DataGridViewColumnDesigner.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / DataGridViewColumnDesigner.cs / 1 / DataGridViewColumnDesigner.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 
namespace System.Windows.Forms.Design {
    using System.Design; 
    using System.ComponentModel; 
    using System.Diagnostics;
    using System; 
    using System.Collections;
    using System.Windows.Forms;
    using System.Data;
    using System.ComponentModel.Design; 
    using System.ComponentModel.Design.Serialization;
    using System.Drawing; 
    using Microsoft.Win32; 
    using System.Windows.Forms.ComponentModel;
    using System.Windows.Forms.Design.Behavior; 


    /// 
    ///  
    ///    Provides a base designer for data grid view columns.
    ///  
    internal class DataGridViewColumnDesigner : ComponentDesigner { 
        private const int DATAGRIDVIEWCOLUMN_defaultWidth = 100;
        private bool userAddedColumn = false; 
        private bool initializing;
        BehaviorService behaviorService;
        ISelectionService selectionService;
        private FilterCutCopyPasteDeleteBehavior behavior; 
        private bool behaviorPushed = false;
        private DataGridView liveDataGridView; 
 
        private string Name
        { 
            get
            {
                DataGridViewColumn col = (DataGridViewColumn) this.Component;
                if (col.Site != null) 
                {
                    return col.Site.Name; 
                } 
                else
                { 
                    return col.Name;
                }
            }
 
            set {
                if (value == null) 
                { 
                    value = String.Empty;
                } 

                DataGridViewColumn col = (DataGridViewColumn)this.Component;

                if (col == null) 
                {
                    return; 
                } 

                // Note: case sensitive because lookup inside DataGridViewColumnCollection is case sensitive. 
                if (String.Compare(value, col.Name, false, System.Globalization.CultureInfo.InvariantCulture) == 0)
                {
                    return;
                } 

                DataGridView dgv = col.DataGridView; 
 
                IDesignerHost host = null;
                IContainer container = null; 
                INameCreationService nameCreationService = null;

                if (dgv != null && dgv.Site != null)
                { 
                    host = dgv.Site.GetService(typeof(IDesignerHost)) as IDesignerHost;
                    nameCreationService = dgv.Site.GetService(typeof(INameCreationService)) as INameCreationService; 
                } 

                if (host != null) 
                {
                    container = host.Container;
                }
 
                // ValidName() checks any name conflicts on the DGV's column collection as well as any name conflicts
                // on the Container::Components collection. 
                string errorString = String.Empty; 
                if (dgv != null &&
                    !System.Windows.Forms.Design.DataGridViewAddColumnDialog.ValidName(value, 
                                                                        dgv.Columns,
                                                                        container,
                                                                        nameCreationService,
                                                                        this.liveDataGridView != null ? this.liveDataGridView.Columns : null, 
                                                                        true /*allowDuplicateNameInLiveColumnCollection*/,
                                                                        out errorString)) 
                { 
                    if (dgv != null && dgv.Site != null)
                    { 
                        IUIService uiService = (IUIService) dgv.Site.GetService(typeof(IUIService));
                        System.Windows.Forms.Design.DataGridViewDesigner.ShowErrorDialog(uiService, errorString, this.liveDataGridView);
                    }
                    return; 
                }
 
                // we are good. 
                // Set the site name if the column is sited.
                // Then set the column name. 
                if ((host == null || (host != null && !host.Loading)) && this.Component.Site != null)
                {
                    Component.Site.Name = value;
                } 

                col.Name = value; 
            } 
        }
 
        public DataGridView LiveDataGridView
        {
            set
            { 
                this.liveDataGridView = value;
            } 
        } 

        ///  
        ///     vsw 311922.
        ///     We want to add a design time only property which tracks if the user added this column or not.
        ///     Because this is a design time only property, it will be saved to *resx file.
        ///     Hence, its value will be saved from session to session. 
        ///
        ///     The property is set in ONLY one place and is used in ONLY one place. 
        /// 
        ///     This property is set ONLY the user adds a column via the data grid view add column dialog.
        ///     If columns are added as a result of binding the data grid view to a data source or as a result 
        ///     of meta data changes then they are not considered to be added by user.
        ///
        ///     This property is used ONLY by the data grid view designer when it has to decide whether or not to remove
        ///     a data bound property. 
        /// 
        private bool UserAddedColumn { 
            get { 
                return this.userAddedColumn;
            } 
            set {
                this.userAddedColumn = value;
            }
        } 

        private int Width { 
            get { 
                DataGridViewColumn col = (DataGridViewColumn)this.Component;
                return col.Width; 
            }
            set {
                DataGridViewColumn col = (DataGridViewColumn)this.Component;
                value = Math.Max(col.MinimumWidth, value); 
                col.Width = value;
            } 
        } 

        public override void Initialize(IComponent component) { 
            initializing = true;
            base.Initialize(component);

            if (component.Site != null) { 
                // Acquire a reference to ISelectionService.
                this.selectionService = 
                    GetService(typeof(ISelectionService)) 
                    as ISelectionService;
                Debug.Assert(selectionService != null); 

                // Acquire a reference to BehaviorService.
                this.behaviorService =
                    GetService(typeof(BehaviorService)) 
                    as BehaviorService;
 
                if (behaviorService != null && selectionService != null) { 
                    behavior = new FilterCutCopyPasteDeleteBehavior(true, behaviorService);
 
