Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DLinq / Dlinq / SortableBindingList.cs / 1 / SortableBindingList.cs
using System; using System.Linq; using System.Collections.Generic; using System.Text; using System.ComponentModel; using System.Linq.Expressions; using System.Collections; using System.Reflection; using System.Xml.Linq; namespace System.Data.Linq { ////// Adds sorting feature to BindingList ////// internal class SortableBindingList : BindingList { internal SortableBindingList(IList list) : base(list) { } private bool isSorted = false; private PropertyDescriptor sortProperty = null; private ListSortDirection sortDirection = ListSortDirection.Ascending; protected override void RemoveSortCore() { isSorted = false; sortProperty = null; } protected override ListSortDirection SortDirectionCore { get { return sortDirection; } } protected override PropertyDescriptor SortPropertyCore { get { return sortProperty; } } protected override bool IsSortedCore { get { return isSorted; } } protected override bool SupportsSortingCore { get { return true; } } protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction) { //Only apply sort if the column is sortable, decision was made not to throw in this case. //Don't prevent nullable types from working. Type propertyType = prop.PropertyType; if (PropertyComparer.IsAllowable(propertyType)) { ((List )this.Items).Sort(new PropertyComparer(prop, direction)); sortDirection = direction; sortProperty = prop; isSorted = true; OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, -1)); } } internal class PropertyComparer : Comparer { private PropertyDescriptor prop; private IComparer comparer; private ListSortDirection direction; private bool useToString; internal PropertyComparer(PropertyDescriptor prop, ListSortDirection direction) { if (prop.ComponentType != typeof(T)) { throw new MissingMemberException(typeof(T).Name, prop.Name); } this.prop = prop; this.direction = direction; if (OkWithIComparable(prop.PropertyType)) { Type comparerType = typeof(Comparer<>).MakeGenericType(prop.PropertyType); PropertyInfo defaultComparer = comparerType.GetProperty("Default"); comparer = (IComparer)defaultComparer.GetValue(null, null); useToString = false; } else if (OkWithToString(prop.PropertyType)) { comparer = StringComparer.CurrentCultureIgnoreCase; useToString = true; } } public override int Compare(T x, T y) { object xValue = prop.GetValue(x); object yValue = prop.GetValue(y); if (useToString) { xValue = xValue != null ? xValue.ToString() : null; yValue = yValue != null ? yValue.ToString() : null; } if (direction == ListSortDirection.Ascending) { return comparer.Compare(xValue, yValue); } else { return comparer.Compare(yValue, xValue); } } protected static bool OkWithToString(Type t) { // this is the list of types that behave specially for the purpose of // sorting. if we have a property of this type, and it does not implement // IComparable, then this class will sort the properties according to the // ToString() method. // In the case of an XNode, the ToString() returns the // XML, which is what we care about. return (t.Equals(typeof(XNode)) || t.IsSubclassOf(typeof(XNode))); } protected static bool OkWithIComparable(Type t) { return (t.GetInterface("IComparable") != null) || (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>)); } public static bool IsAllowable(Type t) { return OkWithToString(t) || OkWithIComparable(t); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.Linq; using System.Collections.Generic; using System.Text; using System.ComponentModel; using System.Linq.Expressions; using System.Collections; using System.Reflection; using System.Xml.Linq; namespace System.Data.Linq { /// /// Adds sorting feature to BindingList ////// internal class SortableBindingList : BindingList { internal SortableBindingList(IList list) : base(list) { } private bool isSorted = false; private PropertyDescriptor sortProperty = null; private ListSortDirection sortDirection = ListSortDirection.Ascending; protected override void RemoveSortCore() { isSorted = false; sortProperty = null; } protected override ListSortDirection SortDirectionCore { get { return sortDirection; } } protected override PropertyDescriptor SortPropertyCore { get { return sortProperty; } } protected override bool IsSortedCore { get { return isSorted; } } protected override bool SupportsSortingCore { get { return true; } } protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction) { //Only apply sort if the column is sortable, decision was made not to throw in this case. //Don't prevent nullable types from working. Type propertyType = prop.PropertyType; if (PropertyComparer.IsAllowable(propertyType)) { ((List )this.Items).Sort(new PropertyComparer(prop, direction)); sortDirection = direction; sortProperty = prop; isSorted = true; OnListChanged(new ListChangedEventArgs(ListChangedType.Reset, -1)); } } internal class PropertyComparer : Comparer { private PropertyDescriptor prop; private IComparer comparer; private ListSortDirection direction; private bool useToString; internal PropertyComparer(PropertyDescriptor prop, ListSortDirection direction) { if (prop.ComponentType != typeof(T)) { throw new MissingMemberException(typeof(T).Name, prop.Name); } this.prop = prop; this.direction = direction; if (OkWithIComparable(prop.PropertyType)) { Type comparerType = typeof(Comparer<>).MakeGenericType(prop.PropertyType); PropertyInfo defaultComparer = comparerType.GetProperty("Default"); comparer = (IComparer)defaultComparer.GetValue(null, null); useToString = false; } else if (OkWithToString(prop.PropertyType)) { comparer = StringComparer.CurrentCultureIgnoreCase; useToString = true; } } public override int Compare(T x, T y) { object xValue = prop.GetValue(x); object yValue = prop.GetValue(y); if (useToString) { xValue = xValue != null ? xValue.ToString() : null; yValue = yValue != null ? yValue.ToString() : null; } if (direction == ListSortDirection.Ascending) { return comparer.Compare(xValue, yValue); } else { return comparer.Compare(yValue, xValue); } } protected static bool OkWithToString(Type t) { // this is the list of types that behave specially for the purpose of // sorting. if we have a property of this type, and it does not implement // IComparable, then this class will sort the properties according to the // ToString() method. // In the case of an XNode, the ToString() returns the // XML, which is what we care about. return (t.Equals(typeof(XNode)) || t.IsSubclassOf(typeof(XNode))); } protected static bool OkWithIComparable(Type t) { return (t.GetInterface("IComparable") != null) || (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>)); } public static bool IsAllowable(Type t) { return OkWithToString(t) || OkWithIComparable(t); } } } } // 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
- TextTreeUndo.cs
- Synchronization.cs
- IgnorePropertiesAttribute.cs
- ExpressionEvaluator.cs
- CorrelationTokenTypeConvertor.cs
- WebPartMenuStyle.cs
- BitmapPalettes.cs
- SchemaReference.cs
- EntityProxyTypeInfo.cs
- AdapterDictionary.cs
- XsdDuration.cs
- WebPartConnection.cs
- HierarchicalDataBoundControl.cs
- xsdvalidator.cs
- PersonalizationStateInfo.cs
- FilePrompt.cs
- Cursor.cs
- BatchWriter.cs
- ConvertTextFrag.cs
- EventLogPermissionEntry.cs
- ProviderCollection.cs
- HtmlShimManager.cs
- FormatterServicesNoSerializableCheck.cs
- MatrixCamera.cs
- QilStrConcat.cs
- SimpleWorkerRequest.cs
- Geometry3D.cs
- RenderTargetBitmap.cs
- CurrentTimeZone.cs
- mediapermission.cs
- PickBranch.cs
- FormViewInsertedEventArgs.cs
- ScriptingWebServicesSectionGroup.cs
- ItemContainerGenerator.cs
- GridLength.cs
- ByteStream.cs
- GPPOINT.cs
- Int32RectValueSerializer.cs
- ResourcePart.cs
- IWorkflowDebuggerService.cs
- Pts.cs
- EdmMember.cs
- SHA512Managed.cs
- OdbcTransaction.cs
- DataGridViewCellToolTipTextNeededEventArgs.cs
- dtdvalidator.cs
- BStrWrapper.cs
- WebPartDisplayModeCollection.cs
- HtmlShimManager.cs
- MenuItemBinding.cs
- AssemblyCollection.cs
- GrammarBuilderBase.cs
- GeometryModel3D.cs
- DynamicEntity.cs
- StateWorkerRequest.cs
- EventWaitHandleSecurity.cs
- XsltLoader.cs
- SupportsEventValidationAttribute.cs
- ModuleBuilderData.cs
- ItemChangedEventArgs.cs
- DataServiceRequest.cs
- AnyReturnReader.cs
- KnownBoxes.cs
- SortedList.cs
- InputScopeConverter.cs
- EditingScopeUndoUnit.cs
- WebServiceFault.cs
- ConfigurationSchemaErrors.cs
- ManagementEventWatcher.cs
- AnnotationMap.cs
- SelectionPattern.cs
- Geometry.cs
- KeyInterop.cs
- CssTextWriter.cs
- ActiveXMessageFormatter.cs
- CodeMemberMethod.cs
- XhtmlCssHandler.cs
- ForeignConstraint.cs
- IConvertible.cs
- DefaultProxySection.cs
- EdgeProfileValidation.cs
- BaseUriHelper.cs
- ImageMapEventArgs.cs
- SqlDataAdapter.cs
- PolyQuadraticBezierSegment.cs
- WebPartDisplayModeCollection.cs
- TextHidden.cs
- HtmlFormWrapper.cs
- BitmapVisualManager.cs
- SyndicationDeserializer.cs
- SafeRegistryHandle.cs
- DocumentViewerAutomationPeer.cs
- SqlError.cs
- AutomationTextAttribute.cs
- PointLightBase.cs
- InitializingNewItemEventArgs.cs
- UpdateTracker.cs
- DispatchWrapper.cs
- ChunkedMemoryStream.cs
- SQLGuid.cs