SortMode;
            dataGridViewColumn.FillWeightInternal = this.FillWeight;
        } 

        ///  
        protected override void Dispose(bool disposing) { 
            try
            { 
                if (disposing)
                {
                    //
                    lock(this) 
                    {
                        if (this.site != null && this.site.Container != null) 
                        { 
                            this.site.Container.Remove(this);
                        } 

                        if (this.disposed != null)
                        {
                            this.disposed(this, EventArgs.Empty); 
                        }
                    } 
                } 
            }
            finally 
            {
                base.Dispose(disposing);
            }
        } 

        internal DataGridViewAutoSizeColumnMode GetInheritedAutoSizeMode(DataGridView dataGridView) 
        { 
            if (dataGridView != null && this.autoSizeMode == DataGridViewAutoSizeColumnMode.NotSet)
            { 
                switch (dataGridView.AutoSizeColumnsMode)
                {
                    case DataGridViewAutoSizeColumnsMode.AllCells:
                        return DataGridViewAutoSizeColumnMode.AllCells; 

                    case DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader: 
                        return DataGridViewAutoSizeColumnMode.AllCellsExceptHeader; 

                    case DataGridViewAutoSizeColumnsMode.DisplayedCells: 
                        return DataGridViewAutoSizeColumnMode.DisplayedCells;

                    case DataGridViewAutoSizeColumnsMode.DisplayedCellsExceptHeader:
                        return DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader; 

                    case DataGridViewAutoSizeColumnsMode.ColumnHeader: 
                        return DataGridViewAutoSizeColumnMode.ColumnHeader; 

                    case DataGridViewAutoSizeColumnsMode.Fill: 
                        return DataGridViewAutoSizeColumnMode.Fill;

                    default: // None
                        return DataGridViewAutoSizeColumnMode.None; 
                }
            } 
            return this.autoSizeMode; 
        }
 
        /// 
        public virtual int GetPreferredWidth(DataGridViewAutoSizeColumnMode autoSizeColumnMode, bool fixedHeight)
        {
            if (autoSizeColumnMode == DataGridViewAutoSizeColumnMode.NotSet || 
                autoSizeColumnMode == DataGridViewAutoSizeColumnMode.None ||
                autoSizeColumnMode == DataGridViewAutoSizeColumnMode.Fill) 
            { 
                throw new ArgumentException(SR.GetString(SR.DataGridView_NeedColumnAutoSizingCriteria, "autoSizeColumnMode"));
            } 
            switch (autoSizeColumnMode) {
                case DataGridViewAutoSizeColumnMode.NotSet:
                case DataGridViewAutoSizeColumnMode.None:
                case DataGridViewAutoSizeColumnMode.ColumnHeader: 
                case DataGridViewAutoSizeColumnMode.AllCellsExceptHeader:
                case DataGridViewAutoSizeColumnMode.AllCells: 
                case DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader: 
                case DataGridViewAutoSizeColumnMode.DisplayedCells:
                case DataGridViewAutoSizeColumnMode.Fill: 
                    break;
                default:
                    throw new InvalidEnumArgumentException("value", (int) autoSizeColumnMode, typeof(DataGridViewAutoSizeColumnMode));
             } 

            DataGridView dataGridView = this.DataGridView; 
 
            Debug.Assert(dataGridView == null || this.Index > -1);
 
            if (dataGridView == null)
            {
                return -1;
            } 

            DataGridViewAutoSizeColumnCriteriaInternal autoSizeColumnCriteriaInternal = (DataGridViewAutoSizeColumnCriteriaInternal) autoSizeColumnMode; 
            Debug.Assert(autoSizeColumnCriteriaInternal == DataGridViewAutoSizeColumnCriteriaInternal.Header || 
                autoSizeColumnCriteriaInternal == DataGridViewAutoSizeColumnCriteriaInternal.AllRows ||
                autoSizeColumnCriteriaInternal == DataGridViewAutoSizeColumnCriteriaInternal.DisplayedRows || 
                autoSizeColumnCriteriaInternal == (DataGridViewAutoSizeColumnCriteriaInternal.Header | DataGridViewAutoSizeColumnCriteriaInternal.AllRows) ||
                autoSizeColumnCriteriaInternal == (DataGridViewAutoSizeColumnCriteriaInternal.Header | DataGridViewAutoSizeColumnCriteriaInternal.DisplayedRows));

            int preferredColumnThickness = 0, preferredCellThickness, rowIndex; 
            DataGridViewRow dataGridViewRow;
            Debug.Assert(dataGridView.ColumnHeadersVisible || autoSizeColumnCriteriaInternal != DataGridViewAutoSizeColumnCriteriaInternal.Header); 
 
            // take into account the preferred width of the header cell if displayed and cared about
            if (dataGridView.ColumnHeadersVisible && 
                (autoSizeColumnCriteriaInternal & DataGridViewAutoSizeColumnCriteriaInternal.Header) != 0)
            {
                if (fixedHeight)
                { 
                    preferredCellThickness = this.HeaderCell.GetPreferredWidth(-1, dataGridView.ColumnHeadersHeight);
                } 
                else 
                {
                    preferredCellThickness = this.HeaderCell.GetPreferredSize(-1).Width; 
                }
                if (preferredColumnThickness < preferredCellThickness)
                {
                    preferredColumnThickness = preferredCellThickness; 
                }
            } 
            if ((autoSizeColumnCriteriaInternal & DataGridViewAutoSizeColumnCriteriaInternal.AllRows) != 0) 
            {
                for (rowIndex = dataGridView.Rows.GetFirstRow(DataGridViewElementStates.Visible); 
                    rowIndex != -1;
                    rowIndex = dataGridView.Rows.GetNextRow(rowIndex, DataGridViewElementStates.Visible))
                {
                    dataGridViewRow = dataGridView.Rows.SharedRow(rowIndex); 
                    if (fixedHeight)
                    { 
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredWidth(rowIndex, dataGridViewRow.Thickness); 
                    }
                    else 
                    {
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredSize(rowIndex).Width;
                    }
                    if (preferredColumnThickness < preferredCellThickness) 
                    {
                        preferredColumnThickness = preferredCellThickness; 
                    } 
                }
            } 
            else if ((autoSizeColumnCriteriaInternal & DataGridViewAutoSizeColumnCriteriaInternal.DisplayedRows) != 0)
            {
                int displayHeight = dataGridView.LayoutInfo.Data.Height;
                int cy = 0; 

