Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Collections / ObjectModel / ReadOnlyCollection.cs / 1 / ReadOnlyCollection.cs
namespace System.Collections.ObjectModel { using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; [Serializable()] [System.Runtime.InteropServices.ComVisible(false)] [DebuggerTypeProxy(typeof(Mscorlib_CollectionDebugView<>))] [DebuggerDisplay("Count = {Count}")] public class ReadOnlyCollection: IList , IList { IList list; [NonSerialized] private Object _syncRoot; public ReadOnlyCollection(IList list) { if (list == null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.list); } this.list = list; } public int Count { get { return list.Count; } } public T this[int index] { get { return list[index]; } } public bool Contains(T value) { return list.Contains(value); } public void CopyTo(T[] array, int index) { list.CopyTo(array, index); } public IEnumerator GetEnumerator() { return list.GetEnumerator(); } public int IndexOf(T value) { return list.IndexOf(value); } protected IList Items { get { return list; } } bool ICollection .IsReadOnly { get { return true; } } T IList .this[int index] { get { return list[index]; } set { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } } void ICollection .Add(T value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void ICollection .Clear() { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void IList .Insert(int index, T value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } bool ICollection .Remove(T value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); return false; } void IList .RemoveAt(int index) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } IEnumerator IEnumerable.GetEnumerator() { return ((IEnumerable)list).GetEnumerator(); } bool ICollection.IsSynchronized { get { return false; } } object ICollection.SyncRoot { get { if( _syncRoot == null) { ICollection c = list as ICollection; if( c != null) { _syncRoot = c.SyncRoot; } else { System.Threading.Interlocked.CompareExchange(ref _syncRoot, new Object(), null); } } return _syncRoot; } } void ICollection.CopyTo(Array array, int index) { if (array==null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.array); } if (array.Rank != 1) { ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_RankMultiDimNotSupported); } if( array.GetLowerBound(0) != 0 ) { ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_NonZeroLowerBound); } if (index < 0) { ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.arrayIndex, ExceptionResource.ArgumentOutOfRange_NeedNonNegNum); } if (array.Length - index < Count) { ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall); } T[] items = array as T[]; if (items != null) { list.CopyTo(items, index); } else { // // Catch the obvious case assignment will fail. // We can found all possible problems by doing the check though. // For example, if the element type of the Array is derived from T, // we can't figure out if we can successfully copy the element beforehand. // Type targetType = array.GetType().GetElementType(); Type sourceType = typeof(T); if(!(targetType.IsAssignableFrom(sourceType) || sourceType.IsAssignableFrom(targetType))) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType); } // // We can't cast array of value type to object[], so we don't support // widening of primitive types here. // object[] objects = array as object[]; if( objects == null) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType); } int count = list.Count; try { for (int i = 0; i < count; i++) { objects[index++] = list[i]; } } catch(ArrayTypeMismatchException) { ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidArrayType); } } } bool IList.IsFixedSize { get { return true; } } bool IList.IsReadOnly { get { return true; } } object IList.this[int index] { get { return list[index]; } set { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } } int IList.Add(object value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); return -1; } void IList.Clear() { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } private static bool IsCompatibleObject(object value) { if( (value is T) || ( value == null && !typeof(T).IsValueType) ) { return true; } return false; } bool IList.Contains(object value) { if(IsCompatibleObject(value)) { return Contains((T)value); } return false; } int IList.IndexOf(object value) { if(IsCompatibleObject(value)) { return IndexOf((T)value); } return -1; } void IList.Insert(int index, object value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void IList.Remove(object value) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } void IList.RemoveAt(int index) { ThrowHelper.ThrowNotSupportedException(ExceptionResource.NotSupported_ReadOnlyCollection); } private static void VerifyValueType(object value) { if( !IsCompatibleObject(value)) { ThrowHelper.ThrowWrongValueTypeArgumentException(value, typeof(T)); } } } }
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ViewBase.cs
- MouseEventArgs.cs
- ProcessProtocolHandler.cs
- EditingMode.cs
- NumericExpr.cs
- DisableDpiAwarenessAttribute.cs
- AutomationPatternInfo.cs
- WebHttpEndpoint.cs
- WebPart.cs
- UserMapPath.cs
- WebPartConnectionsDisconnectVerb.cs
- formatter.cs
- NameValueConfigurationElement.cs
- PlainXmlWriter.cs
- GridViewRowCollection.cs
- QilGenerator.cs
- HwndTarget.cs
- DataGridViewCellCancelEventArgs.cs
- Error.cs
- BatchWriter.cs
- CodeMemberField.cs
- ToolStripComboBox.cs
- XmlSchemaSimpleContentRestriction.cs
- EventLogEntryCollection.cs
- ImageDrawing.cs
- ExtendedProperty.cs
- UriTemplateMatch.cs
- Math.cs
- MemberListBinding.cs
- MILUtilities.cs
- LogSwitch.cs
- BindingManagerDataErrorEventArgs.cs
- BaseDataList.cs
- TextOutput.cs
- TextClipboardData.cs
- TableColumnCollectionInternal.cs
- JournalEntryListConverter.cs
- UInt64Storage.cs
- DoubleCollectionConverter.cs
- SiteMapDataSource.cs
- WebPartCatalogCloseVerb.cs
- HttpListenerContext.cs
- Speller.cs
- MetadataPropertyAttribute.cs
- ResolveNameEventArgs.cs
- ZipIOExtraFieldZip64Element.cs
- ContentPlaceHolder.cs
- InstancePersistenceContext.cs
- Soap12ProtocolReflector.cs
- SecurityContextSecurityTokenParameters.cs
- sqlstateclientmanager.cs
- ForEachAction.cs
- NullableConverter.cs
- DBSqlParserColumn.cs
- MessageSmuggler.cs
- SafeWaitHandle.cs
- TextServicesCompartmentContext.cs
- ViewStateModeByIdAttribute.cs
- GeometryHitTestParameters.cs
- BCryptNative.cs
- PlatformCulture.cs
- EncoderParameter.cs
- LockCookie.cs
- Renderer.cs
- CqlWriter.cs
- Rect3D.cs
- FtpRequestCacheValidator.cs
- DocumentOrderQuery.cs
- ErrorRuntimeConfig.cs
- AssemblyInfo.cs
- ColorDialog.cs
- Sql8ExpressionRewriter.cs
- AnimatedTypeHelpers.cs
- PrintDocument.cs
- BamlResourceSerializer.cs
- BrowserTree.cs
- SortedSet.cs
- PermissionToken.cs
- FragmentQueryKB.cs
- MultiBindingExpression.cs
- RoutingTable.cs
- _SslStream.cs
- EntitySetDataBindingList.cs
- DesignerWidgets.cs
- KeyNameIdentifierClause.cs
- Line.cs
- DocumentApplicationJournalEntry.cs
- SendMailErrorEventArgs.cs
- ObjectListFieldCollection.cs
- PenLineJoinValidation.cs
- InputQueueChannelAcceptor.cs
- FormsAuthenticationUser.cs
- SoapIgnoreAttribute.cs
- CreateUserWizard.cs
- DataViewListener.cs
- ParameterModifier.cs
- ReferenceEqualityComparer.cs
- SqlFormatter.cs
- DataMemberListEditor.cs
- ZoneButton.cs