Code:
/ 4.0 / 4.0 / untmp / 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.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- TextEditorCopyPaste.cs
- WebPartAddingEventArgs.cs
- SignedXml.cs
- HealthMonitoringSection.cs
- NativeDirectoryServicesQueryAPIs.cs
- CacheMemory.cs
- CookieParameter.cs
- RuntimeConfigurationRecord.cs
- XmlNamespaceDeclarationsAttribute.cs
- Visual3D.cs
- PersistenceTypeAttribute.cs
- NodeFunctions.cs
- ViewCellSlot.cs
- Binding.cs
- DataBoundControl.cs
- DataGridViewBindingCompleteEventArgs.cs
- ValidationHelper.cs
- ViewStateException.cs
- OptimisticConcurrencyException.cs
- Page.cs
- CommonDialog.cs
- TableColumn.cs
- CustomAttributeSerializer.cs
- ControlValuePropertyAttribute.cs
- MachineKeySection.cs
- Part.cs
- SamlAudienceRestrictionCondition.cs
- DesignerActionGlyph.cs
- MailHeaderInfo.cs
- Pair.cs
- PagePropertiesChangingEventArgs.cs
- MessageSmuggler.cs
- CorePropertiesFilter.cs
- DataContractFormatAttribute.cs
- ItemList.cs
- AmbientLight.cs
- DeclarativeCatalogPart.cs
- ContainerVisual.cs
- TransformFinalBlockRequest.cs
- Propagator.Evaluator.cs
- PointAnimationUsingKeyFrames.cs
- UInt64Storage.cs
- FormViewRow.cs
- TdsValueSetter.cs
- EntityKey.cs
- XPathQueryGenerator.cs
- SafeFindHandle.cs
- Input.cs
- pingexception.cs
- OdbcFactory.cs
- GridLengthConverter.cs
- WmlPageAdapter.cs
- SectionXmlInfo.cs
- CompilerResults.cs
- QueueException.cs
- ColorConverter.cs
- Selection.cs
- MaskedTextBoxDesignerActionList.cs
- DataGridViewRowPrePaintEventArgs.cs
- CommandHelper.cs
- EntityDataSourceDesignerHelper.cs
- ValueTypeIndexerReference.cs
- PartialTrustVisibleAssembly.cs
- _NtlmClient.cs
- FtpRequestCacheValidator.cs
- Random.cs
- PrtCap_Reader.cs
- DesigntimeLicenseContextSerializer.cs
- RectangleHotSpot.cs
- OdbcConnection.cs
- Merger.cs
- Page.cs
- ThemeDirectoryCompiler.cs
- _Win32.cs
- ConsumerConnectionPointCollection.cs
- PartialClassGenerationTask.cs
- WebPartDescription.cs
- PositiveTimeSpanValidatorAttribute.cs
- TrackingMemoryStream.cs
- CodeSnippetExpression.cs
- InkPresenterAutomationPeer.cs
- MobileControlsSectionHelper.cs
- FixedTextSelectionProcessor.cs
- CancelEventArgs.cs
- MailAddress.cs
- SubstitutionDesigner.cs
- XhtmlBasicCalendarAdapter.cs
- ReferenceService.cs
- ContextMenuStripGroup.cs
- AnimationClock.cs
- CompilerTypeWithParams.cs
- DialogWindow.cs
- cache.cs
- XamlTemplateSerializer.cs
- ComponentResourceManager.cs
- ListViewDeleteEventArgs.cs
- SuppressMergeCheckAttribute.cs
- InfoCardRSACryptoProvider.cs
- TransformerTypeCollection.cs
- RegexWriter.cs