Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Base / MS / Internal / ComponentModel / AttachedPropertyMethodSelector.cs / 1 / AttachedPropertyMethodSelector.cs
namespace MS.Internal.ComponentModel { using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Security.Permissions; using System.Windows; ////// This is a reflection binder that is used to /// find the right method match for attached properties. /// The default binder in the CLR will not find a /// method match unless the parameters we provide are /// exact matches. This binder will use compatible type /// matching to find a match for any parameters that are /// compatible. /// internal class AttachedPropertyMethodSelector : Binder { ////// The only method we implement. Our goal here is to find a method that best matches the arguments passed. /// We are doing this only with the intent of pulling attached property metadata off of the method. /// If there are ambiguous methods, we simply take the first one as all "Get" methods for an attached /// property should have identical metadata. /// public override MethodBase SelectMethod(BindingFlags bindingAttr, MethodBase[] match, Type[] types, ParameterModifier[] modifiers) { // Short circuit for cases where someone didn't pass in a types array. if (types == null) { if (match.Length > 1) { throw new AmbiguousMatchException(); } else { return match[0]; } } for(int idx = 0; idx < match.Length; idx++) { MethodBase candidate = match[idx]; ParameterInfo[] parameters = candidate.GetParameters(); if (ParametersMatch(parameters, types)) { return candidate; } } return null; } ////// This method checks that the parameters passed in are /// compatible with the provided parameter types. /// private static bool ParametersMatch(ParameterInfo[] parameters, Type[] types) { if (parameters.Length != types.Length) { return false; } // IsAssignableFrom is not cheap. Do this in two passes. // Our first pass checks for exact type matches. Only on // the second pass do we do an IsAssignableFrom. bool compat = true; for(int idx = 0; idx < parameters.Length; idx++) { ParameterInfo p = parameters[idx]; Type t = types[idx]; if (p.ParameterType != t) { compat = false; break; } } if (compat) { return true; } // Second pass uses IsAssignableFrom to check for compatible types. compat = true; for(int idx = 0; idx < parameters.Length; idx++) { ParameterInfo p = parameters[idx]; Type t = types[idx]; if (!t.IsAssignableFrom(p.ParameterType)) { compat = false; break; } } return compat; } ////// We do not implement this. /// public override MethodBase BindToMethod(BindingFlags bindingAttr, MethodBase[] match, ref object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] names, out object state) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override FieldInfo BindToField(BindingFlags bindingAttr, FieldInfo[] match, object value, CultureInfo culture) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override object ChangeType(object value, Type type, CultureInfo culture) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override void ReorderArgumentArray(ref object[] args, object state) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override PropertyInfo SelectProperty(BindingFlags bindingAttr, PropertyInfo[] match, Type returnType, Type[] indexes, ParameterModifier[] modifiers) { // We are only a method binder. throw new NotImplementedException(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. namespace MS.Internal.ComponentModel { using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Reflection; using System.Security.Permissions; using System.Windows; ////// This is a reflection binder that is used to /// find the right method match for attached properties. /// The default binder in the CLR will not find a /// method match unless the parameters we provide are /// exact matches. This binder will use compatible type /// matching to find a match for any parameters that are /// compatible. /// internal class AttachedPropertyMethodSelector : Binder { ////// The only method we implement. Our goal here is to find a method that best matches the arguments passed. /// We are doing this only with the intent of pulling attached property metadata off of the method. /// If there are ambiguous methods, we simply take the first one as all "Get" methods for an attached /// property should have identical metadata. /// public override MethodBase SelectMethod(BindingFlags bindingAttr, MethodBase[] match, Type[] types, ParameterModifier[] modifiers) { // Short circuit for cases where someone didn't pass in a types array. if (types == null) { if (match.Length > 1) { throw new AmbiguousMatchException(); } else { return match[0]; } } for(int idx = 0; idx < match.Length; idx++) { MethodBase candidate = match[idx]; ParameterInfo[] parameters = candidate.GetParameters(); if (ParametersMatch(parameters, types)) { return candidate; } } return null; } ////// This method checks that the parameters passed in are /// compatible with the provided parameter types. /// private static bool ParametersMatch(ParameterInfo[] parameters, Type[] types) { if (parameters.Length != types.Length) { return false; } // IsAssignableFrom is not cheap. Do this in two passes. // Our first pass checks for exact type matches. Only on // the second pass do we do an IsAssignableFrom. bool compat = true; for(int idx = 0; idx < parameters.Length; idx++) { ParameterInfo p = parameters[idx]; Type t = types[idx]; if (p.ParameterType != t) { compat = false; break; } } if (compat) { return true; } // Second pass uses IsAssignableFrom to check for compatible types. compat = true; for(int idx = 0; idx < parameters.Length; idx++) { ParameterInfo p = parameters[idx]; Type t = types[idx]; if (!t.IsAssignableFrom(p.ParameterType)) { compat = false; break; } } return compat; } ////// We do not implement this. /// public override MethodBase BindToMethod(BindingFlags bindingAttr, MethodBase[] match, ref object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] names, out object state) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override FieldInfo BindToField(BindingFlags bindingAttr, FieldInfo[] match, object value, CultureInfo culture) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override object ChangeType(object value, Type type, CultureInfo culture) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override void ReorderArgumentArray(ref object[] args, object state) { // We are only a method binder. throw new NotImplementedException(); } ////// We do not implement this. /// public override PropertyInfo SelectProperty(BindingFlags bindingAttr, PropertyInfo[] match, Type returnType, Type[] indexes, ParameterModifier[] modifiers) { // We are only a method binder. throw new NotImplementedException(); } } } // 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
- SimplePropertyEntry.cs
- BasicHttpMessageSecurityElement.cs
- PriorityBinding.cs
- PresentationAppDomainManager.cs
- DesignerOptionService.cs
- QfeChecker.cs
- FixedDSBuilder.cs
- DocumentOrderComparer.cs
- Content.cs
- ToolStripPanelCell.cs
- DataControlField.cs
- ServiceReflector.cs
- HelpEvent.cs
- Point3DAnimationUsingKeyFrames.cs
- ProjectionCamera.cs
- DocumentPageView.cs
- ArrayElementGridEntry.cs
- MobileUITypeEditor.cs
- NavigationEventArgs.cs
- ImageField.cs
- SamlSerializer.cs
- UIServiceHelper.cs
- XmlAttributes.cs
- DataList.cs
- SafeNativeMethods.cs
- ConnectionPool.cs
- xdrvalidator.cs
- MessageEventSubscriptionService.cs
- AnimatedTypeHelpers.cs
- ClientOptions.cs
- Span.cs
- StaticExtension.cs
- Slider.cs
- ChangePassword.cs
- httpserverutility.cs
- CompareValidator.cs
- HtmlImage.cs
- DataGridViewColumnStateChangedEventArgs.cs
- WebBrowserNavigatingEventHandler.cs
- Frame.cs
- DbgUtil.cs
- DateTimeEditor.cs
- Visitors.cs
- Decimal.cs
- ClosableStream.cs
- FixedSOMPage.cs
- TrustLevelCollection.cs
- DataService.cs
- XmlSecureResolver.cs
- WebSysDescriptionAttribute.cs
- FileUtil.cs
- WebPartHeaderCloseVerb.cs
- Int64Storage.cs
- oledbconnectionstring.cs
- Privilege.cs
- WebMessageFormatHelper.cs
- SqlNodeAnnotations.cs
- OutputCacheSection.cs
- securitycriticaldataformultiplegetandset.cs
- BinaryObjectWriter.cs
- ImageCollectionCodeDomSerializer.cs
- RouteValueExpressionBuilder.cs
- DataControlButton.cs
- QueryInterceptorAttribute.cs
- TransformDescriptor.cs
- X509UI.cs
- StructuredTypeEmitter.cs
- RegexCompiler.cs
- Material.cs
- DataGridItemAutomationPeer.cs
- TransactionTraceIdentifier.cs
- StructuralObject.cs
- XmlSchemaDatatype.cs
- SqlDataSourceSelectingEventArgs.cs
- XmlAttributes.cs
- translator.cs
- PointAnimationUsingPath.cs
- PackagePart.cs
- TypeSystem.cs
- UniqueIdentifierService.cs
- FormsAuthenticationModule.cs
- FontWeights.cs
- DataGridViewColumnTypeEditor.cs
- ResizeGrip.cs
- ElementHostAutomationPeer.cs
- MediaCommands.cs
- SQLInt16.cs
- SslStream.cs
- EventLogPermission.cs
- CapabilitiesUse.cs
- SQLCharsStorage.cs
- SizeKeyFrameCollection.cs
- PagerSettings.cs
- RuntimeCompatibilityAttribute.cs
- CodeSnippetExpression.cs
- OracleRowUpdatedEventArgs.cs
- IPAddress.cs
- SubMenuStyleCollection.cs
- WebContext.cs
- ExceptionUtility.cs