Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Collections / DictionaryBase.cs / 1305376 / DictionaryBase.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //------------------------------------------------------------------------------ //----------------------------------------------------------------------------- //[....] // namespace System.Collections { using System; using System.Security.Permissions; // Useful base class for typed read/write collections where items derive from object [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class DictionaryBase : IDictionary { Hashtable hashtable; protected Hashtable InnerHashtable { get { if (hashtable == null) hashtable = new Hashtable(); return hashtable; } } protected IDictionary Dictionary { get { return (IDictionary) this; } } public int Count { // to avoid newing inner list if no items are ever added get { return hashtable == null ? 0 : hashtable.Count; } } bool IDictionary.IsReadOnly { get { return InnerHashtable.IsReadOnly; } } bool IDictionary.IsFixedSize { get { return InnerHashtable.IsFixedSize; } } bool ICollection.IsSynchronized { get { return InnerHashtable.IsSynchronized; } } ICollection IDictionary.Keys { get { return InnerHashtable.Keys; } } Object ICollection.SyncRoot { get { return InnerHashtable.SyncRoot; } } ICollection IDictionary.Values { get { return InnerHashtable.Values; } } public void CopyTo(Array array, int index) { InnerHashtable.CopyTo(array, index); } object IDictionary.this[object key] { get { object currentValue = InnerHashtable[key]; OnGet(key, currentValue); return currentValue; } set { OnValidate(key, value); bool keyExists = true; Object temp = InnerHashtable[key]; if( temp == null) { keyExists = InnerHashtable.Contains(key); } OnSet(key, temp, value); InnerHashtable[key] = value; try { OnSetComplete(key, temp, value); } catch { if( keyExists) { InnerHashtable[key] = temp; } else { InnerHashtable.Remove(key); } throw; } } } bool IDictionary.Contains(object key) { return InnerHashtable.Contains(key); } void IDictionary.Add(object key, object value) { OnValidate(key, value); OnInsert(key, value); InnerHashtable.Add(key, value); try { OnInsertComplete(key, value); } catch { InnerHashtable.Remove(key); throw; } } public void Clear() { OnClear(); InnerHashtable.Clear(); OnClearComplete(); } void IDictionary.Remove(object key) { if(InnerHashtable.Contains(key)) { Object temp = InnerHashtable[key]; OnValidate(key, temp); OnRemove(key, temp); InnerHashtable.Remove(key); try { OnRemoveComplete(key, temp); } catch { InnerHashtable.Add(key, temp); throw; } } } public IDictionaryEnumerator GetEnumerator() { return InnerHashtable.GetEnumerator(); } IEnumerator IEnumerable.GetEnumerator() { return InnerHashtable.GetEnumerator(); } protected virtual object OnGet(object key, object currentValue) { return currentValue; } protected virtual void OnSet(object key, object oldValue, object newValue) { } protected virtual void OnInsert(object key, object value) { } protected virtual void OnClear() { } protected virtual void OnRemove(object key, object value) { } protected virtual void OnValidate(object key, object value) { } protected virtual void OnSetComplete(object key, object oldValue, object newValue) { } protected virtual void OnInsertComplete(object key, object value) { } protected virtual void OnClearComplete() { } protected virtual void OnRemoveComplete(object key, object value) { } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //------------------------------------------------------------------------------ //----------------------------------------------------------------------------- //[....] // namespace System.Collections { using System; using System.Security.Permissions; // Useful base class for typed read/write collections where items derive from object [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public abstract class DictionaryBase : IDictionary { Hashtable hashtable; protected Hashtable InnerHashtable { get { if (hashtable == null) hashtable = new Hashtable(); return hashtable; } } protected IDictionary Dictionary { get { return (IDictionary) this; } } public int Count { // to avoid newing inner list if no items are ever added get { return hashtable == null ? 