Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / System / Windows / Data / ValueConversionAttribute.cs / 1 / ValueConversionAttribute.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: allows the author of a IValueConverter // to specify what source and target property types the // ValueConverter is capable of converting // // Specs: http://avalon/connecteddata/Specs/Data%20Binding.mht // //--------------------------------------------------------------------------- using System; namespace System.Windows.Data { ////// This attribute allows the author of a ////// to specify what source and target property types the ValueConverter is capable of converting. /// This meta data is useful for designer tools to help categorize and match ValueConverters. /// /// Add this custom attribute to your IValueConverter class definition. /// [AttributeUsage(AttributeTargets.Class, AllowMultiple = true)] public sealed class ValueConversionAttribute : Attribute { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- ////// [ValueConversion(typeof(Employee), typeof(Brush))] /// class MyConverter : IValueConverter /// { /// public object Convert(object value, Type targetType, object parameter, CultureInfo culture) /// { /// if (value is Dev) return Brushes.Beige; /// if (value is Employee) return Brushes.Salmon; /// return Brushes.Yellow; /// } /// } ///
////// Creates a new ValueConversionAttribute to indicate between /// what types of a data binding source and target this ValueConverter can convert. /// /// the expected source type this ValueConverter can handle /// the target type to which this ValueConverter can convert to public ValueConversionAttribute(Type sourceType, Type targetType) { if (sourceType == null) throw new ArgumentNullException("sourceType"); if (targetType == null) throw new ArgumentNullException("targetType"); _sourceType = sourceType; _targetType = targetType; } ////// The expected source type this ValueConverter can handle. /// public Type SourceType { get { return _sourceType; } } ////// The target type to which this ValueConverter can convert to. /// public Type TargetType { get { return _targetType; } } ////// The type of the optional ValueConverter Parameter object. /// public Type ParameterType { get { return _parameterType; } set { _parameterType = value; } } ////// Returns the unique identifier for this Attribute. /// // Type ID is used to remove redundant attributes by // putting all attributes in a dictionary of [TypeId, Attribute]. // If you want AllowMultiple attributes to work with designers, // you must override TypeId. The default implementation returns // this.GetType(), which is appropriate for AllowMultiple = false, but // not for AllowMultiple = true; public override object TypeId { // the attribute itself will be used as a key to the dictionary get { return this; } } ////// Returns the hash code for this instance. /// override public int GetHashCode() { // the default implementation does some funky enumeration over its fields // we can do better and use the 2 mandatory fields source/targetType's hash codes return _sourceType.GetHashCode() + _targetType.GetHashCode(); } //-------------------------------------------- // Private members //-------------------------------------------- private Type _sourceType; private Type _targetType; private Type _parameterType; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: allows the author of a IValueConverter // to specify what source and target property types the // ValueConverter is capable of converting // // Specs: http://avalon/connecteddata/Specs/Data%20Binding.mht // //--------------------------------------------------------------------------- using System; namespace System.Windows.Data { ////// This attribute allows the author of a ////// to specify what source and target property types the ValueConverter is capable of converting. /// This meta data is useful for designer tools to help categorize and match ValueConverters. /// /// Add this custom attribute to your IValueConverter class definition. /// [AttributeUsage(AttributeTargets.Class, AllowMultiple = true)] public sealed class ValueConversionAttribute : Attribute { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- ////// [ValueConversion(typeof(Employee), typeof(Brush))] /// class MyConverter : IValueConverter /// { /// public object Convert(object value, Type targetType, object parameter, CultureInfo culture) /// { /// if (value is Dev) return Brushes.Beige; /// if (value is Employee) return Brushes.Salmon; /// return Brushes.Yellow; /// } /// } ///
////// Creates a new ValueConversionAttribute to indicate between /// what types of a data binding source and target this ValueConverter can convert. /// /// the expected source type this ValueConverter can handle /// the target type to which this ValueConverter can convert to public ValueConversionAttribute(Type sourceType, Type targetType) { if (sourceType == null) throw new ArgumentNullException("sourceType"); if (targetType == null) throw new ArgumentNullException("targetType"); _sourceType = sourceType; _targetType = targetType; } ////// The expected source type this ValueConverter can handle. /// public Type SourceType { get { return _sourceType; } } ////// The target type to which this ValueConverter can convert to. /// public Type TargetType { get { return _targetType; } } ////// The type of the optional ValueConverter Parameter object. /// public Type ParameterType { get { return _parameterType; } set { _parameterType = value; } } ////// Returns the unique identifier for this Attribute. /// // Type ID is used to remove redundant attributes by // putting all attributes in a dictionary of [TypeId, Attribute]. // If you want AllowMultiple attributes to work with designers, // you must override TypeId. The default implementation returns // this.GetType(), which is appropriate for AllowMultiple = false, but // not for AllowMultiple = true; public override object TypeId { // the attribute itself will be used as a key to the dictionary get { return this; } } ////// Returns the hash code for this instance. /// override public int GetHashCode() { // the default implementation does some funky enumeration over its fields // we can do better and use the 2 mandatory fields source/targetType's hash codes return _sourceType.GetHashCode() + _targetType.GetHashCode(); } //-------------------------------------------- // Private members //-------------------------------------------- private Type _sourceType; private Type _targetType; private Type _parameterType; } } // 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
- SiteOfOriginContainer.cs
- SqlRowUpdatedEvent.cs
- ReadOnlyHierarchicalDataSource.cs
- ComponentDispatcherThread.cs
- HotSpot.cs
- MsmqIntegrationBinding.cs
- WebScriptMetadataMessageEncodingBindingElement.cs
- TaskExtensions.cs
- TimeoutValidationAttribute.cs
- ViewStateException.cs
- IListConverters.cs
- DebugHandleTracker.cs
- ByteStorage.cs
- log.cs
- DesignerSerializationVisibilityAttribute.cs
- Visitors.cs
- EventArgs.cs
- XmlEntityReference.cs
- versioninfo.cs
- DataGridViewAutoSizeColumnModeEventArgs.cs
- ReadOnlyCollectionBase.cs
- DbReferenceCollection.cs
- DataViewListener.cs
- GACMembershipCondition.cs
- FunctionDefinition.cs
- AccessedThroughPropertyAttribute.cs
- PersonalizableTypeEntry.cs
- EncryptedHeaderXml.cs
- FormatSettings.cs
- SecurityRuntime.cs
- ChtmlPageAdapter.cs
- RuleInfoComparer.cs
- Environment.cs
- IndependentAnimationStorage.cs
- AlphaSortedEnumConverter.cs
- EntityTypeEmitter.cs
- KeyGestureValueSerializer.cs
- WindowsPrincipal.cs
- DoubleAnimationUsingKeyFrames.cs
- EntitySetBaseCollection.cs
- SkewTransform.cs
- MimeTypeAttribute.cs
- CurrentChangingEventArgs.cs
- SimpleColumnProvider.cs
- CustomActivityDesigner.cs
- KeyTimeConverter.cs
- DragEventArgs.cs
- NumberEdit.cs
- MimeFormatter.cs
- DateTimeValueSerializerContext.cs
- ReversePositionQuery.cs
- _ListenerAsyncResult.cs
- XmlDesignerDataSourceView.cs
- HttpBrowserCapabilitiesWrapper.cs
- Mouse.cs
- SoapFault.cs
- ExitEventArgs.cs
- SystemFonts.cs
- WebPartConnectionsConnectVerb.cs
- Rfc2898DeriveBytes.cs
- TemplateControl.cs
- SystemInformation.cs
- StrokeCollectionDefaultValueFactory.cs
- WebServiceResponseDesigner.cs
- LocationUpdates.cs
- TextCollapsingProperties.cs
- DesignerDataStoredProcedure.cs
- TextTreeRootNode.cs
- PolicyManager.cs
- ListView.cs
- XPathPatternBuilder.cs
- RectAnimationUsingKeyFrames.cs
- BamlBinaryReader.cs
- MemberRelationshipService.cs
- ZipIOFileItemStream.cs
- Cursors.cs
- VirtualizingPanel.cs
- OleDbRowUpdatedEvent.cs
- RecordManager.cs
- PreProcessor.cs
- odbcmetadatacolumnnames.cs
- TextEditorSelection.cs
- ToolStripGripRenderEventArgs.cs
- FontSizeConverter.cs
- WebResourceAttribute.cs
- CharacterMetrics.cs
- Latin1Encoding.cs
- DbgCompiler.cs
- TextElement.cs
- CacheOutputQuery.cs
- FixedDocument.cs
- Ticks.cs
- RoleService.cs
- SqlConnectionString.cs
- TypeSystem.cs
- NotImplementedException.cs
- Component.cs
- MessageQueuePermissionAttribute.cs
- IntSecurity.cs
- TrackingExtract.cs