Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / Data / System / Data / DataViewListener.cs / 1 / DataViewListener.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data { using System; using System.ComponentModel; using System.Collections.Generic; using System.Diagnostics; internal sealed class DataViewListener { private readonly WeakReference _dvWeak; private DataTable _table; private Index _index; ///internal readonly int ObjectID; internal DataViewListener(DataView dv) { this.ObjectID = dv.ObjectID; _dvWeak = new WeakReference(dv); } private void ChildRelationCollectionChanged(object sender, CollectionChangeEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.ChildRelationCollectionChanged(sender, e); } else { CleanUp(true); } } private void ParentRelationCollectionChanged(object sender, CollectionChangeEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.ParentRelationCollectionChanged(sender, e); } else { CleanUp(true); } } private void ColumnCollectionChanged(object sender, CollectionChangeEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.ColumnCollectionChangedInternal(sender, e); } else { CleanUp(true); } } /// /// Maintain the DataView before internal void MaintainDataView(ListChangedType changedType, DataRow row, bool trackAddRemove) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.MaintainDataView(changedType, row, trackAddRemove); } else { CleanUp(true); } } internal void IndexListChanged(ListChangedEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.IndexListChangedInternal(e); } else { CleanUp(true); } } internal void RegisterMetaDataEvents(DataTable table) { Debug.Assert(null == _table, "DataViewListener already registered table"); _table = table; if (table != null) { // actively remove listeners without a target RegisterListener(table); // start listening to events CollectionChangeEventHandler handlerCollection = new CollectionChangeEventHandler(ColumnCollectionChanged); table.Columns.ColumnPropertyChanged += handlerCollection; table.Columns.CollectionChanged += handlerCollection; CollectionChangeEventHandler handlerChildRelation = new CollectionChangeEventHandler(ChildRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ChildRelations)).RelationPropertyChanged += handlerChildRelation; table.ChildRelations.CollectionChanged += handlerChildRelation; CollectionChangeEventHandler handlerParentRelation = new CollectionChangeEventHandler(ParentRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ParentRelations)).RelationPropertyChanged += handlerParentRelation; table.ParentRelations.CollectionChanged += handlerParentRelation; } } internal void UnregisterMetaDataEvents() { UnregisterMetaDataEvents(true); } private void UnregisterMetaDataEvents(bool updateListeners) { DataTable table = _table; _table = null; if (table != null) { CollectionChangeEventHandler handlerCollection = new CollectionChangeEventHandler(ColumnCollectionChanged); table.Columns.ColumnPropertyChanged -= handlerCollection; table.Columns.CollectionChanged -= handlerCollection; CollectionChangeEventHandler handlerChildRelation = new CollectionChangeEventHandler(ChildRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ChildRelations)).RelationPropertyChanged -= handlerChildRelation; table.ChildRelations.CollectionChanged -= handlerChildRelation; CollectionChangeEventHandler handlerParentRelation = new CollectionChangeEventHandler(ParentRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ParentRelations)).RelationPropertyChanged -= handlerParentRelation; table.ParentRelations.CollectionChanged -= handlerParentRelation; if (updateListeners) { Listis raised. /// listeners = table.GetListeners(); lock (listeners) { listeners.Remove(this); } } } } internal void RegisterListChangedEvent(Index index) { Debug.Assert(null == _index, "DataviewListener already registered index"); _index = index; if (null != index) { lock (index) { index.AddRef(); index.ListChangedAdd(this); } } } internal void UnregisterListChangedEvent() { Index index = _index; _index = null; if (index != null) { lock (index) { index.ListChangedRemove(this); if (index.RemoveRef() <= 1) { index.RemoveRef(); } } } } private void CleanUp(bool updateListeners) { UnregisterMetaDataEvents(updateListeners); UnregisterListChangedEvent(); } private void RegisterListener(DataTable table) { List listeners = table.GetListeners(); lock (listeners) { for (int i = listeners.Count - 1; 0 <= i; --i) { DataViewListener listener = listeners[i]; if (!listener._dvWeak.IsAlive) { listeners.RemoveAt(i); listener.CleanUp(false); } } listeners.Add(this); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- namespace System.Data { using System; using System.ComponentModel; using System.Collections.Generic; using System.Diagnostics; internal sealed class DataViewListener { private readonly WeakReference _dvWeak; private DataTable _table; private Index _index; ///internal readonly int ObjectID; internal DataViewListener(DataView dv) { this.ObjectID = dv.ObjectID; _dvWeak = new WeakReference(dv); } private void ChildRelationCollectionChanged(object sender, CollectionChangeEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.ChildRelationCollectionChanged(sender, e); } else { CleanUp(true); } } private void ParentRelationCollectionChanged(object sender, CollectionChangeEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.ParentRelationCollectionChanged(sender, e); } else { CleanUp(true); } } private void ColumnCollectionChanged(object sender, CollectionChangeEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.ColumnCollectionChangedInternal(sender, e); } else { CleanUp(true); } } /// /// Maintain the DataView before internal void MaintainDataView(ListChangedType changedType, DataRow row, bool trackAddRemove) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.MaintainDataView(changedType, row, trackAddRemove); } else { CleanUp(true); } } internal void IndexListChanged(ListChangedEventArgs e) { DataView dv = (DataView)_dvWeak.Target; if (dv != null) { dv.IndexListChangedInternal(e); } else { CleanUp(true); } } internal void RegisterMetaDataEvents(DataTable table) { Debug.Assert(null == _table, "DataViewListener already registered table"); _table = table; if (table != null) { // actively remove listeners without a target RegisterListener(table); // start listening to events CollectionChangeEventHandler handlerCollection = new CollectionChangeEventHandler(ColumnCollectionChanged); table.Columns.ColumnPropertyChanged += handlerCollection; table.Columns.CollectionChanged += handlerCollection; CollectionChangeEventHandler handlerChildRelation = new CollectionChangeEventHandler(ChildRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ChildRelations)).RelationPropertyChanged += handlerChildRelation; table.ChildRelations.CollectionChanged += handlerChildRelation; CollectionChangeEventHandler handlerParentRelation = new CollectionChangeEventHandler(ParentRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ParentRelations)).RelationPropertyChanged += handlerParentRelation; table.ParentRelations.CollectionChanged += handlerParentRelation; } } internal void UnregisterMetaDataEvents() { UnregisterMetaDataEvents(true); } private void UnregisterMetaDataEvents(bool updateListeners) { DataTable table = _table; _table = null; if (table != null) { CollectionChangeEventHandler handlerCollection = new CollectionChangeEventHandler(ColumnCollectionChanged); table.Columns.ColumnPropertyChanged -= handlerCollection; table.Columns.CollectionChanged -= handlerCollection; CollectionChangeEventHandler handlerChildRelation = new CollectionChangeEventHandler(ChildRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ChildRelations)).RelationPropertyChanged -= handlerChildRelation; table.ChildRelations.CollectionChanged -= handlerChildRelation; CollectionChangeEventHandler handlerParentRelation = new CollectionChangeEventHandler(ParentRelationCollectionChanged); ((DataRelationCollection.DataTableRelationCollection)(table.ParentRelations)).RelationPropertyChanged -= handlerParentRelation; table.ParentRelations.CollectionChanged -= handlerParentRelation; if (updateListeners) { Listis raised. /// listeners = table.GetListeners(); lock (listeners) { listeners.Remove(this); } } } } internal void RegisterListChangedEvent(Index index) { Debug.Assert(null == _index, "DataviewListener already registered index"); _index = index; if (null != index) { lock (index) { index.AddRef(); index.ListChangedAdd(this); } } } internal void UnregisterListChangedEvent() { Index index = _index; _index = null; if (index != null) { lock (index) { index.ListChangedRemove(this); if (index.RemoveRef() <= 1) { index.RemoveRef(); } } } } private void CleanUp(bool updateListeners) { UnregisterMetaDataEvents(updateListeners); UnregisterListChangedEvent(); } private void RegisterListener(DataTable table) { List listeners = table.GetListeners(); lock (listeners) { for (int i = listeners.Count - 1; 0 <= i; --i) { DataViewListener listener = listeners[i]; if (!listener._dvWeak.IsAlive) { listeners.RemoveAt(i); listener.CleanUp(false); } } listeners.Add(this); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CultureData.cs
- BufferBuilder.cs
- DefaultPropertyAttribute.cs
- TextRange.cs
- XPathPatternBuilder.cs
- MobileTemplatedControlDesigner.cs
- DrawListViewItemEventArgs.cs
- WebPartVerb.cs
- DbConnectionPool.cs
- ValidationErrorInfo.cs
- SequentialUshortCollection.cs
- ServicesUtilities.cs
- EntityDataSourceContainerNameItem.cs
- WorkflowRuntimeEndpoint.cs
- _Connection.cs
- ForeignKeyConstraint.cs
- CroppedBitmap.cs
- ContentDisposition.cs
- FileVersion.cs
- Claim.cs
- DomainUpDown.cs
- ConfigurationFileMap.cs
- RemoteHelper.cs
- WebControl.cs
- TagMapInfo.cs
- ConstantExpression.cs
- HandlerMappingMemo.cs
- StringExpressionSet.cs
- SqlProfileProvider.cs
- NetworkInterface.cs
- PropertiesTab.cs
- DesignTimeParseData.cs
- WebBrowserProgressChangedEventHandler.cs
- BroadcastEventHelper.cs
- NavigationCommands.cs
- SafeEventLogReadHandle.cs
- ZipArchive.cs
- GridItemPatternIdentifiers.cs
- TextElementEnumerator.cs
- EdmMember.cs
- DbConnectionInternal.cs
- ApplicationServiceHelper.cs
- CheckBoxBaseAdapter.cs
- BindableAttribute.cs
- IConvertible.cs
- XmlDocumentSchema.cs
- TdsParserStateObject.cs
- ScrollItemProviderWrapper.cs
- WmlMobileTextWriter.cs
- CharacterMetrics.cs
- BuiltInExpr.cs
- WebPartDisplayModeEventArgs.cs
- OleDbRowUpdatedEvent.cs
- MDIClient.cs
- PropertyNames.cs
- EntityDataSourceEntityTypeFilterConverter.cs
- AccessedThroughPropertyAttribute.cs
- HtmlForm.cs
- BadImageFormatException.cs
- DrawingCollection.cs
- QueryableDataSourceView.cs
- GridViewColumnHeaderAutomationPeer.cs
- SerializationFieldInfo.cs
- ToolStripButton.cs
- ApplicationDirectoryMembershipCondition.cs
- UrlAuthorizationModule.cs
- FormViewUpdateEventArgs.cs
- DesignerMetadata.cs
- BindingManagerDataErrorEventArgs.cs
- XmlDataContract.cs
- MeasurementDCInfo.cs
- HtmlGenericControl.cs
- CookielessHelper.cs
- PrintingPermissionAttribute.cs
- SystemWebSectionGroup.cs
- ClientBuildManagerCallback.cs
- FreeFormDesigner.cs
- SynchronousChannelMergeEnumerator.cs
- Dynamic.cs
- XmlNodeList.cs
- FlowDocumentView.cs
- PagedDataSource.cs
- TheQuery.cs
- EntityObject.cs
- WorkflowDispatchContext.cs
- TraceHandlerErrorFormatter.cs
- RelationshipConverter.cs
- FrameworkElementFactoryMarkupObject.cs
- CodeArrayIndexerExpression.cs
- PassportIdentity.cs
- ToolStripSystemRenderer.cs
- TdsRecordBufferSetter.cs
- DBConnection.cs
- InstanceCreationEditor.cs
- FixedSOMContainer.cs
- UidManager.cs
- Journal.cs
- DataGridItemEventArgs.cs
- DBCommand.cs
- DeferrableContentConverter.cs