0 : hashtable.Count; } } bool IDictionary.IsReadOnly { get { return InnerHashtable.IsReadOnly; } } bool IDictionary.IsFixedSize { get { return InnerHashtable.IsFixedSize; } } bool ICollection.IsSynchronized { get { return InnerHashtable.IsSynchronized; } } ICollection IDictionary.Keys { get { return InnerHashtable.Keys; } } Object ICollection.SyncRoot { get { return InnerHashtable.SyncRoot; } } ICollection IDictionary.Values { get { return InnerHashtable.Values; } } public void CopyTo(Array array, int index) { InnerHashtable.CopyTo(array, index); } object IDictionary.this[object key] { get { object currentValue = InnerHashtable[key]; OnGet(key, currentValue); return currentValue; } set { OnValidate(key, value); bool keyExists = true; Object temp = InnerHashtable[key]; if( temp == null) { keyExists = InnerHashtable.Contains(key); } OnSet(key, temp, value); InnerHashtable[key] = value; try { OnSetComplete(key, temp, value); } catch { if( keyExists) { InnerHashtable[key] = temp; } else { InnerHashtable.Remove(key); } throw; } } } bool IDictionary.Contains(object key) { return InnerHashtable.Contains(key); } void IDictionary.Add(object key, object value) { OnValidate(key, value); OnInsert(key, value); InnerHashtable.Add(key, value); try { OnInsertComplete(key, value); } catch { InnerHashtable.Remove(key); throw; } } public void Clear() { OnClear(); InnerHashtable.Clear(); OnClearComplete(); } void IDictionary.Remove(object key) { if(InnerHashtable.Contains(key)) { Object temp = InnerHashtable[key]; OnValidate(key, temp); OnRemove(key, temp); InnerHashtable.Remove(key); try { OnRemoveComplete(key, temp); } catch { InnerHashtable.Add(key, temp); throw; } } } public IDictionaryEnumerator GetEnumerator() { return InnerHashtable.GetEnumerator(); } IEnumerator IEnumerable.GetEnumerator() { return InnerHashtable.GetEnumerator(); } protected virtual object OnGet(object key, object currentValue) { return currentValue; } protected virtual void OnSet(object key, object oldValue, object newValue) { } protected virtual void OnInsert(object key, object value) { } protected virtual void OnClear() { } protected virtual void OnRemove(object key, object value) { } protected virtual void OnValidate(object key, object value) { } protected virtual void OnSetComplete(object key, object oldValue, object newValue) { } protected virtual void OnInsertComplete(object key, object value) { } protected virtual void OnClearComplete() { } protected virtual void OnRemoveComplete(object key, object value) { } } } // 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
- DataListItemEventArgs.cs
- GridViewCellAutomationPeer.cs
- COM2EnumConverter.cs
- PrintDialog.cs
- JpegBitmapDecoder.cs
- InfiniteIntConverter.cs
- TwoPhaseCommitProxy.cs
- OptimisticConcurrencyException.cs
- SupportingTokenDuplexChannel.cs
- ClientEventManager.cs
- TableItemProviderWrapper.cs
- HttpResponse.cs
- CompilerTypeWithParams.cs
- SqlConnectionFactory.cs
- ControllableStoryboardAction.cs
- CompoundFileStreamReference.cs
- ResXFileRef.cs
- XmlSerializerFaultFormatter.cs
- ListViewInsertedEventArgs.cs
- LongValidatorAttribute.cs
- EntityException.cs
- FamilyTypeface.cs
- Freezable.cs
- MailWebEventProvider.cs
- FactoryRecord.cs
- DrawingGroup.cs
- PropertyNames.cs
- ColumnBinding.cs
- AuthenticationException.cs
- FormsAuthenticationEventArgs.cs
- SQLDecimalStorage.cs
- ValidationErrorCollection.cs
- WebPartConnectionsConnectVerb.cs
- MergeLocalizationDirectives.cs
- Stopwatch.cs
- DesignerSerializationVisibilityAttribute.cs
- DataBinder.cs
- DocumentScope.cs
- Unit.cs
- Geometry3D.cs
- PropertyGridEditorPart.cs
- SelectionUIService.cs
- ResourceAttributes.cs
- RedistVersionInfo.cs
- XamlReader.cs
- StrongName.cs
- SigningProgress.cs
- BindingWorker.cs
- InkCanvas.cs
- Ray3DHitTestResult.cs
- FtpWebRequest.cs
- XmlObjectSerializerWriteContext.cs
- GridPattern.cs
- SignedPkcs7.cs
- CompilationUnit.cs
- ProgressBar.cs
- ImmutableCommunicationTimeouts.cs
- BuildTopDownAttribute.cs
- FactoryGenerator.cs
- FacetDescriptionElement.cs
- EntityException.cs
- versioninfo.cs
- GroupBoxAutomationPeer.cs
- ToolboxItemWrapper.cs
- CounterCreationData.cs
- XmlQueryType.cs
- ApplicationFileParser.cs
- SqlEnums.cs
- QilUnary.cs
- DataGridViewCellContextMenuStripNeededEventArgs.cs
- UriExt.cs
- BuildManager.cs
- Line.cs
- WebPartConnectionsConnectVerb.cs
- PtsPage.cs
- ContainerActivationHelper.cs
- DoubleLink.cs
- CompilerError.cs
- PenContext.cs
- MissingMethodException.cs
- DocumentEventArgs.cs
- WebPartMenu.cs
- ProgressBar.cs
- AmbientValueAttribute.cs
- UpdateManifestForBrowserApplication.cs
- DefaultTraceListener.cs
- CodeMethodReturnStatement.cs
- PeerApplication.cs
- propertytag.cs
- FileUtil.cs
- SequentialWorkflowHeaderFooter.cs
- FacetDescription.cs
- RSAPKCS1SignatureFormatter.cs
- CasesDictionary.cs
- SqlCharStream.cs
- IERequestCache.cs
- BindingSource.cs
- GradientStop.cs
- EntityWithChangeTrackerStrategy.cs
- FunctionDetailsReader.cs