Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataSet / System / Data / EnumerableRowCollectionExtensions.cs / 1 / EnumerableRowCollectionExtensions.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Globalization; using System.Diagnostics; namespace System.Data { ////// This static class defines the extension methods that add LINQ operator functionality /// within IEnumerableDT and IOrderedEnumerableDT. /// public static class EnumerableRowCollectionExtensions { ////// LINQ's Where operator for generic EnumerableRowCollection. /// public static EnumerableRowCollectionWhere ( this EnumerableRowCollection source, Func predicate) { EnumerableRowCollection edt = new EnumerableRowCollection (source, Enumerable.Where (source, predicate), null); //copy constructor edt.AddPredicate(predicate); return edt; } /// /// LINQ's OrderBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderBy ( this EnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.OrderBy (source, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, false, true); return edt; } /// /// LINQ's OrderBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderBy ( this EnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.OrderBy (source, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, comparer, false, true); return edt; } /// /// LINQ's OrderByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderByDescending ( this EnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.OrderByDescending (source, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, true, true); return edt; } /// /// LINQ's OrderByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderByDescending ( this EnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.OrderByDescending (source, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, comparer, true, true); return edt; } /// /// LINQ's ThenBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenBy ( this OrderedEnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.ThenBy ((IOrderedEnumerable )source.EnumerableRows, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, /*isDesc*/ false, /*isOrderBy*/ false); return edt; } /// /// LINQ's ThenBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenBy ( this OrderedEnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.ThenBy ((IOrderedEnumerable )source.EnumerableRows, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, comparer, false, false); return edt; } /// /// LINQ's ThenByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenByDescending ( this OrderedEnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.ThenByDescending ((IOrderedEnumerable )source.EnumerableRows, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, /*desc*/ true, false); return edt; } /// /// LINQ's ThenByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenByDescending ( this OrderedEnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.ThenByDescending ((IOrderedEnumerable )source.EnumerableRows, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, comparer, true, false); return edt; } /// /// Executes a Select (Projection) on EnumerableDataTable. If the selector returns a different /// type than the type of rows, then AsLinqDataView is disabled, and the returning EnumerableDataTable /// represents an enumerable over the LINQ Query. /// public static EnumerableRowCollectionSelect( this EnumerableRowCollection source, Func selector) { //Anonymous type or some other type //The only thing that matters from this point on is _enumerableRows IEnumerable typedEnumerable = Enumerable.Select(source, selector); // Dont need predicates or sort expression from this point on since we know // AsLinqDataView is disabled. return new EnumerableRowCollection (((object)source) as EnumerableRowCollection, typedEnumerable, ((object)selector) as Func); } ////// Casts an EnumerableDataTable_TSource into EnumerableDataTable_TResult /// public static EnumerableRowCollectionCast (this EnumerableRowCollection source) { // Since Cast does not have the signature Cast_T_R(..) this call is routed // through the non-generic base class EnumerableDataTable if ((null != source) && source.ElementType.Equals(typeof(TResult))) { return (EnumerableRowCollection )(object)source; } else { //Anonymous type or some other type //The only thing that matters from this point on is _enumerableRows IEnumerable typedEnumerable = Enumerable.Cast (source); EnumerableRowCollection newEdt = new EnumerableRowCollection ( typedEnumerable, typeof(TResult).IsAssignableFrom(source.ElementType) && typeof(DataRow).IsAssignableFrom(typeof(TResult)), source.Table); return newEdt; } } } //end class } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Globalization; using System.Diagnostics; namespace System.Data { ////// This static class defines the extension methods that add LINQ operator functionality /// within IEnumerableDT and IOrderedEnumerableDT. /// public static class EnumerableRowCollectionExtensions { ////// LINQ's Where operator for generic EnumerableRowCollection. /// public static EnumerableRowCollectionWhere ( this EnumerableRowCollection source, Func predicate) { EnumerableRowCollection edt = new EnumerableRowCollection (source, Enumerable.Where (source, predicate), null); //copy constructor edt.AddPredicate(predicate); return edt; } /// /// LINQ's OrderBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderBy ( this EnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.OrderBy (source, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, false, true); return edt; } /// /// LINQ's OrderBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderBy ( this EnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.OrderBy (source, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, comparer, false, true); return edt; } /// /// LINQ's OrderByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderByDescending ( this EnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.OrderByDescending (source, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, true, true); return edt; } /// /// LINQ's OrderByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionOrderByDescending ( this EnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.OrderByDescending (source, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection (source, ie); edt.AddSortExpression(keySelector, comparer, true, true); return edt; } /// /// LINQ's ThenBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenBy ( this OrderedEnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.ThenBy ((IOrderedEnumerable )source.EnumerableRows, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, /*isDesc*/ false, /*isOrderBy*/ false); return edt; } /// /// LINQ's ThenBy operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenBy ( this OrderedEnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.ThenBy ((IOrderedEnumerable )source.EnumerableRows, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, comparer, false, false); return edt; } /// /// LINQ's ThenByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenByDescending ( this OrderedEnumerableRowCollection source, Func keySelector) { IEnumerable ie = Enumerable.ThenByDescending ((IOrderedEnumerable )source.EnumerableRows, keySelector); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, /*desc*/ true, false); return edt; } /// /// LINQ's ThenByDescending operator for generic EnumerableRowCollection. /// public static OrderedEnumerableRowCollectionThenByDescending ( this OrderedEnumerableRowCollection source, Func keySelector, IComparer comparer) { IEnumerable ie = Enumerable.ThenByDescending ((IOrderedEnumerable )source.EnumerableRows, keySelector, comparer); OrderedEnumerableRowCollection edt = new OrderedEnumerableRowCollection ((EnumerableRowCollection )source, ie); edt.AddSortExpression(keySelector, comparer, true, false); return edt; } /// /// Executes a Select (Projection) on EnumerableDataTable. If the selector returns a different /// type than the type of rows, then AsLinqDataView is disabled, and the returning EnumerableDataTable /// represents an enumerable over the LINQ Query. /// public static EnumerableRowCollectionSelect( this EnumerableRowCollection source, Func selector) { //Anonymous type or some other type //The only thing that matters from this point on is _enumerableRows IEnumerable typedEnumerable = Enumerable.Select(source, selector); // Dont need predicates or sort expression from this point on since we know // AsLinqDataView is disabled. return new EnumerableRowCollection (((object)source) as EnumerableRowCollection, typedEnumerable, ((object)selector) as Func); } ////// Casts an EnumerableDataTable_TSource into EnumerableDataTable_TResult /// public static EnumerableRowCollectionCast (this EnumerableRowCollection source) { // Since Cast does not have the signature Cast_T_R(..) this call is routed // through the non-generic base class EnumerableDataTable if ((null != source) && source.ElementType.Equals(typeof(TResult))) { return (EnumerableRowCollection )(object)source; } else { //Anonymous type or some other type //The only thing that matters from this point on is _enumerableRows IEnumerable typedEnumerable = Enumerable.Cast (source); EnumerableRowCollection newEdt = new EnumerableRowCollection ( typedEnumerable, typeof(TResult).IsAssignableFrom(source.ElementType) && typeof(DataRow).IsAssignableFrom(typeof(TResult)), source.Table); return newEdt; } } } //end class } // 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
- XmlILOptimizerVisitor.cs
- XmlAutoDetectWriter.cs
- UndoManager.cs
- AutoSizeToolBoxItem.cs
- BookmarkUndoUnit.cs
- MsmqInputChannel.cs
- FontCacheUtil.cs
- ExpressionBuilder.cs
- TextSelectionHighlightLayer.cs
- XmlSchemaObjectCollection.cs
- StateValidator.cs
- EntityProviderServices.cs
- CodeIdentifier.cs
- ConfigXmlSignificantWhitespace.cs
- PathStreamGeometryContext.cs
- TickBar.cs
- XPathDocumentNavigator.cs
- BackgroundWorker.cs
- ComponentDispatcherThread.cs
- CaseInsensitiveComparer.cs
- BinHexDecoder.cs
- DataGridViewDataErrorEventArgs.cs
- SelectionListComponentEditor.cs
- EditorBrowsableAttribute.cs
- WebEventTraceProvider.cs
- SqlFlattener.cs
- PerformanceCounterPermissionEntry.cs
- AttachedPropertyBrowsableForTypeAttribute.cs
- ApplicationFileParser.cs
- WebPartEventArgs.cs
- WebColorConverter.cs
- UnmanagedHandle.cs
- WebZone.cs
- StackBuilderSink.cs
- RotateTransform.cs
- Crypto.cs
- MsmqIntegrationBinding.cs
- InboundActivityHelper.cs
- DocumentGridContextMenu.cs
- CodeCatchClauseCollection.cs
- TagNameToTypeMapper.cs
- AnnotationResourceChangedEventArgs.cs
- SqlParameterizer.cs
- SafeNativeMemoryHandle.cs
- ContainsRowNumberChecker.cs
- Expression.DebuggerProxy.cs
- PropertyIDSet.cs
- CheckBoxFlatAdapter.cs
- regiisutil.cs
- HuffModule.cs
- IndexedEnumerable.cs
- DataGridViewSelectedRowCollection.cs
- TextEditor.cs
- MethodToken.cs
- CollectionsUtil.cs
- Publisher.cs
- XamlDesignerSerializationManager.cs
- DbDataAdapter.cs
- FrameworkRichTextComposition.cs
- ACL.cs
- SQLUtility.cs
- IdentityModelStringsVersion1.cs
- List.cs
- BookmarkUndoUnit.cs
- ApplicationServicesHostFactory.cs
- AppDomain.cs
- WindowsListViewGroupSubsetLink.cs
- CheckedPointers.cs
- DiagnosticsConfigurationHandler.cs
- UriExt.cs
- ExpandCollapseProviderWrapper.cs
- ProgressBarHighlightConverter.cs
- DoubleLinkList.cs
- NullableBoolConverter.cs
- CFStream.cs
- SafePipeHandle.cs
- CancellableEnumerable.cs
- TabletDeviceInfo.cs
- Win32.cs
- XmlSchemaParticle.cs
- SiteMapNode.cs
- MetadataHelper.cs
- CallbackValidator.cs
- StructuredTypeEmitter.cs
- RegexFCD.cs
- DoubleLinkList.cs
- DataGridItem.cs
- CodeIterationStatement.cs
- xamlnodes.cs
- ProcessThreadCollection.cs
- FocusWithinProperty.cs
- GCHandleCookieTable.cs
- DataGridViewRowsRemovedEventArgs.cs
- HostingEnvironmentException.cs
- WebBaseEventKeyComparer.cs
- SQLMembershipProvider.cs
- ContextStack.cs
- ConfigPathUtility.cs
- lengthconverter.cs
- ConcatQueryOperator.cs