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刚从delphi转到c#，一切重头开始。上来先做个myBrowser,结果发现无法解决跳转到新窗口问题。从网上找到奇客力大侠的《C# webBrowser禁止在新窗口打开，强制在本窗口打开》文章（/da7_1@126/blog/static/10407267831651754880/），结果发现对重写WebBrowser一窍不通，折腾了2天，又找到百度知道里的一篇问答《在C#中如何重写控件》（/question/48991857.html?fr=qrl&cid=869&index=1&fr2=query），再几经周折才搞定。
为了纪念第一个C#程序的艰难问世，现将过程详细记录如下：一、在VS里用C#新建一个Windows窗体应用程序，起名为MyBrowser。二、在里面添加Label、TextBox、Button，然后整成如下图的样式，同时把各个控件的Anchor和Text归整一下，位置和名称放放好。三、重写WebBrowser组件，禁止跳转到IE新窗口。菜单“项目->添加类”，在模板中的“类”图标上确认一下，然后名称改为“ExtendedWebBrowser.cs”。（一）在右边解决方案管理器中右击“查看代码”，然后在ExtendedWebBrowser.cs代码窗口将代码修改成如下：using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace MyBrowser{public class ExtendedWebBrowser : System.Windows.Forms.WebBrowser{System.Windows.Forms.AxHost.ConnectionPointCookie cookie;WebBrowserExtendedEvents events;//This method will be called to give you a chance to create your own event sinkprotected override void CreateSink(){//MAKE SURE TO CALL THE BASE or the normal events won't firebase.CreateSink();events = new WebBrowserExtendedEvents(this);cookie = new System.Windows.Forms.AxHost.ConnectionPointCookie(this.ActiveXInstance, events, typeof(DWebBrowserEvents2));}protected override void DetachSink(){if (null != cookie){cookie.Disconnect();cookie = null;}base.DetachSink();}//This new event will fire when the page is navigatingpublic event EventHandler<WebBrowserExtendedNavigatingEventArgs> BeforeNavigate;public event EventHandler<WebBrowserExtendedNavigatingEventArgs> BeforeNewWindow;protected void OnBeforeNewWindow(string url, out bool cancel){EventHandler<WebBrowserExtendedNavigatingEventArgs> h = BeforeNewWindow;WebBrowserExtendedNavigatingEventArgs args = new WebBrowserExtendedNavigatingEventArgs(url, null);if (null != h){h(this, args);}cancel = args.Cancel;}protected void OnBeforeNavigate(string url, string frame, out bool cancel){EventHandler<WebBrowserExtendedNavigatingEventArgs> h = BeforeNavigate;WebBrowserExtendedNavigatingEventArgs args = new WebBrowserExtendedNavigatingEventArgs(url, frame);if (null != h){h(this, args);}//Pass the cancellation chosen back out to the eventscancel = args.Cancel;}//This class will capture events from the WebBrowserclass WebBrowserExtendedEvents : System.Runtime.InteropServices.StandardOleMarshalObject, DWebBrowserEvents2{ExtendedWebBrowser _Browser;public WebBrowserExtendedEvents(ExtendedWebBrowser browser) { _Browser = browser; }//Implement whichever events you wishpublic void BeforeNavigate2(object pDisp, ref object URL, ref object flags, ref object targetFrameName, ref object postData, ref object headers, ref bool cancel){_Browser.OnBeforeNavigate((string)URL, (string)targetFrameName, out cancel);}public void NewWindow3(object pDisp, ref bool cancel, ref object flags, ref object URLContext, ref object URL){_Browser.OnBeforeNewWindow((string)URL, out cancel);}}[System.Import(), System.Runtime.InteropServices.Guid("34A715A0-6587-11D0-924A-0020AFC7AC4D"),System.Runtime.InteropServices.InterfaceTypeAttribute(System.InterfaceType.InterfaceIsIDispatch),System.Runtime.InteropServices.TypeLibType(System.Runtime.InteropServices.TypeLibTypeFlags.FHidden)]public interface DWebBrowserEvents2{[System.Runtime.InteropServices.DispId(250)]void BeforeNavigate2([System.Runtime.InteropServices.In,System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.IDispatch)] object pDisp,[System.Runtime.InteropServices.In] ref object URL,[System.Runtime.InteropServices.In] ref object flags,[System.Runtime.InteropServices.In] ref object targetFrameName, [System.Runtime.InteropServices.In] ref object postData,[System.Runtime.InteropServices.In] ref object headers,[System.Runtime.InteropServices.In,System.Runtime.InteropServices.Out] ref bool cancel);[System.Runtime.InteropServices.DispId(273)]void NewWindow3([System.Runtime.InteropServices.In,System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.IDispatch)] object pDisp,[System.Runtime.InteropServices.In, System.Runtime.InteropServices.Out] ref bool cancel,[System.Runtime.InteropServices.In] ref object flags,[System.Runtime.InteropServices.In] ref object URLContext,[System.Runtime.InteropServices.In] ref object URL);}}public class WebBrowserExtendedNavigatingEventArgs : ponentModel.CancelEventArgs{private string _Url; //原文此处多了一个空格，注意修改之...散仙闪电注public string Url{get { return _Url; }}private string _Frame; //原文此处多了一个空格，注意修改之...散仙闪电注public string Frame{get { return _Frame; }}public WebBrowserExtendedNavigatingEventArgs(string url, string frame): base(){_Url = url;_Frame = frame;}}}(二)回到Form1.cs[设计]窗口，在菜单“生成”中，点“生成解决方案”。一会之后在工具箱的最上方就会出现一个新的组件“ExtendedWebBrowser”，这正是我们需要的，hehe。三、回到Form1.cs[设计]窗口，把ExtendedWebBrowser拖进来。(一)在属性窗口里调整好Anchor，使之能最大化。(二)双击“ScriptErrorSuppressed”，将之属性改为“True”以禁用所有的对话框，比如提示Activex下载、执行以及安全登录等对话框。当然可以参考MSDN上的代码示例（http://apps./share/detail/379735），有的放矢:private void browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e){((WebBrowser)sender).Document.Window.Error += new HtmlElementErrorEventHandler(Window_Error);}private void Window_Error(object sender, HtmlElementErrorEventArgs e){// Ignore the error and suppress the error dialog box. e.Handled = true;}(三)在ExtendedWebBrowser的事件里双击“BeforeNewWindow”并添加2行代码：private void extendedWebBrowser1_BeforeNewWindow(object sender, MyBrowser.WebBrowserExtendedNavigatingEventArgs e){e.Cancel=true;((ExtendedWebBrowser)sender).Navigate(e.Url);}(四)最后一步，回到Form1.cs[设计]窗口，双击Button按钮,添加代码如下：private void button1_Click(object sender, EventArgs e){extendedWebBrowser1.Navigate(textBox1.Text);}F5运行，点几个老跳的链接，oh~yeah,成功了!??，还有些不爽，输完网址后还要点登录，像IE一样敲一下回车就好了。说干就干(五)TextBox事件中，双击KeyPress(不要用Enter事件，试过不行)，添加以下代码private void textBox1_KeyPress(object sender, KeyPressEventArgs e){if (e.KeyChar == (char)13){button1_Click(null,null);}}
