Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Base / System / Windows / AttachedPropertyBrowsableForTypeAttribute.cs / 1 / AttachedPropertyBrowsableForTypeAttribute.cs
namespace System.Windows { using System; ////// This class declares that an attached property is browsable only /// for dependency objects that derive from the given type. If more /// than one type is specified, the property is browsable if any type /// matches (logical or). The type may also be an interface. /// [AttributeUsage(AttributeTargets.Method, AllowMultiple = true)] public sealed class AttachedPropertyBrowsableForTypeAttribute : AttachedPropertyBrowsableAttribute { //------------------------------------------------------ // // Constructors // //----------------------------------------------------- ////// Creates a new AttachedPropertyBrowsableForTypeAttribute. Provide the type /// you want the attached property to be browsable for. Multiple /// attributes may be used to provide support for more than one /// type. /// public AttachedPropertyBrowsableForTypeAttribute(Type targetType) { if (targetType == null) throw new ArgumentNullException("targetType"); _targetType = targetType; } //----------------------------------------------------- // // Public Properties // //----------------------------------------------------- ////// Returns the type passed into the constructor. /// public Type TargetType { get { return _targetType; } } ////// For AllowMultiple attributes, TypeId must be unique for /// each unique instance. The default returns the type, which /// is only correct for AllowMultiple == false. /// public override object TypeId { get { return this; } } //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- ////// Overrides Object.Equals to implement correct equality semantics for this /// attribute. /// public override bool Equals(object obj) { AttachedPropertyBrowsableForTypeAttribute other = obj as AttachedPropertyBrowsableForTypeAttribute; if (other == null) return false; return _targetType == other._targetType; } ////// Overrides Object.GetHashCode to implement correct hashing semantics. /// public override int GetHashCode() { return _targetType.GetHashCode(); } //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ ////// Returns true if the dependency object passed to the method is a type, /// subtype or implememts the interface of any of the the types contained /// in this object. /// internal override bool IsBrowsable(DependencyObject d, DependencyProperty dp) { if (d == null) throw new ArgumentNullException("d"); if (dp == null) throw new ArgumentNullException("dp"); // Get the dependency object type for our target type. // We cannot assume the user didn't do something wrong and // feed us a type that is not a dependency object, but that is // rare enough that it is worth the try/catch here rather than // a double IsAssignableFrom (one here, and one in DependencyObjectType). // We still use a flag here rather than checking for a null // _dTargetType so that a bad property that throws won't consistently // slow the system down with ArgumentExceptions. if (!_dTargetTypeChecked) { try { _dTargetType = DependencyObjectType.FromSystemType(_targetType); } catch(ArgumentException) { } _dTargetTypeChecked = true; } if (_dTargetType != null && _dTargetType.IsInstanceOfType(d)) { return true; } return false; } ////// Returns true if a browsable match is true if any one of multiple /// instances of the same type return true for IsBrowsable. We override /// this to return true because any one of a successfull match for /// IsBrowsable is accepted. /// internal override bool UnionResults { get { return true; } } //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ private Type _targetType; private DependencyObjectType _dTargetType; private bool _dTargetTypeChecked; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. namespace System.Windows { using System; ////// This class declares that an attached property is browsable only /// for dependency objects that derive from the given type. If more /// than one type is specified, the property is browsable if any type /// matches (logical or). The type may also be an interface. /// [AttributeUsage(AttributeTargets.Method, AllowMultiple = true)] public sealed class AttachedPropertyBrowsableForTypeAttribute : AttachedPropertyBrowsableAttribute { //------------------------------------------------------ // // Constructors // //----------------------------------------------------- ////// Creates a new AttachedPropertyBrowsableForTypeAttribute. Provide the type /// you want the attached property to be browsable for. Multiple /// attributes may be used to provide support for more than one /// type. /// public AttachedPropertyBrowsableForTypeAttribute(Type targetType) { if (targetType == null) throw new ArgumentNullException("targetType"); _targetType = targetType; } //----------------------------------------------------- // // Public Properties // //----------------------------------------------------- ////// Returns the type passed into the constructor. /// public Type TargetType { get { return _targetType; } } ////// For AllowMultiple attributes, TypeId must be unique for /// each unique instance. The default returns the type, which /// is only correct for AllowMultiple == false. /// public override object TypeId { get { return this; } } //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- ////// Overrides Object.Equals to implement correct equality semantics for this /// attribute. /// public override bool Equals(object obj) { AttachedPropertyBrowsableForTypeAttribute other = obj as AttachedPropertyBrowsableForTypeAttribute; if (other == null) return false; return _targetType == other._targetType; } ////// Overrides Object.GetHashCode to implement correct hashing semantics. /// public override int GetHashCode() { return _targetType.GetHashCode(); } //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ ////// Returns true if the dependency object passed to the method is a type, /// subtype or implememts the interface of any of the the types contained /// in this object. /// internal override bool IsBrowsable(DependencyObject d, DependencyProperty dp) { if (d == null) throw new ArgumentNullException("d"); if (dp == null) throw new ArgumentNullException("dp"); // Get the dependency object type for our target type. // We cannot assume the user didn't do something wrong and // feed us a type that is not a dependency object, but that is // rare enough that it is worth the try/catch here rather than // a double IsAssignableFrom (one here, and one in DependencyObjectType). // We still use a flag here rather than checking for a null // _dTargetType so that a bad property that throws won't consistently // slow the system down with ArgumentExceptions. if (!_dTargetTypeChecked) { try { _dTargetType = DependencyObjectType.FromSystemType(_targetType); } catch(ArgumentException) { } _dTargetTypeChecked = true; } if (_dTargetType != null && _dTargetType.IsInstanceOfType(d)) { return true; } return false; } ////// Returns true if a browsable match is true if any one of multiple /// instances of the same type return true for IsBrowsable. We override /// this to return true because any one of a successfull match for /// IsBrowsable is accepted. /// internal override bool UnionResults { get { return true; } } //----------------------------------------------------- // // Private Fields // //------------------------------------------------------ private Type _targetType; private DependencyObjectType _dTargetType; private bool _dTargetTypeChecked; } } // 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
- AsyncCodeActivityContext.cs
- CapacityStreamGeometryContext.cs
- TreeViewAutomationPeer.cs
- controlskin.cs
- DefaultPrintController.cs
- MouseOverProperty.cs
- FilteredDataSetHelper.cs
- CodeObject.cs
- ViewCellSlot.cs
- SvcMapFile.cs
- AppearanceEditorPart.cs
- SchemaAttDef.cs
- altserialization.cs
- TreeBuilderBamlTranslator.cs
- ValidationEventArgs.cs
- DocumentReferenceCollection.cs
- LocalsItemDescription.cs
- RouteCollection.cs
- DataGridCellClipboardEventArgs.cs
- PrimarySelectionGlyph.cs
- KnownColorTable.cs
- XmlEntityReference.cs
- DragDeltaEventArgs.cs
- ProcessInputEventArgs.cs
- DynamicRenderer.cs
- RotateTransform3D.cs
- messageonlyhwndwrapper.cs
- ScriptControl.cs
- IndexedEnumerable.cs
- CellParaClient.cs
- lengthconverter.cs
- AppDomainFactory.cs
- AddInServer.cs
- MimeFormReflector.cs
- StorageMappingFragment.cs
- HttpDictionary.cs
- DateTimeValueSerializer.cs
- BlurBitmapEffect.cs
- SQLResource.cs
- contentDescriptor.cs
- CodeExpressionCollection.cs
- ObjectDataSourceFilteringEventArgs.cs
- SerializeAbsoluteContext.cs
- CssStyleCollection.cs
- MappingSource.cs
- AssemblyBuilder.cs
- X509ServiceCertificateAuthentication.cs
- Buffer.cs
- SqlNamer.cs
- AppModelKnownContentFactory.cs
- WindowsGraphicsWrapper.cs
- SqlParameterizer.cs
- WinInet.cs
- TimeSpanStorage.cs
- HwndMouseInputProvider.cs
- XsdCachingReader.cs
- XmlNodeWriter.cs
- ScriptDescriptor.cs
- ColorInterpolationModeValidation.cs
- RelationshipConverter.cs
- StrokeRenderer.cs
- Error.cs
- WindowsBrush.cs
- AuthenticationServiceManager.cs
- ItemCollection.cs
- SqlDataSourceWizardForm.cs
- MediaPlayerState.cs
- PackWebResponse.cs
- WsatServiceAddress.cs
- FaultContractAttribute.cs
- AcceleratedTokenAuthenticator.cs
- ToolConsole.cs
- XmlCDATASection.cs
- EntityContainerEntitySet.cs
- PresentationTraceSources.cs
- HttpModuleActionCollection.cs
- XmlNamespaceMapping.cs
- ListItemCollection.cs
- PeerConnector.cs
- EventProxy.cs
- SQLRoleProvider.cs
- Point3DAnimationBase.cs
- AudienceUriMode.cs
- Membership.cs
- Marshal.cs
- MediaContextNotificationWindow.cs
- ResourceExpressionBuilder.cs
- SmtpReplyReaderFactory.cs
- CacheSection.cs
- XD.cs
- AxWrapperGen.cs
- InfoCardRSAPKCS1SignatureDeformatter.cs
- BamlBinaryWriter.cs
- RetrieveVirtualItemEventArgs.cs
- TreeNodeStyle.cs
- TemplatedAdorner.cs
- TextEffectResolver.cs
- DbFunctionCommandTree.cs
- Pair.cs
- StylusPlugin.cs