ArglessEventHandlerProxy.cs source code in C# .NET

                        
Code:
                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Util / ArglessEventHandlerProxy.cs / 1305376 / ArglessEventHandlerProxy.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Util { 
    using System; 
    using System.Reflection;
    using System.Reflection.Emit; 
    using System.Security.Permissions;
    using System.Security;

/* 
 * Proxy that provides EventHandler and redirects it to arg-less method on the given object
 */ 
    internal class ArglessEventHandlerProxy { 
        private Object _target;
        private MethodInfo _arglessMethod; 

        internal ArglessEventHandlerProxy(Object target, MethodInfo arglessMethod) {
            Debug.Assert(arglessMethod.GetParameters().Length == 0);
 
            _target = target;
            _arglessMethod = arglessMethod; 
        } 

        [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.RestrictedMemberAccess)] 
        internal void Callback(Object sender, EventArgs e) {
            _arglessMethod.Invoke(_target, new Object[0]);
        }
 
        internal EventHandler Handler {
            get { 
                return new EventHandler(Callback); 
            }
        } 
    }

    internal delegate void VoidMethod();
 
    internal class CalliEventHandlerDelegateProxy {
        private IntPtr _functionPointer; 
        private Object _target; 
        private bool _argless;
 
        internal CalliEventHandlerDelegateProxy(Object target, IntPtr functionPointer, bool argless) {
            _argless = argless;
            _target = target;
            _functionPointer = functionPointer; 
        }
 
        internal void Callback(Object sender, EventArgs e) { 
            if (_argless) {
                System.Web.Util.CalliHelper.ArglessFunctionCaller(_functionPointer, _target); 
            }
            else {
                System.Web.Util.CalliHelper.EventArgFunctionCaller(_functionPointer, _target, sender, e);
            } 
        }
 
        internal EventHandler Handler { 
            get {
                return new EventHandler(Callback); 
            }
        }
    }
 
#if LCG_Implementation
    internal delegate void ArglessMethod(IntPtr methodPtr, Object target); 
    internal delegate void EventArgMethod(IntPtr methodPtr, Object target, Object source, EventArgs e); 

    internal class CalliHelper { 
        internal static ArglessMethod ArglessFunctionCaller;
        internal static EventArgMethod EventArgFunctionCaller;

        // Make sure we have reflection permission to use ReflectionEmit and access method 
        [ReflectionPermission(SecurityAction.Assert, Flags = ReflectionPermissionFlag.ReflectionEmit | ReflectionPermissionFlag.MemberAccess)]
        static CalliHelper() { 
            // generate void(void) calli 
            DynamicMethod dm = new DynamicMethod("void_calli",
                                                    typeof(void), 
                                                    new Type[] { typeof(IntPtr) /* function ptr */, typeof(Object) /* target */},
                                                    typeof(CalliHelper).Module);
            ILGenerator ilg = dm.GetILGenerator();
 
            ilg.Emit(OpCodes.Ldarg_1);
            ilg.Emit(OpCodes.Ldarg_0); 
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[0], null); 
            ilg.Emit(OpCodes.Ret);
            ArglessFunctionCaller = (ArglessMethod)dm.CreateDelegate(typeof(ArglessMethod)); 

            // generate void(Object, EventArgs) calli
            dm = new DynamicMethod("eventarg_calli",
                                    typeof(void), 
                                    new Type[] { typeof(IntPtr) /* function ptr */, typeof(Object) /* target */, typeof(Object) /* sender */, typeof(EventArgs) },
                                    typeof(CalliHelper).Module); 
            ilg = dm.GetILGenerator(); 

            ilg.Emit(OpCodes.Ldarg_1); 
            ilg.Emit(OpCodes.Ldarg_2);
            ilg.Emit(OpCodes.Ldarg_3);
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[] { typeof(object) /* sender */, typeof(EventArgs) }, null); 
            ilg.Emit(OpCodes.Ret);
            EventArgFunctionCaller = (EventArgMethod)dm.CreateDelegate(typeof(EventArgMethod)); 
        } 
    }
#endif //LCG_Implementation 

#if  Reflection_Emit_Implementation
    internal delegate void ArglessMethod(IntPtr methodPtr, Object target);
    internal delegate void EventArgMethod(IntPtr methodPtr, Object target, Object source, EventArgs e); 

    internal class CalliHelper { 
 
        internal static ArglessMethod ArglessFunctionCaller;
        internal static EventArgMethod EventArgFunctionCaller; 

