DataViewSettingCollection.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / DataViewSettingCollection.cs / 1 / DataViewSettingCollection.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 

namespace System.Data { 
    using System;
    using System.Diagnostics;
    using System.ComponentModel;
    using System.Collections; 

    [ 
    Editor("Microsoft.VSDesigner.Data.Design.DataViewSettingsCollectionEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing), 
    ]
#if WINFSInternalOnly 
    internal
#else
    public
#endif 
    class DataViewSettingCollection : ICollection {
        private readonly DataViewManager dataViewManager; 
        private readonly Hashtable list = new Hashtable(); 

        internal DataViewSettingCollection(DataViewManager dataViewManager) { 
            if (dataViewManager == null) {
                throw ExceptionBuilder.ArgumentNull("dataViewManager");
            }
            this.dataViewManager = dataViewManager; 
        }
 
        public virtual DataViewSetting this[DataTable table] { 
            get {
                if (table == null) { 
                    throw ExceptionBuilder.ArgumentNull("table");
                }
                DataViewSetting dataViewSetting = (DataViewSetting) list[table];
                if(dataViewSetting == null) { 
                    dataViewSetting = new DataViewSetting();
                    this[table] = dataViewSetting; 
                } 
                return dataViewSetting;
            } 
            set {
                if (table == null) {
                    throw ExceptionBuilder.ArgumentNull("table");
                } 
                value.SetDataViewManager(dataViewManager);
                value.SetDataTable(table); 
                list[table] = value; 
            }
        } 

        private DataTable GetTable(string tableName) {
            DataTable dt = null;
            DataSet ds = dataViewManager.DataSet; 
            if(ds != null) {
                dt = ds.Tables[tableName]; 
            } 
            return dt;
        } 

        private DataTable GetTable(int index) {
            DataTable dt = null;
            DataSet ds = dataViewManager.DataSet; 
            if(ds != null) {
                dt = ds.Tables[index]; 
            } 
            return dt;
        } 

        public virtual DataViewSetting this[string tableName] {
            get {
                DataTable dt = GetTable(tableName); 
                if(dt != null) {
                    return this[dt]; 
                } 
                return null;
            } 
        }

        public virtual DataViewSetting this[int index] {
            get { 
                DataTable dt = GetTable(index);
                if(dt != null) { 
                    return this[dt]; 
                }
                return null; 
            }
            set {
                DataTable dt = GetTable(index);
                if(dt != null) { 
                    this[dt] = value;
                }else { 
                    // throw excaption here. 
                }
            } 
        }

        // ----------- ICollection -------------------------
        public void CopyTo(Array ar, int index) { 
            System.Collections.IEnumerator Enumerator = GetEnumerator();
            while (Enumerator.MoveNext()) { 
                ar.SetValue(Enumerator.Current, index++); 
            }
        } 

        public void CopyTo(DataViewSetting[] ar, int index) {
            System.Collections.IEnumerator Enumerator = GetEnumerator();
            while (Enumerator.MoveNext()) { 
                ar.SetValue(Enumerator.Current, index++);
            } 
        } 

        [Browsable(false)] 
        public virtual int Count {
            get {
                DataSet ds = dataViewManager.DataSet;
                return (ds == null) ? 0 : ds.Tables.Count; 
            }
        } 
 
        public IEnumerator GetEnumerator() {
            // I have to do something here. 
            return new DataViewSettingsEnumerator(dataViewManager);
        }

        [ 
        Browsable(false)
        ] 
        public bool IsReadOnly { 
            get {
                return true; 
            }
        }

        [Browsable(false)] 
        public bool IsSynchronized {
            get { 
                // so the user will know that it has to lock this object 
                return false;
            } 
        }

        [Browsable(false)]
        public object SyncRoot { 
            get {
                return this; 
            } 
        }
 
        internal void Remove(DataTable table) {
            list.Remove(table);
        }
 
        private sealed class DataViewSettingsEnumerator : IEnumerator {
            DataViewSettingCollection dataViewSettings; 
            IEnumerator                tableEnumerator; 
            public DataViewSettingsEnumerator(DataViewManager dvm) {
                DataSet ds = dvm.DataSet; 
                if(ds != null) {
                    dataViewSettings = dvm.DataViewSettings;
                    tableEnumerator  = dvm.DataSet.Tables.GetEnumerator();
                }else { 
                    dataViewSettings = null;
                    tableEnumerator  = DataSet.zeroTables.GetEnumerator(); 
                } 
            }
            public bool MoveNext() { 
                return tableEnumerator.MoveNext();
            }
            public void Reset() {
                tableEnumerator.Reset(); 
            }
            public object Current { 
                get { 
                    return dataViewSettings[(DataTable) tableEnumerator.Current];
                } 
            }
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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DataViewSettingCollection.cs source code in C# .NET

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