Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataSet / System / Data / EnumerableRowCollectionExtensions.cs / 1305376 / 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
- MethodBody.cs
- Assembly.cs
- ResourceWriter.cs
- IIS7UserPrincipal.cs
- RelationshipFixer.cs
- HitTestWithGeometryDrawingContextWalker.cs
- PackageFilter.cs
- CheckBoxRenderer.cs
- basecomparevalidator.cs
- BitmapSizeOptions.cs
- StatusBarPanel.cs
- RegexFCD.cs
- WorkflowPrinting.cs
- ControlBuilderAttribute.cs
- Keyboard.cs
- TypedDataSourceCodeGenerator.cs
- EmptyStringExpandableObjectConverter.cs
- CheckBoxPopupAdapter.cs
- XmlElementList.cs
- NameScope.cs
- AddInProcess.cs
- ValidationSummary.cs
- RegexGroup.cs
- Binding.cs
- SimpleExpression.cs
- CanExecuteRoutedEventArgs.cs
- WebFormsRootDesigner.cs
- FileLevelControlBuilderAttribute.cs
- SqlNotificationRequest.cs
- ListParaClient.cs
- SweepDirectionValidation.cs
- ColorKeyFrameCollection.cs
- PackWebResponse.cs
- BindingExpressionBase.cs
- propertytag.cs
- PrinterResolution.cs
- DeviceOverridableAttribute.cs
- LogWriteRestartAreaAsyncResult.cs
- AuthenticationManager.cs
- PostBackTrigger.cs
- TreeNodeEventArgs.cs
- MbpInfo.cs
- IncrementalCompileAnalyzer.cs
- BitmapEffect.cs
- ProvidePropertyAttribute.cs
- HttpDictionary.cs
- DbDataAdapter.cs
- ImageList.cs
- LambdaCompiler.Generated.cs
- QueryCacheManager.cs
- DateTimeConverter.cs
- RawStylusSystemGestureInputReport.cs
- Button.cs
- SByteStorage.cs
- InfoCardXmlSerializer.cs
- LogWriteRestartAreaState.cs
- AssociationSetMetadata.cs
- ErrorActivity.cs
- DocComment.cs
- IdentityManager.cs
- FixedSchema.cs
- TextDpi.cs
- DependencyObject.cs
- KeyBinding.cs
- ImageMap.cs
- SQLBytes.cs
- ISSmlParser.cs
- Triangle.cs
- IMembershipProvider.cs
- FillErrorEventArgs.cs
- DataGridViewCellStyleConverter.cs
- CustomErrorCollection.cs
- SafeCryptoKeyHandle.cs
- TrackPoint.cs
- MailAddressParser.cs
- DataViewSetting.cs
- ObjectItemCachedAssemblyLoader.cs
- GridItem.cs
- AddingNewEventArgs.cs
- FontStyle.cs
- DataRowChangeEvent.cs
- ControlValuePropertyAttribute.cs
- GacUtil.cs
- TypeUsageBuilder.cs
- PrivilegedConfigurationManager.cs
- SafeHandle.cs
- PanelDesigner.cs
- remotingproxy.cs
- UIElementIsland.cs
- Int64Converter.cs
- ListBoxItem.cs
- StandardToolWindows.cs
- ErrorReporting.cs
- ByteFacetDescriptionElement.cs
- DependencyPropertyKey.cs
- StringUtil.cs
- RoleService.cs
- ReferentialConstraintRoleElement.cs
- XamlStyleSerializer.cs
- ContentPlaceHolder.cs