Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / 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: [....]/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
- ClipboardData.cs
- TcpTransportSecurity.cs
- WebServiceTypeData.cs
- Hyperlink.cs
- RuntimeTrackingProfile.cs
- DesignerActionPanel.cs
- EntityDataSourceSelectedEventArgs.cs
- FlowLayout.cs
- TypeToArgumentTypeConverter.cs
- FontSourceCollection.cs
- SqlRowUpdatedEvent.cs
- BufferCache.cs
- DataQuery.cs
- CompressionTransform.cs
- X509Certificate2Collection.cs
- SecurityUtils.cs
- safelink.cs
- PlainXmlWriter.cs
- XPathSelfQuery.cs
- HostExecutionContextManager.cs
- Events.cs
- WorkflowPersistenceService.cs
- CharStorage.cs
- Drawing.cs
- UnauthorizedAccessException.cs
- EncodingConverter.cs
- DetailsViewActionList.cs
- BooleanAnimationBase.cs
- ManagedWndProcTracker.cs
- ExpressionConverter.cs
- Rotation3DAnimation.cs
- AppDomainAttributes.cs
- EditorPart.cs
- PositiveTimeSpanValidator.cs
- DataGridTable.cs
- PrinterUnitConvert.cs
- VisualStyleElement.cs
- FileDialogCustomPlace.cs
- GradientStop.cs
- WhiteSpaceTrimStringConverter.cs
- HttpDigestClientElement.cs
- Comparer.cs
- BuilderPropertyEntry.cs
- FtpWebResponse.cs
- PopupRootAutomationPeer.cs
- LicenseException.cs
- BuildProvider.cs
- QilPatternFactory.cs
- TranslateTransform.cs
- LambdaCompiler.Generated.cs
- Transform.cs
- LicenseManager.cs
- TreeViewItemAutomationPeer.cs
- HideDisabledControlAdapter.cs
- VScrollProperties.cs
- XmlEntity.cs
- UTF8Encoding.cs
- AuthenticationConfig.cs
- SoapSchemaMember.cs
- DataTemplate.cs
- Listbox.cs
- WebHeaderCollection.cs
- LocalTransaction.cs
- SafeLibraryHandle.cs
- WebRequest.cs
- odbcmetadatafactory.cs
- SignHashRequest.cs
- ModuleBuilder.cs
- Viewport2DVisual3D.cs
- NumericUpDownAccelerationCollection.cs
- PropertyCollection.cs
- DataGridViewRowsAddedEventArgs.cs
- DataGridCommandEventArgs.cs
- FunctionQuery.cs
- StateItem.cs
- activationcontext.cs
- PasswordRecoveryAutoFormat.cs
- MenuStrip.cs
- UidManager.cs
- BaseValidator.cs
- DeferrableContentConverter.cs
- SchemaImporterExtensionElementCollection.cs
- ECDsaCng.cs
- DTCTransactionManager.cs
- AssignDesigner.xaml.cs
- TextureBrush.cs
- XPathNavigatorReader.cs
- PropertyChangeTracker.cs
- TextServicesManager.cs
- ServiceDescriptionImporter.cs
- DataGridTable.cs
- SubstitutionResponseElement.cs
- HtmlTableCellCollection.cs
- Renderer.cs
- Sorting.cs
- Color.cs
- MetadataPropertyAttribute.cs
- AliasExpr.cs
- TemplateParser.cs
- LoginNameDesigner.cs