Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / ProxyWebPartConnectionCollection.cs / 1 / ProxyWebPartConnectionCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls.WebParts { using System; using System.Collections; using System.ComponentModel; using System.Drawing.Design; using System.Globalization; using System.Security.Permissions; using System.Web.Util; [ Editor("System.ComponentModel.Design.CollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)) ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class ProxyWebPartConnectionCollection : CollectionBase { private WebPartManager _webPartManager; public bool IsReadOnly { get { if (_webPartManager != null) { return _webPartManager.StaticConnections.IsReadOnly; } else { // This collection is never read-only before _webPartManager is set return false; } } } public WebPartConnection this[int index] { get { return (WebPartConnection)List[index]; } set { List[index] = value; } } // Returns the WebPartConnection with the specified id, performing a case-insensitive comparison. // Returns null if there are no matches. public WebPartConnection this[string id] { // PERF: Use a hashtable for lookup, instead of a linear search get { foreach (WebPartConnection connection in List) { if (connection != null && String.Equals(connection.ID, id, StringComparison.OrdinalIgnoreCase)) { return connection; } } return null; } } public int Add(WebPartConnection value) { return List.Add(value); } private void CheckReadOnly() { if (IsReadOnly) { throw new InvalidOperationException(SR.GetString(SR.ProxyWebPartConnectionCollection_ReadOnly)); } } public bool Contains(WebPartConnection value) { return List.Contains(value); } public void CopyTo(WebPartConnection[] array, int index) { List.CopyTo(array, index); } public int IndexOf(WebPartConnection value) { return List.IndexOf(value); } public void Insert(int index, WebPartConnection value) { List.Insert(index, value); } protected override void OnClear() { CheckReadOnly(); if (_webPartManager != null) { // Remove all of the connections in this collection from the main WebPartManager foreach (WebPartConnection connection in this) { _webPartManager.StaticConnections.Remove(connection); } } base.OnClear(); } protected override void OnInsert(int index, object value) { CheckReadOnly(); if (_webPartManager != null) { _webPartManager.StaticConnections.Insert(index, (WebPartConnection)value); } base.OnInsert(index, value); } protected override void OnRemove(int index, object value) { CheckReadOnly(); if (_webPartManager != null) { _webPartManager.StaticConnections.Remove((WebPartConnection)value); } base.OnRemove(index, value); } protected override void OnSet(int index, object oldValue, object newValue) { CheckReadOnly(); if (_webPartManager != null) { int webPartManagerIndex = _webPartManager.StaticConnections.IndexOf((WebPartConnection)oldValue); // It is a bug if the main WebPartManager does not contain the oldValue Debug.Assert(webPartManagerIndex >= 0); _webPartManager.StaticConnections[webPartManagerIndex] = (WebPartConnection)newValue; } base.OnSet(index, oldValue, newValue); } // Validates that an object is a WebPartConnection. protected override void OnValidate(object value) { base.OnValidate(value); if (value == null) { throw new ArgumentNullException("value", SR.GetString(SR.Collection_CantAddNull)); } if (!(value is WebPartConnection)) { throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "WebPartConnection")); } } public void Remove(WebPartConnection value) { List.Remove(value); } internal void SetWebPartManager(WebPartManager webPartManager) { // This method should only be called once in the lifetime of the ProxyWebPartConnectionCollection Debug.Assert(_webPartManager == null); Debug.Assert(webPartManager != null); _webPartManager = webPartManager; // When the _webPartManager is first set, add all the connections in this collection // to the main WebPartManager foreach (WebPartConnection connection in this) { _webPartManager.StaticConnections.Add(connection); } } } }
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