                rowIndex = dataGridView.Rows.GetFirstRow(DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen); 
                while (rowIndex != -1 && cy < displayHeight) 
                {
                    dataGridViewRow = dataGridView.Rows.SharedRow(rowIndex); 
                    if (fixedHeight)
                    {
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredWidth(rowIndex, dataGridViewRow.Thickness);
                    } 
                    else
                    { 
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredSize(rowIndex).Width; 
                    }
                    if (preferredColumnThickness < preferredCellThickness) 
                    {
                        preferredColumnThickness = preferredCellThickness;
                    }
                    cy += dataGridViewRow.Thickness; 
                    rowIndex = dataGridView.Rows.GetNextRow(rowIndex,
                        DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen); 
                } 

                if (cy < displayHeight) 
                {
                    rowIndex = dataGridView.DisplayedBandsInfo.FirstDisplayedScrollingRow;
                    while (rowIndex != -1 && cy < displayHeight)
                    { 
                        dataGridViewRow = dataGridView.Rows.SharedRow(rowIndex);
                        if (fixedHeight) 
                        { 
                            preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredWidth(rowIndex, dataGridViewRow.Thickness);
                        } 
                        else
                        {
                            preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredSize(rowIndex).Width;
                        } 
                        if (preferredColumnThickness < preferredCellThickness)
                        { 
                            preferredColumnThickness = preferredCellThickness; 
                        }
                        cy += dataGridViewRow.Thickness; 
                        rowIndex = dataGridView.Rows.GetNextRow(rowIndex, DataGridViewElementStates.Visible);
                    }
                }
            } 
            return preferredColumnThickness;
        } 
 
        /// 
        public override string ToString() 
        {
            StringBuilder sb = new StringBuilder(64);
            sb.Append("DataGridViewColumn { Name=");
            sb.Append(this.Name); 
            sb.Append(", Index=");
            sb.Append(this.Index.ToString(CultureInfo.CurrentCulture)); 
            sb.Append(" }"); 
            return sb.ToString();
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms 
{ 
    using System;
    using System.Text; 
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Globalization;
    using System.Diagnostics; 
    using System.Diagnostics.CodeAnalysis;
 
    ///  
    /// 
    ///     Base class for the columns in a data grid view. 
    /// 
    [
        Designer("System.Windows.Forms.Design.DataGridViewColumnDesigner, " + AssemblyRef.SystemDesign),
        TypeConverterAttribute(typeof(DataGridViewColumnConverter)), 
        ToolboxItem(false),
        DesignTimeVisible(false) 
    ] 
    public class DataGridViewColumn : DataGridViewBand, IComponent
    { 
        private const float DATAGRIDVIEWCOLUMN_defaultFillWeight = 100F;
        private const int   DATAGRIDVIEWCOLUMN_defaultWidth = 100;
        private const int   DATAGRIDVIEWCOLUMN_defaultMinColumnThickness = 5;
 
        private const byte DATAGRIDVIEWCOLUMN_automaticSort                     = 0x01;
        private const byte DATAGRIDVIEWCOLUMN_programmaticSort                  = 0x02; 
        private const byte DATAGRIDVIEWCOLUMN_isDataBound                       = 0x04; 
        private const byte DATAGRIDVIEWCOLUMN_isBrowsableInternal               = 0x08;
        private const byte DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal    = 0x10; 

        private byte flags;  // see DATAGRIDVIEWCOLUMN_ consts above
        private DataGridViewCell cellTemplate;
        private string name; 
        private int displayIndex;
        private int desiredFillWidth = 0; 
        private int desiredMinimumWidth = 0; 
        private float fillWeight, usedFillWeight;
        private DataGridViewAutoSizeColumnMode autoSizeMode; 
        private int boundColumnIndex = -1;
        private string dataPropertyName = String.Empty;
        private TypeConverter boundColumnConverter = null;
 
        // needed for IComponent
        private ISite site = null; 
        private EventHandler disposed = null; 

        private static readonly int PropDataGridViewColumnValueType = PropertyStore.CreateKey(); 

        /// 
        /// 
        ///     
        ///       Initializes a new instance of the  class.
        ///     
        ///  
        public DataGridViewColumn() : this((DataGridViewCell) null)
        { 
        }

        /// 
        public DataGridViewColumn(DataGridViewCell cellTemplate) : base() 
        {
            this.fillWeight = DATAGRIDVIEWCOLUMN_defaultFillWeight; 
            this.usedFillWeight = DATAGRIDVIEWCOLUMN_defaultFillWeight; 
            this.Thickness = DATAGRIDVIEWCOLUMN_defaultWidth;
            this.MinimumThickness = DATAGRIDVIEWCOLUMN_defaultMinColumnThickness; 
            this.name = String.Empty;
            this.bandIsRow = false;
            this.displayIndex = -1;
            this.cellTemplate = cellTemplate; 
            this.autoSizeMode = DataGridViewAutoSizeColumnMode.NotSet;
        } 
 
        /// 
        [ 
            SRCategory(SR.CatLayout),
            DefaultValue(DataGridViewAutoSizeColumnMode.NotSet),
            SRDescription(SR.DataGridViewColumn_AutoSizeModeDescr),
            RefreshProperties(RefreshProperties.Repaint) 
        ]
        public DataGridViewAutoSizeColumnMode AutoSizeMode 
        { 
            get
            { 
                return this.autoSizeMode;
            }
            set
            { 
               switch (value)
               { 
                   case DataGridViewAutoSizeColumnMode.NotSet: 
                   case DataGridViewAutoSizeColumnMode.None:
                   case DataGridViewAutoSizeColumnMode.ColumnHeader: 
                   case DataGridViewAutoSizeColumnMode.AllCellsExceptHeader:
                   case DataGridViewAutoSizeColumnMode.AllCells:
                   case DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader:
                   case DataGridViewAutoSizeColumnMode.DisplayedCells: 
                   case DataGridViewAutoSizeColumnMode.Fill:
                       break; 
                   default: 
                       throw new InvalidEnumArgumentException("value", (int)value, typeof(DataGridViewAutoSizeColumnMode));
                } 
                if (this.autoSizeMode != value)
                {
                    if (this.Visible && this.DataGridView != null)
                    { 
                        if (!this.DataGridView.ColumnHeadersVisible &&
                            (value == DataGridViewAutoSizeColumnMode.ColumnHeader || 
                             (value == DataGridViewAutoSizeColumnMode.NotSet && this.DataGridView.AutoSizeColumnsMode == DataGridViewAutoSizeColumnsMode.ColumnHeader))) 
                        {
                            throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_AutoSizeCriteriaCannotUseInvisibleHeaders)); 
                        }
                        if (this.Frozen &&
                            (value == DataGridViewAutoSizeColumnMode.Fill ||
                             (value == DataGridViewAutoSizeColumnMode.NotSet && this.DataGridView.AutoSizeColumnsMode == DataGridViewAutoSizeColumnsMode.Fill))) 
                        {
                            // Cannot set the inherited auto size mode to Fill when the column is frozen 
                            throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_FrozenColumnCannotAutoFill)); 
                        }
                    } 
                    DataGridViewAutoSizeColumnMode previousInheritedMode = this.InheritedAutoSizeMode;
                    bool previousInheritedModeAutoSized = previousInheritedMode != DataGridViewAutoSizeColumnMode.Fill &&
                                                          previousInheritedMode != DataGridViewAutoSizeColumnMode.None &&
                                                          previousInheritedMode != DataGridViewAutoSizeColumnMode.NotSet; 
                    this.autoSizeMode = value;
                    if (this.DataGridView == null) 
                    { 
                        if (this.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.Fill &&
                            this.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.None && 
                            this.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.NotSet)
                        {
                            if (!previousInheritedModeAutoSized)
                            { 
                                // Save current column width for later reuse
                                this.CachedThickness = this.Thickness; 
                            } 
                        }
                        else 
                        {
                            if (this.Thickness != this.CachedThickness && previousInheritedModeAutoSized)
                            {
                                // Restoring cached column width 
                                this.ThicknessInternal = this.CachedThickness;
                            } 
                        } 
                    }
                    else 
                    {
                        this.DataGridView.OnAutoSizeColumnModeChanged(this, previousInheritedMode);
                    }
                } 
            }
        } 
 
        // TypeConverter of the PropertyDescriptor attached to this column
        // in databound cases. Null otherwise. 
        internal TypeConverter BoundColumnConverter
        {
            get
            { 
                return this.boundColumnConverter;
            } 
            set 
            {
                this.boundColumnConverter = value; 
            }
        }

        internal int BoundColumnIndex 
        {
            get 
            { 
                return this.boundColumnIndex;
            } 
            set
            {
                this.boundColumnIndex = value;
            } 
        }
 
        ///  
        [
            Browsable(false), 
            EditorBrowsable(EditorBrowsableState.Advanced),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public virtual DataGridViewCell CellTemplate 
        {
            get 
            { 
                return this.cellTemplate;
            } 
            set
            {
                this.cellTemplate = value;
            } 
        }
 
        ///  
        [
            Browsable(false), 
            EditorBrowsable(EditorBrowsableState.Advanced),
        ]
        public Type CellType
        { 
            get
            { 
                if (this.cellTemplate != null) 
                {
                    return this.cellTemplate.GetType(); 
                }
                else
                {
                    return null; 
                }
            } 
        } 

        ///  
        [
            DefaultValue(null),
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ColumnContextMenuStripDescr) 
        ]
        public override ContextMenuStrip ContextMenuStrip 
        { 
            get
            { 
                return base.ContextMenuStrip;
            }
            set
            { 
                base.ContextMenuStrip = value;
            } 
        } 

        ///  
        [
            Browsable(true),
            DefaultValue(""),
            TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, " + AssemblyRef.SystemDesign), 
            Editor("System.Windows.Forms.Design.DataGridViewColumnDataPropertyNameEditor, " + AssemblyRef.SystemDesign, typeof(System.Drawing.Design.UITypeEditor)),
            SRDescription(SR.DataGridView_ColumnDataPropertyNameDescr), 
            SRCategory(SR.CatData) 
        ]
        public string DataPropertyName 
        {
            get
            {
                return this.dataPropertyName; 
            }
            set 
            { 
                if (value == null)
                { 
                    value = String.Empty;
                }
                if (value != this.dataPropertyName)
                { 
                    this.dataPropertyName = value;
                    if (this.DataGridView != null) 
                    { 
                        this.DataGridView.OnColumnDataPropertyNameChanged(this);
                    } 
                }
            }
        }
 
        /// 
        [ 
            Browsable(true), 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnDefaultCellStyleDescr) 
        ]
        public override DataGridViewCellStyle DefaultCellStyle
        {
            get 
            {
                return base.DefaultCellStyle; 
            } 
            set
            { 
                base.DefaultCellStyle = value;
            }
        }
 
        private bool ShouldSerializeDefaultCellStyle()
        { 
 
            if (!this.HasDefaultCellStyle)
            { 
                return false;
            }

            DataGridViewCellStyle defaultCellStyle = this.DefaultCellStyle; 

            return (!defaultCellStyle.BackColor.IsEmpty || 
                    !defaultCellStyle.ForeColor.IsEmpty || 
                    !defaultCellStyle.SelectionBackColor.IsEmpty ||
                    !defaultCellStyle.SelectionForeColor.IsEmpty || 
                    defaultCellStyle.Font != null ||
                    !defaultCellStyle.IsNullValueDefault ||
                    !defaultCellStyle.IsDataSourceNullValueDefault ||
                    !String.IsNullOrEmpty(defaultCellStyle.Format) || 
                    !defaultCellStyle.FormatProvider.Equals(System.Globalization.CultureInfo.CurrentCulture) ||
                    defaultCellStyle.Alignment != DataGridViewContentAlignment.NotSet || 
                    defaultCellStyle.WrapMode != DataGridViewTriState.NotSet || 
                    defaultCellStyle.Tag !=  null ||
                    !defaultCellStyle.Padding.Equals(Padding.Empty)); 
        }

        internal int DesiredFillWidth
        { 
            get
            { 
                return this.desiredFillWidth; 
            }
            set 
            {
                this.desiredFillWidth = value;
            }
        } 

        internal int DesiredMinimumWidth 
        { 
            get
            { 
                return this.desiredMinimumWidth;
            }
            set
            { 
                this.desiredMinimumWidth = value;
            } 
        } 

        ///  
        [
            Browsable(false),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public int DisplayIndex
        { 
            get 
            {
                return this.displayIndex; 
            }
            set
            {
                if (this.displayIndex != value) 
                {
                    if (value == Int32.MaxValue) 
                    { 
                        throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexTooLarge, Int32.MaxValue.ToString(CultureInfo.CurrentCulture)));
                    } 
                    if (this.DataGridView != null)
                    {
                        if (value < 0)
                        { 
                            throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexNegative));
                        } 
                        if (value >= this.DataGridView.Columns.Count) 
                        {
                            throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexExceedsColumnCount)); 
                        }
                        // Will throw an error if a visible frozen column is placed inside a non-frozen area or vice-versa.
                        this.DataGridView.OnColumnDisplayIndexChanging(this, value);
                        this.displayIndex = value; 
                        try
                        { 
                            this.DataGridView.InDisplayIndexAdjustments = true; 
                            this.DataGridView.OnColumnDisplayIndexChanged_PreNotification();
                            this.DataGridView.OnColumnDisplayIndexChanged(this); 
                            this.DataGridView.OnColumnDisplayIndexChanged_PostNotification();
                        }
                        finally
                        { 
                            this.DataGridView.InDisplayIndexAdjustments = false;
                        } 
                    } 
                    else
                    { 
                        if (value < -1)
                        {
                            throw new ArgumentOutOfRangeException("DisplayIndex", value, SR.GetString(SR.DataGridViewColumn_DisplayIndexTooNegative));
                        } 
                        this.displayIndex = value;
                    } 
                } 
            }
        } 

        internal bool DisplayIndexHasChanged
        {
            get 
            {
                return (this.flags & DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal) != 0; 
            } 
            set
            { 
                if (value)
                {
                    this.flags |= (byte) DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal;
                } 
                else
                { 
                    this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_displayIndexHasChangedInternal); 
                }
            } 
        }

        internal int DisplayIndexInternal
        { 
            set
            { 
                Debug.Assert(value >= -1); 
                Debug.Assert(value < Int32.MaxValue);
 
                this.displayIndex = value;
            }
        }
 
        /// 
        [ 
            Browsable(false), 
            EditorBrowsable(EditorBrowsableState.Advanced)
        ] 
        public event EventHandler Disposed
        {
            add
            { 
                this.disposed += value;
            } 
            remove 
            {
                this.disposed -= value; 
            }
        }

        ///  
        [
            DefaultValue(0), 
            SRCategory(SR.CatLayout), 
            SRDescription(SR.DataGridView_ColumnDividerWidthDescr)
        ] 
        public int DividerWidth
        {
            get
            { 
                return this.DividerThickness;
            } 
            set 
            {
                this.DividerThickness = value; 
            }
        }

        ///  
        [
            SRCategory(SR.CatLayout), 
            DefaultValue(DATAGRIDVIEWCOLUMN_defaultFillWeight), 
            SRDescription(SR.DataGridViewColumn_FillWeightDescr),
        ] 
        public float FillWeight
        {
            get
            { 
                return this.fillWeight;
            } 
            set 
            {
                if (value <= 0) 
                {
                    throw new ArgumentOutOfRangeException("FillWeight", SR.GetString(SR.InvalidLowBoundArgument, "FillWeight", (value).ToString(CultureInfo.CurrentCulture), (0).ToString(CultureInfo.CurrentCulture)));
                }
                if (value > (float)ushort.MaxValue) 
                {
                    throw new ArgumentOutOfRangeException("FillWeight", SR.GetString(SR.InvalidHighBoundArgumentEx, "FillWeight", (value).ToString(CultureInfo.CurrentCulture), (ushort.MaxValue).ToString(CultureInfo.CurrentCulture))); 
                } 
                if (this.DataGridView != null)
                { 
                    this.DataGridView.OnColumnFillWeightChanging(this, value);
                    this.fillWeight = value;
                    this.DataGridView.OnColumnFillWeightChanged(this);
                } 
                else
                { 
                    this.fillWeight = value; 
                }
            } 
        }

        internal float FillWeightInternal
        { 
            set
            { 
                Debug.Assert(value > 0); 
                this.fillWeight = value;
            } 
        }

        /// 
        [ 
            DefaultValue(false),
            RefreshProperties(RefreshProperties.All), 
            SRCategory(SR.CatLayout), 
            SRDescription(SR.DataGridView_ColumnFrozenDescr)
        ] 
        public override bool Frozen
        {
            get
            { 
                return base.Frozen;
            } 
            set 
            {
                base.Frozen = value; 
            }
        }

        ///  
        [
            Browsable(false), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) 
        ]
        public DataGridViewColumnHeaderCell HeaderCell 
        {
            get
            {
                return (DataGridViewColumnHeaderCell) base.HeaderCellCore; 
            }
            set 
            { 
                base.HeaderCellCore = value;
            } 
        }

        /// 
        [ 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnHeaderTextDescr), 
            Localizable(true) 
        ]
        public string HeaderText 
        {
            get
            {
                if (this.HasHeaderCell) 
                {
                    string headerValue = this.HeaderCell.Value as string; 
                    if (headerValue != null) 
                    {
                        return headerValue; 
                    }
                    else
                    {
                        return string.Empty; 
                    }
                } 
                else 
                {
                    return string.Empty; 
                }
            }
            set
            { 
                if ((value != null || this.HasHeaderCell) &&
                    this.HeaderCell.ValueType != null && 
                    this.HeaderCell.ValueType.IsAssignableFrom(typeof(System.String))) 
                {
                    this.HeaderCell.Value = value; 
                }
            }
        }
 
        private bool ShouldSerializeHeaderText()
        { 
            return this.HasHeaderCell && ((DataGridViewColumnHeaderCell) this.HeaderCell).ContainsLocalValue; 
        }
 
        /// 
        [
            Browsable(false),
            EditorBrowsable(EditorBrowsableState.Advanced), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public DataGridViewAutoSizeColumnMode InheritedAutoSizeMode 
        {
            get 
            {
                return GetInheritedAutoSizeMode(this.DataGridView);
            }
        } 

        ///  
        [ 
            Browsable(false)
        ] 
        public override DataGridViewCellStyle InheritedStyle
        {
            get
            { 
                DataGridViewCellStyle columnStyle = null;
                Debug.Assert(this.Index > -1); 
                if (this.HasDefaultCellStyle) 
                {
                    columnStyle = this.DefaultCellStyle; 
                    Debug.Assert(columnStyle != null);
                }

                if (this.DataGridView == null) 
                {
                    return columnStyle; 
                } 

                DataGridViewCellStyle inheritedCellStyleTmp = new DataGridViewCellStyle(); 
                DataGridViewCellStyle dataGridViewStyle = this.DataGridView.DefaultCellStyle;
                Debug.Assert(dataGridViewStyle != null);

                if (columnStyle != null && !columnStyle.BackColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.BackColor = columnStyle.BackColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.BackColor = dataGridViewStyle.BackColor;
                }

                if (columnStyle != null && !columnStyle.ForeColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.ForeColor = columnStyle.ForeColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.ForeColor = dataGridViewStyle.ForeColor;
                }

                if (columnStyle != null && !columnStyle.SelectionBackColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.SelectionBackColor = columnStyle.SelectionBackColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.SelectionBackColor = dataGridViewStyle.SelectionBackColor;
                }

                if (columnStyle != null && !columnStyle.SelectionForeColor.IsEmpty) 
                {
                    inheritedCellStyleTmp.SelectionForeColor = columnStyle.SelectionForeColor; 
                } 
                else
                { 
                    inheritedCellStyleTmp.SelectionForeColor = dataGridViewStyle.SelectionForeColor;
                }

                if (columnStyle != null && columnStyle.Font != null) 
                {
                    inheritedCellStyleTmp.Font = columnStyle.Font; 
                } 
                else
                { 
                    inheritedCellStyleTmp.Font = dataGridViewStyle.Font;
                }

                if (columnStyle != null && !columnStyle.IsNullValueDefault) 
                {
                    inheritedCellStyleTmp.NullValue = columnStyle.NullValue; 
                } 
                else
                { 
                    inheritedCellStyleTmp.NullValue = dataGridViewStyle.NullValue;
                }

                if (columnStyle != null && !columnStyle.IsDataSourceNullValueDefault) 
                {
                    inheritedCellStyleTmp.DataSourceNullValue = columnStyle.DataSourceNullValue; 
                } 
                else
                { 
                    inheritedCellStyleTmp.DataSourceNullValue = dataGridViewStyle.DataSourceNullValue;
                }

                if (columnStyle != null && columnStyle.Format.Length != 0) 
                {
                    inheritedCellStyleTmp.Format = columnStyle.Format; 
                } 
                else
                { 
                    inheritedCellStyleTmp.Format = dataGridViewStyle.Format;
                }

                if (columnStyle != null && !columnStyle.IsFormatProviderDefault) 
                {
                    inheritedCellStyleTmp.FormatProvider = columnStyle.FormatProvider; 
                } 
                else
                { 
                    inheritedCellStyleTmp.FormatProvider = dataGridViewStyle.FormatProvider;
                }

                if (columnStyle != null && columnStyle.Alignment != DataGridViewContentAlignment.NotSet) 
                {
                    inheritedCellStyleTmp.AlignmentInternal = columnStyle.Alignment; 
                } 
                else
                { 
                    Debug.Assert(dataGridViewStyle.Alignment != DataGridViewContentAlignment.NotSet);
                    inheritedCellStyleTmp.AlignmentInternal = dataGridViewStyle.Alignment;
                }
 
                if (columnStyle != null && columnStyle.WrapMode != DataGridViewTriState.NotSet)
                { 
                    inheritedCellStyleTmp.WrapModeInternal = columnStyle.WrapMode; 
                }
                else 
                {
                    Debug.Assert(dataGridViewStyle.WrapMode != DataGridViewTriState.NotSet);
                    inheritedCellStyleTmp.WrapModeInternal = dataGridViewStyle.WrapMode;
                } 

                if (columnStyle != null && columnStyle.Tag != null) 
                { 
                    inheritedCellStyleTmp.Tag = columnStyle.Tag;
                } 
                else
                {
                    inheritedCellStyleTmp.Tag = dataGridViewStyle.Tag;
                } 

                if (columnStyle != null && columnStyle.Padding != Padding.Empty) 
                { 
                    inheritedCellStyleTmp.PaddingInternal = columnStyle.Padding;
                } 
                else
                {
                    inheritedCellStyleTmp.PaddingInternal = dataGridViewStyle.Padding;
                } 

                return inheritedCellStyleTmp; 
            } 
        }
 
        internal bool IsBrowsableInternal
        {
            get
            { 
                return (this.flags & DATAGRIDVIEWCOLUMN_isBrowsableInternal) != 0;
            } 
            set 
            {
                if (value) 
                {
                    this.flags |= (byte) DATAGRIDVIEWCOLUMN_isBrowsableInternal;
                }
                else 
                {
                    this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_isBrowsableInternal); 
                } 
            }
        } 

        /// 
        [
            Browsable(false), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public bool IsDataBound 
        {
            get 
            {
                return this.IsDataBoundInternal;
            }
        } 

        internal bool IsDataBoundInternal 
        { 
            get
            { 
                return (this.flags & DATAGRIDVIEWCOLUMN_isDataBound) != 0;
            }
            set
            { 
                if (value)
                { 
                    this.flags |= (byte)DATAGRIDVIEWCOLUMN_isDataBound; 
                }
                else 
                {
                    this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_isDataBound);
                }
            } 
        }
 
        ///  
        [
            DefaultValue(DATAGRIDVIEWCOLUMN_defaultMinColumnThickness), 
            Localizable(true),
            SRCategory(SR.CatLayout),
            SRDescription(SR.DataGridView_ColumnMinimumWidthDescr),
            RefreshProperties(RefreshProperties.Repaint) 
        ]
        public int MinimumWidth 
        { 
            get
            { 
                return this.MinimumThickness;
            }
            set
            { 
                this.MinimumThickness = value;
            } 
        } 

        ///  
        [
            Browsable(false)
        ]
        public string Name 
        {
            get 
            { 
                //
                // Change needed to bring the design time and the runtime "Name" property together. 
                // The ExtenderProvider adds a "Name" property of its own. It does this for all IComponents.
                // The "Name" property added by the ExtenderProvider interacts only w/ the Site property.
                // The Control class' Name property can be changed only thru the "Name" property provided by the
                // Extender Service. 
                //
                // However, the user can change the DataGridView::Name property in the DataGridViewEditColumnDialog. 
                // So while the Control can fall back to Site.Name if the user did not explicitly set Control::Name, 
                // the DataGridViewColumn should always go first to the Site.Name to retrieve the name.
                // 
                // NOTE: one side effect of bringing together the design time and the run time "Name" properties is that DataGridViewColumn::Name changes.
                // However, DataGridView does not fire ColumnNameChanged event.
                // We can't fix this because ISite does not provide Name change notification. So in effect
                // DataGridViewColumn does not know when its name changed. 
                // I talked w/ MarkRi and he is perfectly fine w/ DataGridViewColumn::Name changing w/o ColumnNameChanged
                // being fired. 
                // 
                if (this.Site != null && !String.IsNullOrEmpty(this.Site.Name))
                { 
                    this.name = this.Site.Name;
                }

                return name; 
            }
            set 
            { 
                string oldName = this.name;
                if (String.IsNullOrEmpty(value)) 
                {
                    this.name = string.Empty;
                }
                else 
                {
                    this.name = value; 
                } 

                if (this.DataGridView != null && !string.Equals(this.name, oldName,StringComparison.Ordinal)) 
                {
                    this.DataGridView.OnColumnNameChanged(this);
                }
            } 
        }
 
        ///  
        [
            SRCategory(SR.CatBehavior), 
            SRDescription(SR.DataGridView_ColumnReadOnlyDescr)
        ]
        public override bool ReadOnly
        { 
            get
            { 
                return base.ReadOnly; 
            }
            set 
            {
                if (this.IsDataBound &&
                    this.DataGridView != null &&
                    this.DataGridView.DataConnection != null && 
                    this.boundColumnIndex != -1 &&
                    this.DataGridView.DataConnection.DataFieldIsReadOnly(this.boundColumnIndex) && 
                    !value) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridView_ColumnBoundToAReadOnlyFieldMustRemainReadOnly)); 
                }
                base.ReadOnly = value;
            }
        } 

        ///  
        [ 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ColumnResizableDescr) 
        ]
        public override DataGridViewTriState Resizable
        {
            get 
            {
                return base.Resizable; 
            } 
            set
            { 
                base.Resizable = value;
            }
        }
 
        /// 
        [ 
            Browsable(false), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public ISite Site
        {
            get
            { 
                return this.site;
            } 
            set 
            {
                this.site = value; 
            }
        }

        ///  
        [
            DefaultValue(DataGridViewColumnSortMode.NotSortable), 
            SRCategory(SR.CatBehavior), 
            SRDescription(SR.DataGridView_ColumnSortModeDescr)
        ] 
        public DataGridViewColumnSortMode SortMode
        {
            get
            { 
                if ((this.flags & DATAGRIDVIEWCOLUMN_automaticSort) != 0x00)
                { 
                    return DataGridViewColumnSortMode.Automatic; 
                }
                else if ((this.flags & DATAGRIDVIEWCOLUMN_programmaticSort) != 0x00) 
                {
                    return DataGridViewColumnSortMode.Programmatic;
                }
                else 
                {
                    return DataGridViewColumnSortMode.NotSortable; 
                } 
            }
            set 
            {
                if (value != this.SortMode)
                {
                    if (value != DataGridViewColumnSortMode.NotSortable) 
                    {
                        if (this.DataGridView != null && 
                            !this.DataGridView.InInitialization && 
                            value == DataGridViewColumnSortMode.Automatic &&
                            (this.DataGridView.SelectionMode == DataGridViewSelectionMode.FullColumnSelect || 
                            this.DataGridView.SelectionMode == DataGridViewSelectionMode.ColumnHeaderSelect))
                        {
                            throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_SortModeAndSelectionModeClash, (value).ToString(), this.DataGridView.SelectionMode.ToString()));
                        } 
                        if (value == DataGridViewColumnSortMode.Automatic)
                        { 
                            this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_programmaticSort); 
                            this.flags |= (byte)DATAGRIDVIEWCOLUMN_automaticSort;
                        } 
                        else
                        {
                            this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_automaticSort);
                            this.flags |= (byte)DATAGRIDVIEWCOLUMN_programmaticSort; 
                        }
                    } 
                    else 
                    {
                        this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_automaticSort); 
                        this.flags = (byte)(this.flags & ~DATAGRIDVIEWCOLUMN_programmaticSort);
                    }
                    if (this.DataGridView != null)
                    { 
                        this.DataGridView.OnColumnSortModeChanged(this);
                    } 
                } 
            }
        } 

        /// 
        [
            DefaultValue(""), 
            Localizable(true),
            SRCategory(SR.CatAppearance), 
            SRDescription(SR.DataGridView_ColumnToolTipTextDescr) 
        ]
        public string ToolTipText 
        {
            get
            {
                return this.HeaderCell.ToolTipText; 
            }
            set 
            { 
                if (String.Compare(this.ToolTipText, value, false /*ignore case*/, CultureInfo.InvariantCulture) != 0)
                { 
                    this.HeaderCell.ToolTipText = value;

                    if (this.DataGridView != null)
                    { 
                        this.DataGridView.OnColumnToolTipTextChanged(this);
                    } 
                } 
            }
        } 

        internal float UsedFillWeight
        {
            get 
            {
                return this.usedFillWeight; 
            } 
            set
            { 
                Debug.Assert(value > 0);
                this.usedFillWeight = value;
            }
        } 

        ///  
        [ 
            Browsable(false),
            DefaultValue(null), 
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public Type ValueType
        { 
            get
            { 
                return (Type) this.Properties.GetObject(PropDataGridViewColumnValueType); 
            }
            set 
            {
                // what should we do when we modify the ValueType in the dataGridView column???
                this.Properties.SetObject(PropDataGridViewColumnValueType, value);
            } 
        }
 
        ///  
        [
            DefaultValue(true), 
            Localizable(true),
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnVisibleDescr)
        ] 
        public override bool Visible
        { 
            get 
            {
                return base.Visible; 
            }
            set
            {
                base.Visible = value; 
            }
        } 
 
        /// 
        [ 
            SRCategory(SR.CatLayout),
            Localizable(true),
            SRDescription(SR.DataGridView_ColumnWidthDescr),
            RefreshProperties(RefreshProperties.Repaint) 
        ]
        public int Width 
        { 
            get
            { 
                return this.Thickness;
            }
            set
            { 
                this.Thickness = value;
            } 
        } 

        ///  
        public override object Clone()
        {
            // SECREVIEW : Late-binding does not represent a security thread, see bug#411899 for more info..
            // 
            DataGridViewColumn dataGridViewColumn = (DataGridViewColumn) System.Activator.CreateInstance(this.GetType());
            if (dataGridViewColumn != null) 
            { 
                CloneInternal(dataGridViewColumn);
            } 
            return dataGridViewColumn;
        }

        internal void CloneInternal(DataGridViewColumn dataGridViewColumn) 
        {
            base.CloneInternal(dataGridViewColumn); 
 
            dataGridViewColumn.name = this.Name;
            dataGridViewColumn.displayIndex = -1; 
            dataGridViewColumn.HeaderText = this.HeaderText;
            dataGridViewColumn.DataPropertyName = this.DataPropertyName;

            // dataGridViewColumn.boundColumnConverter = columnTemplate.BoundColumnConverter;  setting the DataPropertyName should also set the bound column converter later on. 
            if (dataGridViewColumn.CellTemplate != null)
            { 
                dataGridViewColumn.cellTemplate = (DataGridViewCell)this.CellTemplate.Clone(); 
            }
            else 
            {
                dataGridViewColumn.cellTemplate = null;
            }
 
            if (this.HasHeaderCell)
            { 
                dataGridViewColumn.HeaderCell = (DataGridViewColumnHeaderCell) this.HeaderCell.Clone(); 
            }
 
            dataGridViewColumn.AutoSizeMode = this.AutoSizeMode;
            dataGridViewColumn.SortMode = this.SortMode;
            dataGridViewColumn.FillWeightInternal = this.FillWeight;
        } 

        ///  
        protected override void Dispose(bool disposing) { 
            try
            { 
                if (disposing)
                {
                    //
                    lock(this) 
                    {
                        if (this.site != null && this.site.Container != null) 
                        { 
                            this.site.Container.Remove(this);
                        } 

                        if (this.disposed != null)
                        {
                            this.disposed(this, EventArgs.Empty); 
                        }
                    } 
                } 
            }
            finally 
            {
                base.Dispose(disposing);
            }
        } 

        internal DataGridViewAutoSizeColumnMode GetInheritedAutoSizeMode(DataGridView dataGridView) 
        { 
            if (dataGridView != null && this.autoSizeMode == DataGridViewAutoSizeColumnMode.NotSet)
            { 
                switch (dataGridView.AutoSizeColumnsMode)
                {
                    case DataGridViewAutoSizeColumnsMode.AllCells:
                        return DataGridViewAutoSizeColumnMode.AllCells; 

                    case DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader: 
                        return DataGridViewAutoSizeColumnMode.AllCellsExceptHeader; 

                    case DataGridViewAutoSizeColumnsMode.DisplayedCells: 
                        return DataGridViewAutoSizeColumnMode.DisplayedCells;

                    case DataGridViewAutoSizeColumnsMode.DisplayedCellsExceptHeader:
                        return DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader; 

                    case DataGridViewAutoSizeColumnsMode.ColumnHeader: 
                        return DataGridViewAutoSizeColumnMode.ColumnHeader; 

                    case DataGridViewAutoSizeColumnsMode.Fill: 
                        return DataGridViewAutoSizeColumnMode.Fill;

                    default: // None
                        return DataGridViewAutoSizeColumnMode.None; 
                }
            } 
            return this.autoSizeMode; 
        }
 
        /// 
        public virtual int GetPreferredWidth(DataGridViewAutoSizeColumnMode autoSizeColumnMode, bool fixedHeight)
        {
            if (autoSizeColumnMode == DataGridViewAutoSizeColumnMode.NotSet || 
                autoSizeColumnMode == DataGridViewAutoSizeColumnMode.None ||
                autoSizeColumnMode == DataGridViewAutoSizeColumnMode.Fill) 
            { 
                throw new ArgumentException(SR.GetString(SR.DataGridView_NeedColumnAutoSizingCriteria, "autoSizeColumnMode"));
            } 
            switch (autoSizeColumnMode) {
                case DataGridViewAutoSizeColumnMode.NotSet:
                case DataGridViewAutoSizeColumnMode.None:
                case DataGridViewAutoSizeColumnMode.ColumnHeader: 
                case DataGridViewAutoSizeColumnMode.AllCellsExceptHeader:
                case DataGridViewAutoSizeColumnMode.AllCells: 
                case DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader: 
                case DataGridViewAutoSizeColumnMode.DisplayedCells:
                case DataGridViewAutoSizeColumnMode.Fill: 
                    break;
                default:
                    throw new InvalidEnumArgumentException("value", (int) autoSizeColumnMode, typeof(DataGridViewAutoSizeColumnMode));
             } 

            DataGridView dataGridView = this.DataGridView; 
 
            Debug.Assert(dataGridView == null || this.Index > -1);
 
            if (dataGridView == null)
            {
                return -1;
            } 

            DataGridViewAutoSizeColumnCriteriaInternal autoSizeColumnCriteriaInternal = (DataGridViewAutoSizeColumnCriteriaInternal) autoSizeColumnMode; 
            Debug.Assert(autoSizeColumnCriteriaInternal == DataGridViewAutoSizeColumnCriteriaInternal.Header || 
                autoSizeColumnCriteriaInternal == DataGridViewAutoSizeColumnCriteriaInternal.AllRows ||
                autoSizeColumnCriteriaInternal == DataGridViewAutoSizeColumnCriteriaInternal.DisplayedRows || 
                autoSizeColumnCriteriaInternal == (DataGridViewAutoSizeColumnCriteriaInternal.Header | DataGridViewAutoSizeColumnCriteriaInternal.AllRows) ||
                autoSizeColumnCriteriaInternal == (DataGridViewAutoSizeColumnCriteriaInternal.Header | DataGridViewAutoSizeColumnCriteriaInternal.DisplayedRows));

            int preferredColumnThickness = 0, preferredCellThickness, rowIndex; 
            DataGridViewRow dataGridViewRow;
            Debug.Assert(dataGridView.ColumnHeadersVisible || autoSizeColumnCriteriaInternal != DataGridViewAutoSizeColumnCriteriaInternal.Header); 
 
            // take into account the preferred width of the header cell if displayed and cared about
            if (dataGridView.ColumnHeadersVisible && 
                (autoSizeColumnCriteriaInternal & DataGridViewAutoSizeColumnCriteriaInternal.Header) != 0)
            {
                if (fixedHeight)
                { 
                    preferredCellThickness = this.HeaderCell.GetPreferredWidth(-1, dataGridView.ColumnHeadersHeight);
                } 
                else 
                {
                    preferredCellThickness = this.HeaderCell.GetPreferredSize(-1).Width; 
                }
                if (preferredColumnThickness < preferredCellThickness)
                {
                    preferredColumnThickness = preferredCellThickness; 
                }
            } 
            if ((autoSizeColumnCriteriaInternal & DataGridViewAutoSizeColumnCriteriaInternal.AllRows) != 0) 
            {
                for (rowIndex = dataGridView.Rows.GetFirstRow(DataGridViewElementStates.Visible); 
                    rowIndex != -1;
                    rowIndex = dataGridView.Rows.GetNextRow(rowIndex, DataGridViewElementStates.Visible))
                {
                    dataGridViewRow = dataGridView.Rows.SharedRow(rowIndex); 
                    if (fixedHeight)
                    { 
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredWidth(rowIndex, dataGridViewRow.Thickness); 
                    }
                    else 
                    {
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredSize(rowIndex).Width;
                    }
                    if (preferredColumnThickness < preferredCellThickness) 
                    {
                        preferredColumnThickness = preferredCellThickness; 
                    } 
                }
            } 
            else if ((autoSizeColumnCriteriaInternal & DataGridViewAutoSizeColumnCriteriaInternal.DisplayedRows) != 0)
            {
                int displayHeight = dataGridView.LayoutInfo.Data.Height;
                int cy = 0; 

                rowIndex = dataGridView.Rows.GetFirstRow(DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen); 
                while (rowIndex != -1 && cy < displayHeight) 
                {
                    dataGridViewRow = dataGridView.Rows.SharedRow(rowIndex); 
                    if (fixedHeight)
                    {
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredWidth(rowIndex, dataGridViewRow.Thickness);
                    } 
                    else
                    { 
                        preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredSize(rowIndex).Width; 
                    }
                    if (preferredColumnThickness < preferredCellThickness) 
                    {
                        preferredColumnThickness = preferredCellThickness;
                    }
                    cy += dataGridViewRow.Thickness; 
                    rowIndex = dataGridView.Rows.GetNextRow(rowIndex,
                        DataGridViewElementStates.Visible | DataGridViewElementStates.Frozen); 
                } 

                if (cy < displayHeight) 
                {
                    rowIndex = dataGridView.DisplayedBandsInfo.FirstDisplayedScrollingRow;
                    while (rowIndex != -1 && cy < displayHeight)
                    { 
                        dataGridViewRow = dataGridView.Rows.SharedRow(rowIndex);
                        if (fixedHeight) 
                        { 
                            preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredWidth(rowIndex, dataGridViewRow.Thickness);
                        } 
                        else
                        {
                            preferredCellThickness = dataGridViewRow.Cells[this.Index].GetPreferredSize(rowIndex).Width;
                        } 
                        if (preferredColumnThickness < preferredCellThickness)
                        { 
                            preferredColumnThickness = preferredCellThickness; 
                        }
                        cy += dataGridViewRow.Thickness; 
                        rowIndex = dataGridView.Rows.GetNextRow(rowIndex, DataGridViewElementStates.Visible);
                    }
                }
            } 
            return preferredColumnThickness;
        } 
 
        /// 
        public override string ToString() 
        {
            StringBuilder sb = new StringBuilder(64);
            sb.Append("DataGridViewColumn { Name=");
            sb.Append(this.Name); 
            sb.Append(", Index=");
            sb.Append(this.Index.ToString(CultureInfo.CurrentCulture)); 
            sb.Append(" }"); 
            return sb.ToString();
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

                        

                        

                        
                        

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• ExpanderAutomationPeer.cs
• MultipleViewProviderWrapper.cs
• SigningProgress.cs
• AlternateViewCollection.cs
• ShutDownListener.cs
• FieldBuilder.cs
• StringStorage.cs
• MarkupCompiler.cs
• DbConvert.cs
• EntityDesignerUtils.cs
• SimpleHandlerBuildProvider.cs
• TreeNode.cs
• CancellationHandlerDesigner.cs
• SimpleType.cs
• StrokeNodeOperations.cs
• ProcessHostServerConfig.cs
• BindingValueChangedEventArgs.cs
• EqualityComparer.cs
• AtomPub10ServiceDocumentFormatter.cs
• CharacterBufferReference.cs
• SecurityContext.cs
• UnsafeNativeMethods.cs
• Composition.cs
• FixedTextContainer.cs
• WmlCalendarAdapter.cs
• GatewayDefinition.cs
• InstanceNotReadyException.cs
• StringFreezingAttribute.cs
• ReadOnlyHierarchicalDataSource.cs
• AmbientLight.cs
• IdentityHolder.cs
• httpstaticobjectscollection.cs
• MultiPageTextView.cs
• MasterPageBuildProvider.cs
• SqlRetyper.cs
• IsolatedStorage.cs
• ZipIOLocalFileHeader.cs
• AffineTransform3D.cs
• XpsFixedDocumentSequenceReaderWriter.cs
• ZipIOLocalFileBlock.cs
• MimeParameterWriter.cs
• CompiledELinqQueryState.cs
• DbParameterCollectionHelper.cs
• WebServiceTypeData.cs
• ModelServiceImpl.cs
• AccessDataSourceView.cs
• DocumentSequenceHighlightLayer.cs
• SecurityTokenSerializer.cs
• EntityContainerRelationshipSet.cs
• ListItemCollection.cs
• CaseCqlBlock.cs
• TransformDescriptor.cs
• QualifiedCellIdBoolean.cs
• GridSplitterAutomationPeer.cs
• ConfigXmlCDataSection.cs
• ChtmlTextBoxAdapter.cs
• ExtensionQuery.cs
• ToolStripStatusLabel.cs
• Asn1Utilities.cs
• TransformConverter.cs
• ReadOnlyDataSourceView.cs
• Type.cs
• MetabaseSettings.cs
• XmlUnspecifiedAttribute.cs
• FormClosingEvent.cs
• CreateParams.cs
• SynchronousSendBindingElement.cs
• MetaDataInfo.cs
• SystemFonts.cs
• IPGlobalProperties.cs
• StylusPlugInCollection.cs
• DataTemplateSelector.cs
• HttpHandlerAction.cs
• MobileComponentEditorPage.cs
• DynamicPropertyHolder.cs
• ArrayTypeMismatchException.cs
• MetadataArtifactLoaderFile.cs
• ReliableOutputConnection.cs
• SendMailErrorEventArgs.cs
• BamlResourceDeserializer.cs
• GB18030Encoding.cs
• EditingScopeUndoUnit.cs
• TextServicesDisplayAttributePropertyRanges.cs
• ControlIdConverter.cs
• ToolStripRenderer.cs
• LicenseManager.cs
• CurrentChangedEventManager.cs
• VerticalAlignConverter.cs
• HTTPAPI_VERSION.cs
• ToolStripPanelRenderEventArgs.cs
• NodeFunctions.cs
• FilterableAttribute.cs
• DrawingServices.cs
• AlternateViewCollection.cs
• ChineseLunisolarCalendar.cs
• GeneralTransform.cs
• OdbcEnvironment.cs
• Type.cs
• Automation.cs
• HighlightComponent.cs