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
- CloudCollection.cs
- TraceSource.cs
- XPathDescendantIterator.cs
- HttpListenerPrefixCollection.cs
- Parser.cs
- EventLog.cs
- WebPartMenuStyle.cs
- ProviderConnectionPointCollection.cs
- SizeChangedInfo.cs
- ExecutionContext.cs
- ToolStripPanel.cs
- ThemeInfoAttribute.cs
- TemplatedAdorner.cs
- StringAnimationUsingKeyFrames.cs
- FacetDescriptionElement.cs
- BitmapFrame.cs
- TextEditorDragDrop.cs
- XmlComplianceUtil.cs
- __TransparentProxy.cs
- Tracking.cs
- SqlMethodAttribute.cs
- WebControl.cs
- XhtmlConformanceSection.cs
- CodeDOMUtility.cs
- JsonFormatMapping.cs
- TimeSpanConverter.cs
- DefaultAsyncDataDispatcher.cs
- PaginationProgressEventArgs.cs
- MarginsConverter.cs
- TemplateXamlParser.cs
- AuthenticationModuleElementCollection.cs
- TimelineGroup.cs
- RepeaterItemEventArgs.cs
- Collection.cs
- RepeatBehavior.cs
- _CommandStream.cs
- WaitHandleCannotBeOpenedException.cs
- InvokeCompletedEventArgs.cs
- XmlDocumentFragment.cs
- InvalidFilterCriteriaException.cs
- GeometryHitTestResult.cs
- SqlMethods.cs
- FormsAuthenticationUserCollection.cs
- DtdParser.cs
- ConfigurationValidatorBase.cs
- SoapSchemaExporter.cs
- SQLCharsStorage.cs
- ObjectDesignerDataSourceView.cs
- PointCollectionValueSerializer.cs
- LineInfo.cs
- GridLength.cs
- AppDomainEvidenceFactory.cs
- PreservationFileWriter.cs
- SystemWebCachingSectionGroup.cs
- TemplateControlCodeDomTreeGenerator.cs
- TextTreeRootTextBlock.cs
- AsymmetricKeyExchangeDeformatter.cs
- FixedFindEngine.cs
- TypeBuilderInstantiation.cs
- FileLevelControlBuilderAttribute.cs
- Font.cs
- RepeaterItem.cs
- SqlWorkflowPersistenceService.cs
- VisualStyleElement.cs
- AliasedSlot.cs
- Bitmap.cs
- CustomCredentialPolicy.cs
- SelectionRangeConverter.cs
- HttpGetServerProtocol.cs
- RoutedEventHandlerInfo.cs
- CngProvider.cs
- SingleResultAttribute.cs
- EdmComplexTypeAttribute.cs
- EdmPropertyAttribute.cs
- CSharpCodeProvider.cs
- UInt32.cs
- ThreadInterruptedException.cs
- XmlSchemaAnnotation.cs
- DbInsertCommandTree.cs
- NativeMethods.cs
- Column.cs
- UnauthorizedAccessException.cs
- FormViewInsertEventArgs.cs
- AspProxy.cs
- FlowDocument.cs
- SafeMILHandle.cs
- DelegateOutArgument.cs
- ExtensionDataObject.cs
- COM2PropertyDescriptor.cs
- TriggerAction.cs
- Thread.cs
- RectangleGeometry.cs
- StaticFileHandler.cs
- Rfc2898DeriveBytes.cs
- X509CertificateCollection.cs
- Clause.cs
- EmbeddedMailObjectsCollection.cs
- HighlightVisual.cs
- ResetableIterator.cs
- EntityStoreSchemaFilterEntry.cs