Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Collections / ObjectModel / KeyedCollection.cs / 1 / KeyedCollection.cs
namespace System.Collections.ObjectModel { using System; using System.Collections.Generic; using System.Diagnostics; [Serializable()] [System.Runtime.InteropServices.ComVisible(false)] [DebuggerTypeProxy(typeof(Mscorlib_KeyedCollectionDebugView<,>))] [DebuggerDisplay("Count = {Count}")] public abstract class KeyedCollection: Collection { const int defaultThreshold = 0; IEqualityComparer comparer; Dictionary dict; int keyCount; int threshold; protected KeyedCollection(): this(null, defaultThreshold) {} protected KeyedCollection(IEqualityComparer comparer): this(comparer, defaultThreshold) {} protected KeyedCollection(IEqualityComparer comparer, int dictionaryCreationThreshold) { if (comparer == null) { comparer = EqualityComparer .Default; } if (dictionaryCreationThreshold == -1) { dictionaryCreationThreshold = int.MaxValue; } if( dictionaryCreationThreshold < -1) { ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.dictionaryCreationThreshold, ExceptionResource.ArgumentOutOfRange_InvalidThreshold); } this.comparer = comparer; this.threshold = dictionaryCreationThreshold; } public IEqualityComparer Comparer { get { return comparer; } } public TItem this[TKey key] { get { if( key == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key); } if (dict != null) { return dict[key]; } foreach (TItem item in Items) { if (comparer.Equals(GetKeyForItem(item), key)) return item; } ThrowHelper.ThrowKeyNotFoundException(); return default(TItem); } } public bool Contains(TKey key) { if( key == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key); } if (dict != null) { return dict.ContainsKey(key); } if (key != null) { foreach (TItem item in Items) { if (comparer.Equals(GetKeyForItem(item), key)) return true; } } return false; } private bool ContainsItem(TItem item) { TKey key; if( (dict == null) || ((key = GetKeyForItem(item)) == null)) { return Items.Contains(item); } TItem itemInDict; bool exist = dict.TryGetValue(key, out itemInDict); if( exist) { return EqualityComparer .Default.Equals(itemInDict, item); } return false; } public bool Remove(TKey key) { if( key == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key); } if (dict != null) { if (dict.ContainsKey(key)) { return Remove(dict[key]); } return false; } if (key != null) { for (int i = 0; i < Items.Count; i++) { if (comparer.Equals(GetKeyForItem(Items[i]), key)) { RemoveItem(i); return true; } } } return false; } protected IDictionary Dictionary { get { return dict; } } protected void ChangeItemKey(TItem item, TKey newKey) { // check if the item exists in the collection if( !ContainsItem(item)) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_ItemNotExist); } TKey oldKey = GetKeyForItem(item); if (!comparer.Equals(oldKey, newKey)) { if (newKey != null) { AddKey(newKey, item); } if (oldKey != null) { RemoveKey(oldKey); } } } protected override void ClearItems() { base.ClearItems(); if (dict != null) { dict.Clear(); } keyCount = 0; } protected abstract TKey GetKeyForItem(TItem item); protected override void InsertItem(int index, TItem item) { TKey key = GetKeyForItem(item); if (key != null) { AddKey(key, item); } base.InsertItem(index, item); } protected override void RemoveItem(int index) { TKey key = GetKeyForItem(Items[index]); if (key != null) { RemoveKey(key); } base.RemoveItem(index); } protected override void SetItem(int index, TItem item) { TKey newKey = GetKeyForItem(item); TKey oldKey = GetKeyForItem(Items[index]); if (comparer.Equals(oldKey, newKey)) { if (newKey != null && dict != null) { dict[newKey] = item; } } else { if (newKey != null) { AddKey(newKey, item); } if (oldKey != null) { RemoveKey(oldKey); } } base.SetItem(index, item); } private void AddKey(TKey key, TItem item) { if (dict != null) { dict.Add(key, item); } else if (keyCount == threshold) { CreateDictionary(); dict.Add(key, item); } else { if (Contains(key)) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_AddingDuplicate); } keyCount++; } } private void CreateDictionary() { dict = new Dictionary (comparer); foreach (TItem item in Items) { TKey key = GetKeyForItem(item); if (key != null) { dict.Add(key, item); } } } private void RemoveKey(TKey key) { BCLDebug.Assert(key != null, "key shouldn't be null!"); if (dict != null) { dict.Remove(key); } else { keyCount--; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. namespace System.Collections.ObjectModel { using System; using System.Collections.Generic; using System.Diagnostics; [Serializable()] [System.Runtime.InteropServices.ComVisible(false)] [DebuggerTypeProxy(typeof(Mscorlib_KeyedCollectionDebugView<,>))] [DebuggerDisplay("Count = {Count}")] public abstract class KeyedCollection : Collection { const int defaultThreshold = 0; IEqualityComparer comparer; Dictionary dict; int keyCount; int threshold; protected KeyedCollection(): this(null, defaultThreshold) {} protected KeyedCollection(IEqualityComparer comparer): this(comparer, defaultThreshold) {} protected KeyedCollection(IEqualityComparer comparer, int dictionaryCreationThreshold) { if (comparer == null) { comparer = EqualityComparer .Default; } if (dictionaryCreationThreshold == -1) { dictionaryCreationThreshold = int.MaxValue; } if( dictionaryCreationThreshold < -1) { ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.dictionaryCreationThreshold, ExceptionResource.ArgumentOutOfRange_InvalidThreshold); } this.comparer = comparer; this.threshold = dictionaryCreationThreshold; } public IEqualityComparer Comparer { get { return comparer; } } public TItem this[TKey key] { get { if( key == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key); } if (dict != null) { return dict[key]; } foreach (TItem item in Items) { if (comparer.Equals(GetKeyForItem(item), key)) return item; } ThrowHelper.ThrowKeyNotFoundException(); return default(TItem); } } public bool Contains(TKey key) { if( key == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key); } if (dict != null) { return dict.ContainsKey(key); } if (key != null) { foreach (TItem item in Items) { if (comparer.Equals(GetKeyForItem(item), key)) return true; } } return false; } private bool ContainsItem(TItem item) { TKey key; if( (dict == null) || ((key = GetKeyForItem(item)) == null)) { return Items.Contains(item); } TItem itemInDict; bool exist = dict.TryGetValue(key, out itemInDict); if( exist) { return EqualityComparer .Default.Equals(itemInDict, item); } return false; } public bool Remove(TKey key) { if( key == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key); } if (dict != null) { if (dict.ContainsKey(key)) { return Remove(dict[key]); } return false; } if (key != null) { for (int i = 0; i < Items.Count; i++) { if (comparer.Equals(GetKeyForItem(Items[i]), key)) { RemoveItem(i); return true; } } } return false; } protected IDictionary Dictionary { get { return dict; } } protected void ChangeItemKey(TItem item, TKey newKey) { // check if the item exists in the collection if( !ContainsItem(item)) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_ItemNotExist); } TKey oldKey = GetKeyForItem(item); if (!comparer.Equals(oldKey, newKey)) { if (newKey != null) { AddKey(newKey, item); } if (oldKey != null) { RemoveKey(oldKey); } } } protected override void ClearItems() { base.ClearItems(); if (dict != null) { dict.Clear(); } keyCount = 0; } protected abstract TKey GetKeyForItem(TItem item); protected override void InsertItem(int index, TItem item) { TKey key = GetKeyForItem(item); if (key != null) { AddKey(key, item); } base.InsertItem(index, item); } protected override void RemoveItem(int index) { TKey key = GetKeyForItem(Items[index]); if (key != null) { RemoveKey(key); } base.RemoveItem(index); } protected override void SetItem(int index, TItem item) { TKey newKey = GetKeyForItem(item); TKey oldKey = GetKeyForItem(Items[index]); if (comparer.Equals(oldKey, newKey)) { if (newKey != null && dict != null) { dict[newKey] = item; } } else { if (newKey != null) { AddKey(newKey, item); } if (oldKey != null) { RemoveKey(oldKey); } } base.SetItem(index, item); } private void AddKey(TKey key, TItem item) { if (dict != null) { dict.Add(key, item); } else if (keyCount == threshold) { CreateDictionary(); dict.Add(key, item); } else { if (Contains(key)) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_AddingDuplicate); } keyCount++; } } private void CreateDictionary() { dict = new Dictionary (comparer); foreach (TItem item in Items) { TKey key = GetKeyForItem(item); if (key != null) { dict.Add(key, item); } } } private void RemoveKey(TKey key) { BCLDebug.Assert(key != null, "key shouldn't be null!"); if (dict != null) { dict.Remove(key); } else { keyCount--; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DataKey.cs
- BitArray.cs
- _NegoStream.cs
- MenuStrip.cs
- counter.cs
- MouseWheelEventArgs.cs
- ListCollectionView.cs
- CommonProperties.cs
- XmlCharacterData.cs
- HtmlImage.cs
- BrowserTree.cs
- LayoutEngine.cs
- DoubleLinkList.cs
- ClipboardData.cs
- EnumType.cs
- DelayLoadType.cs
- AlternateViewCollection.cs
- WebHeaderCollection.cs
- FixedTextPointer.cs
- DataServiceHost.cs
- TextMarkerSource.cs
- HashFinalRequest.cs
- PocoPropertyAccessorStrategy.cs
- UseLicense.cs
- TextEndOfSegment.cs
- SslStream.cs
- ValueUtilsSmi.cs
- RuntimeTrackingProfile.cs
- SafeNativeMethodsOther.cs
- ExitEventArgs.cs
- PolicyException.cs
- IconBitmapDecoder.cs
- ItemCollection.cs
- HelpProvider.cs
- TrustLevel.cs
- Assembly.cs
- DrawTreeNodeEventArgs.cs
- UnicodeEncoding.cs
- ButtonPopupAdapter.cs
- PeerNearMe.cs
- DbConnectionPoolOptions.cs
- WebPartDisplayModeCollection.cs
- PropertyPushdownHelper.cs
- PasswordBoxAutomationPeer.cs
- Pair.cs
- HttpMethodConstraint.cs
- MediaCommands.cs
- WebServiceData.cs
- translator.cs
- StylusEventArgs.cs
- NumberEdit.cs
- ScrollViewer.cs
- RuntimeConfig.cs
- RemotingAttributes.cs
- StateItem.cs
- StackSpiller.Temps.cs
- QueryResponse.cs
- AggregationMinMaxHelpers.cs
- RectangleF.cs
- XPathScanner.cs
- BooleanStorage.cs
- EntityViewGenerationConstants.cs
- listviewsubitemcollectioneditor.cs
- MeshGeometry3D.cs
- Decimal.cs
- ClientSideProviderDescription.cs
- DateTimeParse.cs
- DataPagerCommandEventArgs.cs
- TemplateBindingExpression.cs
- ShimAsPublicXamlType.cs
- ToolStripDropDownItemDesigner.cs
- DataViewManagerListItemTypeDescriptor.cs
- XPathSelfQuery.cs
- ResourceDescriptionAttribute.cs
- CacheMemory.cs
- FileLogRecordStream.cs
- HostVisual.cs
- VisualBrush.cs
- WebServiceErrorEvent.cs
- WorkflowDataContext.cs
- UncommonField.cs
- IdentityReference.cs
- PageStatePersister.cs
- DiffuseMaterial.cs
- UnaryOperationBinder.cs
- StorageEntitySetMapping.cs
- XmlEventCache.cs
- LightweightCodeGenerator.cs
- QuaternionAnimationUsingKeyFrames.cs
- LineGeometry.cs
- DataTableReaderListener.cs
- StringValueSerializer.cs
- SafeSystemMetrics.cs
- SHA256Managed.cs
- WorkflowViewService.cs
- EventSetter.cs
- ScrollBar.cs
- TextAction.cs
- AnimationException.cs
- BufferBuilder.cs