        // Make sure we have reflection permission to use ReflectionEmit and access method
        [ReflectionPermission(SecurityAction.Assert, Flags = ReflectionPermissionFlag.ReflectionEmit | ReflectionPermissionFlag.MemberAccess)]
        static CalliHelper() { 

            AssemblyName an = new AssemblyName("CalliHelper"); 
            AssemblyBuilder ab = AppDomain.CurrentDomain.DefineDynamicAssembly(an, AssemblyBuilderAccess.Run); 
            ModuleBuilder mb = ab.DefineDynamicModule("CalliHelper.dll");
 
            ConstructorInfo ci = typeof(CLSCompliantAttribute).GetConstructor(new Type[] { typeof(bool) });
            CustomAttributeBuilder cb = new CustomAttributeBuilder(ci, new object[] { true });
            mb.SetCustomAttribute(cb);
 
            TypeBuilder tb = mb.DefineType("System.Web.Util.CalliHelper", TypeAttributes.NotPublic | TypeAttributes.Sealed);
            MethodBuilder methb = tb.DefineMethod("EventArgMethod", MethodAttributes.Assembly | MethodAttributes.Static, typeof(void), new Type[] { typeof(IntPtr), typeof(object), typeof(object), typeof(EventArgs) }); 
            ILGenerator ilg = methb.GetILGenerator(); 

            ilg.Emit(OpCodes.Ldarg_1); 
            ilg.Emit(OpCodes.Ldarg_2);
            ilg.Emit(OpCodes.Ldarg_3);
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[] { typeof(object), typeof(EventArgs) }, null); 
            ilg.Emit(OpCodes.Ret);
 
            methb = tb.DefineMethod("ArglessMethod", MethodAttributes.Assembly | MethodAttributes.Static, typeof(void), new Type[] { typeof (IntPtr), typeof(object) }); 
            ilg = methb.GetILGenerator();
 
            ilg.Emit(OpCodes.Ldarg_1);
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[0], null);
            ilg.Emit(OpCodes.Ret); 

            Type t = tb.CreateType(); 
            ArglessFunctionCaller = (ArglessMethod)Delegate.CreateDelegate(typeof(ArglessMethod), t, "ArglessMethod", true); 
            EventArgFunctionCaller = (EventArgMethod)Delegate.CreateDelegate(typeof(EventArgMethod), t, "EventArgMethod", true);
 
            //ab.Save("CalliHelper.dll");
        }
    }
#endif // Reflection_Emit_Implementation 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Util { 
    using System; 
    using System.Reflection;
    using System.Reflection.Emit; 
    using System.Security.Permissions;
    using System.Security;

/* 
 * Proxy that provides EventHandler and redirects it to arg-less method on the given object
 */ 
    internal class ArglessEventHandlerProxy { 
        private Object _target;
        private MethodInfo _arglessMethod; 

        internal ArglessEventHandlerProxy(Object target, MethodInfo arglessMethod) {
            Debug.Assert(arglessMethod.GetParameters().Length == 0);
 
            _target = target;
            _arglessMethod = arglessMethod; 
        } 

        [ReflectionPermission(SecurityAction.Assert, Flags=ReflectionPermissionFlag.RestrictedMemberAccess)] 
        internal void Callback(Object sender, EventArgs e) {
            _arglessMethod.Invoke(_target, new Object[0]);
        }
 
        internal EventHandler Handler {
            get { 
                return new EventHandler(Callback); 
            }
        } 
    }

    internal delegate void VoidMethod();
 
    internal class CalliEventHandlerDelegateProxy {
        private IntPtr _functionPointer; 
        private Object _target; 
        private bool _argless;
 
        internal CalliEventHandlerDelegateProxy(Object target, IntPtr functionPointer, bool argless) {
            _argless = argless;
            _target = target;
            _functionPointer = functionPointer; 
        }
 
        internal void Callback(Object sender, EventArgs e) { 
            if (_argless) {
                System.Web.Util.CalliHelper.ArglessFunctionCaller(_functionPointer, _target); 
            }
            else {
                System.Web.Util.CalliHelper.EventArgFunctionCaller(_functionPointer, _target, sender, e);
            } 
        }
 
        internal EventHandler Handler { 
            get {
                return new EventHandler(Callback); 
            }
        }
    }
 
#if LCG_Implementation
    internal delegate void ArglessMethod(IntPtr methodPtr, Object target); 
    internal delegate void EventArgMethod(IntPtr methodPtr, Object target, Object source, EventArgs e); 

    internal class CalliHelper { 
        internal static ArglessMethod ArglessFunctionCaller;
        internal static EventArgMethod EventArgFunctionCaller;

        // Make sure we have reflection permission to use ReflectionEmit and access method 
        [ReflectionPermission(SecurityAction.Assert, Flags = ReflectionPermissionFlag.ReflectionEmit | ReflectionPermissionFlag.MemberAccess)]
        static CalliHelper() { 
            // generate void(void) calli 
            DynamicMethod dm = new DynamicMethod("void_calli",
                                                    typeof(void), 
                                                    new Type[] { typeof(IntPtr) /* function ptr */, typeof(Object) /* target */},
                                                    typeof(CalliHelper).Module);
            ILGenerator ilg = dm.GetILGenerator();
 
            ilg.Emit(OpCodes.Ldarg_1);
            ilg.Emit(OpCodes.Ldarg_0); 
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[0], null); 
            ilg.Emit(OpCodes.Ret);
            ArglessFunctionCaller = (ArglessMethod)dm.CreateDelegate(typeof(ArglessMethod)); 

            // generate void(Object, EventArgs) calli
            dm = new DynamicMethod("eventarg_calli",
                                    typeof(void), 
                                    new Type[] { typeof(IntPtr) /* function ptr */, typeof(Object) /* target */, typeof(Object) /* sender */, typeof(EventArgs) },
                                    typeof(CalliHelper).Module); 
            ilg = dm.GetILGenerator(); 

            ilg.Emit(OpCodes.Ldarg_1); 
            ilg.Emit(OpCodes.Ldarg_2);
            ilg.Emit(OpCodes.Ldarg_3);
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[] { typeof(object) /* sender */, typeof(EventArgs) }, null); 
            ilg.Emit(OpCodes.Ret);
            EventArgFunctionCaller = (EventArgMethod)dm.CreateDelegate(typeof(EventArgMethod)); 
        } 
    }
#endif //LCG_Implementation 

#if  Reflection_Emit_Implementation
    internal delegate void ArglessMethod(IntPtr methodPtr, Object target);
    internal delegate void EventArgMethod(IntPtr methodPtr, Object target, Object source, EventArgs e); 

    internal class CalliHelper { 
 
        internal static ArglessMethod ArglessFunctionCaller;
        internal static EventArgMethod EventArgFunctionCaller; 

        // Make sure we have reflection permission to use ReflectionEmit and access method
        [ReflectionPermission(SecurityAction.Assert, Flags = ReflectionPermissionFlag.ReflectionEmit | ReflectionPermissionFlag.MemberAccess)]
        static CalliHelper() { 

            AssemblyName an = new AssemblyName("CalliHelper"); 
            AssemblyBuilder ab = AppDomain.CurrentDomain.DefineDynamicAssembly(an, AssemblyBuilderAccess.Run); 
            ModuleBuilder mb = ab.DefineDynamicModule("CalliHelper.dll");
 
            ConstructorInfo ci = typeof(CLSCompliantAttribute).GetConstructor(new Type[] { typeof(bool) });
            CustomAttributeBuilder cb = new CustomAttributeBuilder(ci, new object[] { true });
            mb.SetCustomAttribute(cb);
 
            TypeBuilder tb = mb.DefineType("System.Web.Util.CalliHelper", TypeAttributes.NotPublic | TypeAttributes.Sealed);
            MethodBuilder methb = tb.DefineMethod("EventArgMethod", MethodAttributes.Assembly | MethodAttributes.Static, typeof(void), new Type[] { typeof(IntPtr), typeof(object), typeof(object), typeof(EventArgs) }); 
            ILGenerator ilg = methb.GetILGenerator(); 

            ilg.Emit(OpCodes.Ldarg_1); 
            ilg.Emit(OpCodes.Ldarg_2);
            ilg.Emit(OpCodes.Ldarg_3);
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[] { typeof(object), typeof(EventArgs) }, null); 
            ilg.Emit(OpCodes.Ret);
 
            methb = tb.DefineMethod("ArglessMethod", MethodAttributes.Assembly | MethodAttributes.Static, typeof(void), new Type[] { typeof (IntPtr), typeof(object) }); 
            ilg = methb.GetILGenerator();
 
            ilg.Emit(OpCodes.Ldarg_1);
            ilg.Emit(OpCodes.Ldarg_0);
            ilg.EmitCalli(OpCodes.Calli, CallingConventions.HasThis, typeof(void), new Type[0], null);
            ilg.Emit(OpCodes.Ret); 

            Type t = tb.CreateType(); 
            ArglessFunctionCaller = (ArglessMethod)Delegate.CreateDelegate(typeof(ArglessMethod), t, "ArglessMethod", true); 
            EventArgFunctionCaller = (EventArgMethod)Delegate.CreateDelegate(typeof(EventArgMethod), t, "EventArgMethod", true);
 
            //ab.Save("CalliHelper.dll");
        }
    }
#endif // Reflection_Emit_Implementation 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

                        

                        

                        
                        

Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK

• PieceNameHelper.cs
• SwitchCase.cs
• RequiredAttributeAttribute.cs
• OverrideMode.cs
• SpeechSynthesizer.cs
• NewArrayExpression.cs
• ConfigsHelper.cs
• SingleKeyFrameCollection.cs
• ParsedRoute.cs
• SqlUtil.cs
• XmlFormatMapping.cs
• Propagator.Evaluator.cs
• WebPartMenu.cs
• RegisteredDisposeScript.cs
• ViewRendering.cs
• SecurityHelper.cs
• VerificationAttribute.cs
• ColorTransform.cs
• CompositeFontInfo.cs
• MetadataCache.cs
• CellPartitioner.cs
• AxHost.cs
• AnnouncementClient.cs
• EmbeddedObject.cs
• Point3DAnimationUsingKeyFrames.cs
• DataServiceRequestOfT.cs
• RuntimeIdentifierPropertyAttribute.cs
• TextDocumentView.cs
• CallbackDebugElement.cs
• TimeSpan.cs
• ScriptBehaviorDescriptor.cs
• PolicyStatement.cs
• FontClient.cs
• StrongNameSignatureInformation.cs
• ScalarType.cs
• HostedHttpTransportManager.cs
• filewebrequest.cs
• SortedDictionary.cs
• CqlWriter.cs
• iisPickupDirectory.cs
• QilUnary.cs
• PageThemeCodeDomTreeGenerator.cs
• Baml2006SchemaContext.cs
• ActivityDesigner.cs
• Metafile.cs
• MessagePropertyFilter.cs
• Color.cs
• SafeNativeMethods.cs
• JsonClassDataContract.cs
• TextAutomationPeer.cs
• Rotation3DAnimation.cs
• WebPartUserCapability.cs
• x509utils.cs
• StylusPointPropertyInfoDefaults.cs
• VisualStyleTypesAndProperties.cs
• AdditionalEntityFunctions.cs
• Parallel.cs
• COM2PropertyBuilderUITypeEditor.cs
• GridErrorDlg.cs
• CodeDOMProvider.cs
• XmlNodeComparer.cs
• SystemColors.cs
• JsonServiceDocumentSerializer.cs
• SQLGuidStorage.cs
• CheckPair.cs
• XmlSchemaObject.cs
• HyperLink.cs
• FormsAuthenticationTicket.cs
• StringFreezingAttribute.cs
• TraceInternal.cs
• StreamGeometryContext.cs
• UICuesEvent.cs
• DesignSurface.cs
• Code.cs
• InternalControlCollection.cs
• X509RecipientCertificateServiceElement.cs
• SaveFileDialogDesigner.cs
• Substitution.cs
• TimeStampChecker.cs
• FolderNameEditor.cs
• RequestNavigateEventArgs.cs
• Utils.cs
• QilXmlWriter.cs
• CookieHandler.cs
• ConfigurationSettings.cs
• COM2Properties.cs
• CompressionTransform.cs
• JapaneseLunisolarCalendar.cs
• Constants.cs
• WmpBitmapDecoder.cs
• SystemTcpConnection.cs
• ContainerVisual.cs
• ResXResourceReader.cs
• InteropBitmapSource.cs
• ObjectHelper.cs
• Pkcs9Attribute.cs
• GroupBox.cs
• HttpListenerResponse.cs
• RunInstallerAttribute.cs
• SQLChars.cs