Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Collections / DictionaryBase.cs / 1 / 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
- DBSqlParserTable.cs
- Metafile.cs
- XPathNavigator.cs
- WindowsRichEdit.cs
- MobileComponentEditorPage.cs
- IdentitySection.cs
- ScrollableControl.cs
- TempFiles.cs
- NavigationCommands.cs
- Function.cs
- XamlPoint3DCollectionSerializer.cs
- SQLBoolean.cs
- EntityDataSourceEntityTypeFilterItem.cs
- XmlAnyElementAttributes.cs
- WebScriptMetadataMessageEncodingBindingElement.cs
- XPathSelfQuery.cs
- TextTreeUndoUnit.cs
- CatalogZoneDesigner.cs
- KeySpline.cs
- TransformValueSerializer.cs
- NativeMethods.cs
- OLEDB_Enum.cs
- DocumentPageViewAutomationPeer.cs
- Constants.cs
- XmlIterators.cs
- DataTransferEventArgs.cs
- ServiceOperation.cs
- EventLogPropertySelector.cs
- DocumentAutomationPeer.cs
- ParamArrayAttribute.cs
- CapabilitiesAssignment.cs
- IdentifierService.cs
- InputBinding.cs
- fixedPageContentExtractor.cs
- HttpHandlersSection.cs
- listitem.cs
- HttpPostProtocolReflector.cs
- CallbackHandler.cs
- PersistenceTask.cs
- SqlPersonalizationProvider.cs
- CellTreeNodeVisitors.cs
- HierarchicalDataTemplate.cs
- MailAddress.cs
- DesignerTextViewAdapter.cs
- SystemIPv6InterfaceProperties.cs
- ListViewContainer.cs
- CreateUserWizardDesigner.cs
- QueryReaderSettings.cs
- Parser.cs
- TypeDependencyAttribute.cs
- DeobfuscatingStream.cs
- ListSourceHelper.cs
- HuffCodec.cs
- ISAPIWorkerRequest.cs
- TickBar.cs
- EnvelopedSignatureTransform.cs
- CodeDomLocalizationProvider.cs
- WebPartExportVerb.cs
- InheritanceAttribute.cs
- DragEvent.cs
- FileInfo.cs
- CompositionTarget.cs
- WSDualHttpBinding.cs
- SQLResource.cs
- MobileControlPersister.cs
- PostBackOptions.cs
- HMACRIPEMD160.cs
- HelpInfo.cs
- LOSFormatter.cs
- XmlParserContext.cs
- DictionaryEntry.cs
- EnumConverter.cs
- PropertyValue.cs
- BamlLocalizationDictionary.cs
- InitiatorSessionSymmetricMessageSecurityProtocol.cs
- OperationGenerator.cs
- SafeIUnknown.cs
- XPathParser.cs
- ScriptingProfileServiceSection.cs
- DataSourceProvider.cs
- IntegerValidatorAttribute.cs
- dataSvcMapFileLoader.cs
- SiteMapNode.cs
- FrameDimension.cs
- RegexRunner.cs
- IdnElement.cs
- InputProcessorProfiles.cs
- DLinqAssociationProvider.cs
- ProgressBar.cs
- XPathNavigatorKeyComparer.cs
- ValueExpressions.cs
- MenuBase.cs
- GraphicsContainer.cs
- DataDocumentXPathNavigator.cs
- StylusButtonEventArgs.cs
- ConfigurationManager.cs
- PackageDigitalSignature.cs
- AxisAngleRotation3D.cs
- IndexedString.cs
- KeysConverter.cs