                    UpdateBehavior();
                    this.selectionService.SelectionChanged += new EventHandler(selectionService_SelectionChanged);
                }
            } 

            initializing = false; 
        } 

        protected override void Dispose(bool disposing) { 
            if (disposing) {
                PopBehavior();
                if (selectionService != null) {
                    this.selectionService.SelectionChanged -= new EventHandler(selectionService_SelectionChanged); 
                }
                selectionService = null; 
                behaviorService = null; 
            }
        } 

        private void PushBehavior() {
            if (!behaviorPushed) {
                Debug.Assert(behavior != null); 
                try {
                    this.behaviorService.PushBehavior(behavior); 
                } 
                finally {
                    behaviorPushed = true; 
                }
            }
        }
 
        private void PopBehavior() {
            if (behaviorPushed) { 
                Debug.Assert(behavior != null); 
                try {
                    this.behaviorService.PopBehavior(behavior); 
                }
                finally {
                    behaviorPushed = false;
                } 
            }
        } 
 
        private void UpdateBehavior() {
            if (selectionService != null ) { 
                if (selectionService.PrimarySelection != null
                        && this.Component.Equals(selectionService.PrimarySelection)) {
                    PushBehavior();
                } 
                else {
                    //ensure we are popped off 
                    PopBehavior(); 
                }
            } 
        }

        void selectionService_SelectionChanged(object sender, EventArgs e) {
            UpdateBehavior(); 
        }
 
        protected override void PreFilterProperties(IDictionary properties) { 
            base.PreFilterProperties(properties);
 
            PropertyDescriptor prop = (PropertyDescriptor)properties["Width"];
            if (prop != null) {
                properties["Width"] = TypeDescriptor.CreateProperty(typeof(DataGridViewColumnDesigner), prop, new Attribute[0]);
            } 

            prop = (PropertyDescriptor)properties["Name"]; 
            if (prop != null) { 
                if (this.Component.Site == null) {
                    // When the Site is not null the Extender provider will add the (Name) property. 
                    // However, when columns are on the data grid view column collection editor, the site is null.
                    // In that case we have to make the (Name) property browsable true.
                    properties["Name"] = TypeDescriptor.CreateProperty(typeof(DataGridViewColumnDesigner),
                                         prop, 
                                         BrowsableAttribute.Yes,
                                         CategoryAttribute.Design, 
                                         new DescriptionAttribute(SR.GetString(SR.DesignerPropName)), 
                                         new ParenthesizePropertyNameAttribute(true));
                } 
                else {
                    // When the column is sited use DataGridViewColumnDesigner::Name property
                    // so it can use the Name validation logic specific to DataGridViewColumnCollection.
                    properties["Name"] = TypeDescriptor.CreateProperty(typeof(DataGridViewColumnDesigner), 
                                         prop,
                                         new ParenthesizePropertyNameAttribute(true)); 
                } 
            }
 

            // Add the UserAddedColumn design time only property.
            properties["UserAddedColumn"] = TypeDescriptor.CreateProperty(typeof(DataGridViewColumnDesigner), "UserAddedColumn", typeof(bool),
                                            new DefaultValueAttribute(false), 
                                            BrowsableAttribute.No,
                                            DesignOnlyAttribute.Yes); 
        } 

        private bool ShouldSerializeWidth() { 
            DataGridViewColumn col = (DataGridViewColumn)this.Component;
            return col.InheritedAutoSizeMode != DataGridViewAutoSizeColumnMode.Fill && col.Width != DATAGRIDVIEWCOLUMN_defaultWidth;
        }
 
        private bool ShouldSerializeName() {
            IDesignerHost host = (IDesignerHost)GetService(typeof(IDesignerHost)); 
            if (host == null) { 
                // The column is hosted in the column collection dialog.
                // Return false : let the user type whatever he feels like. 
                return false;
            }

            return initializing ? (Component != host.RootComponent)  //for non root components, respect the name that the base Control serialized unless changed 
                : ShadowProperties.ShouldSerializeValue("Name", null);
        } 
 
        public class FilterCutCopyPasteDeleteBehavior : System.Windows.Forms.Design.Behavior.Behavior {
            public FilterCutCopyPasteDeleteBehavior(bool callParentBehavior, BehaviorService behaviorService) : base(callParentBehavior, behaviorService) { } 

            public override MenuCommand FindCommand(CommandID commandId) {
                MenuCommand command;
                if ((commandId.ID == StandardCommands.Copy.ID) && (commandId.Guid == StandardCommands.Copy.Guid)) { 
                    command = new MenuCommand(new EventHandler(this.handler), StandardCommands.Copy);
                    command.Enabled = false; 
 
                    return command;
                } 

                if ((commandId.ID == StandardCommands.Paste.ID) && (commandId.Guid == StandardCommands.Paste.Guid)) {
                    command = new MenuCommand(new EventHandler(this.handler), StandardCommands.Paste);
                    command.Enabled = false; 

                    return command; 
                } 

                if ((commandId.ID == StandardCommands.Delete.ID) && (commandId.Guid == StandardCommands.Delete.Guid)) { 
                    command = new MenuCommand(new EventHandler(this.handler), StandardCommands.Delete);
                    command.Enabled = false;

                    return command; 
                }
 
                if ((commandId.ID == StandardCommands.Cut.ID) && (commandId.Guid == StandardCommands.Cut.Guid)) { 
                    command = new MenuCommand(new EventHandler(this.handler), StandardCommands.Cut);
                    command.Enabled = false; 

                    return command;
                }
 
                return base.FindCommand(commandId);
            } 
 
            private void handler(object sender, EventArgs e) { }
        } 

    }
}

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

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK