HtmlToClrEventProxy.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / HtmlToClrEventProxy.cs / 1 / HtmlToClrEventProxy.cs
                        

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

 
using System; 
using System.ComponentModel;
using System.Diagnostics; 
using System.IO;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms; 
using System.Security.Permissions;
using System.Security; 
using System.Runtime.InteropServices; 
using System.Net;
using System.Globalization; 
using System.Collections;
using System.Reflection;

namespace System.Windows.Forms { 

 
    ///  
    ///  This class is here for IHTML*3.AttachHandler style eventing.
    ///  We need a way of routing requests for DISPID(0) to a particular CLR event without creating 
    ///  a public class.  In order to accomplish this we implement IReflect and handle InvokeMethod
    ///  to call back on a CLR event handler.
    /// 
 
    internal class HtmlToClrEventProxy : IReflect {
        private EventHandler eventHandler; 
        private IReflect typeIReflectImplementation; 
        private object sender = null;
        private string eventName; 

        public HtmlToClrEventProxy(object sender, string eventName, EventHandler eventHandler) {
            this.eventHandler = eventHandler;
            this.eventName = eventName; 

            Type htmlToClrEventProxyType = typeof(HtmlToClrEventProxy); 
            typeIReflectImplementation = htmlToClrEventProxyType as IReflect; 
        }
 
        public string EventName {
            get { return eventName; }
        }
 
        [DispId(0)]
        public void OnHtmlEvent() { 
            InvokeClrEvent(); 
        }
 
        private void InvokeClrEvent() {
            if (eventHandler != null) {
                eventHandler(sender, EventArgs.Empty);
            } 
        }
 
 
#region IReflect
 
        Type IReflect.UnderlyingSystemType {
            get {
                return typeIReflectImplementation.UnderlyingSystemType;
            } 
        }
 
        // Methods 
        System.Reflection.FieldInfo IReflect.GetField(string name, System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetField(name, bindingAttr); 
        }
        System.Reflection.FieldInfo[] IReflect.GetFields(System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetFields(bindingAttr);
        } 
        System.Reflection.MemberInfo[] IReflect.GetMember(string name, System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetMember(name, bindingAttr); 
        } 
        System.Reflection.MemberInfo[] IReflect.GetMembers(System.Reflection.BindingFlags bindingAttr){
            return typeIReflectImplementation.GetMembers(bindingAttr); 
        }
        System.Reflection.MethodInfo IReflect.GetMethod(string name, System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetMethod(name, bindingAttr);
        } 
        System.Reflection.MethodInfo IReflect.GetMethod(string name, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, Type[] types, System.Reflection.ParameterModifier[] modifiers) {
            return typeIReflectImplementation.GetMethod(name, bindingAttr, binder, types, modifiers); 
        } 
        System.Reflection.MethodInfo[] IReflect.GetMethods(System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetMethods(bindingAttr); 
        }
        System.Reflection.PropertyInfo[] IReflect.GetProperties(System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetProperties(bindingAttr);
        } 
        System.Reflection.PropertyInfo IReflect.GetProperty(string name, System.Reflection.BindingFlags bindingAttr) {
            return typeIReflectImplementation.GetProperty(name, bindingAttr); 
        } 
        System.Reflection.PropertyInfo IReflect.GetProperty(string name, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, Type returnType, Type[] types, System.Reflection.ParameterModifier[] modifiers) {
            return typeIReflectImplementation.GetProperty(name, bindingAttr, binder, returnType, types, modifiers); 
        }

        // InvokeMember:
        // If we get a call for DISPID=0, fire the CLR event. 
        //
        object IReflect.InvokeMember(string name, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object target, object[] args, System.Reflection.ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, string[] namedParameters) { 
 
            //
            if (name == "[DISPID=0]") { 
                // we know we're getting called back to fire the event - translate this now into a CLR event.
                OnHtmlEvent();
                // since there's no return value for void, return null.
                return null; 
            }
            else { 
                return typeIReflectImplementation.InvokeMember(name, invokeAttr, binder, target, args, modifiers, culture, namedParameters); 
            }
        } 
        #endregion
    }
}

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

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK