Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / 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
- ProfileSettings.cs
- ContractsBCL.cs
- Directory.cs
- HelpProvider.cs
- DataSourceDescriptorCollection.cs
- TraceHelpers.cs
- CursorConverter.cs
- IERequestCache.cs
- OuterProxyWrapper.cs
- SqlClientFactory.cs
- ContentElementCollection.cs
- TypeConverterValueSerializer.cs
- NavigationFailedEventArgs.cs
- GridViewSelectEventArgs.cs
- FlatButtonAppearance.cs
- XmlDataCollection.cs
- WpfGeneratedKnownProperties.cs
- BmpBitmapEncoder.cs
- Vector.cs
- DetailsViewUpdatedEventArgs.cs
- XmlHierarchicalDataSourceView.cs
- TypeUnloadedException.cs
- TypefaceMetricsCache.cs
- unsafenativemethodsother.cs
- MD5.cs
- _AutoWebProxyScriptWrapper.cs
- ListViewInsertionMark.cs
- EventWaitHandleSecurity.cs
- LayoutManager.cs
- MetadataUtilsSmi.cs
- mansign.cs
- Encoder.cs
- URIFormatException.cs
- RbTree.cs
- ImageList.cs
- EntityFrameworkVersions.cs
- DataShape.cs
- SQLSingle.cs
- XmlObjectSerializerReadContextComplex.cs
- BufferedGraphics.cs
- PrtTicket_Public.cs
- ValidationEventArgs.cs
- DetailsViewModeEventArgs.cs
- TextLineBreak.cs
- SuppressIldasmAttribute.cs
- ACE.cs
- MultiPageTextView.cs
- TCPClient.cs
- GridViewCellAutomationPeer.cs
- TypeConverterHelper.cs
- NumberSubstitution.cs
- TextElementEditingBehaviorAttribute.cs
- SqlProcedureAttribute.cs
- CqlGenerator.cs
- XmlTextWriter.cs
- WsiProfilesElement.cs
- XmlHierarchicalDataSourceView.cs
- FacetDescription.cs
- TypeConverterAttribute.cs
- CapabilitiesUse.cs
- PropertyGeneratedEventArgs.cs
- XmlDataImplementation.cs
- WindowsUpDown.cs
- log.cs
- SequentialOutput.cs
- AnnotationHelper.cs
- PolyLineSegment.cs
- AssemblyInfo.cs
- ToolboxItemWrapper.cs
- WebPartUserCapability.cs
- IssuedTokenServiceCredential.cs
- XhtmlMobileTextWriter.cs
- XmlSchemaSimpleContentExtension.cs
- ReflectionUtil.cs
- Unit.cs
- XslNumber.cs
- Light.cs
- TileBrush.cs
- HtmlInputReset.cs
- WebEncodingValidatorAttribute.cs
- BindToObject.cs
- ContractValidationHelper.cs
- RegionInfo.cs
- ExtentKey.cs
- DodSequenceMerge.cs
- MemoryRecordBuffer.cs
- NegotiateStream.cs
- OledbConnectionStringbuilder.cs
- XmlWhitespace.cs
- TransformPatternIdentifiers.cs
- PrincipalPermission.cs
- ReliabilityContractAttribute.cs
- QilStrConcatenator.cs
- SignatureToken.cs
- RepeatButtonAutomationPeer.cs
- TextRunCache.cs
- AVElementHelper.cs
- AttributeCollection.cs
- TypeNameHelper.cs
- WorkflowDefinitionContext.cs