C#封装WebBrowser时NewWindow事件无法获取Url的解决方法

一，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”。 

二，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：

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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 sink         protected override void CreateSink()         {             //MAKE SURE TO CALL THE BASE or the normal events won't fire             base.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 navigating         public event EventHandler BeforeNavigate;         public event EventHandler BeforeNewWindow;         protected void OnBeforeNewWindow(string url, out bool cancel)         {             EventHandler 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 h = BeforeNavigate;             WebBrowserExtendedNavigatingEventArgs args = new WebBrowserExtendedNavigatingEventArgs(url, frame);             if (null != h)             {                 h(this, args);             }             //Pass the cancellation chosen back out to the events             cancel = args.Cancel;         }         //This class will capture events from the WebBrowser         class WebBrowserExtendedEvents : System.Runtime.InteropServices.StandardOleMarshalObject, DWebBrowserEvents2         {             ExtendedWebBrowser _Browser;             public WebBrowserExtendedEvents(ExtendedWebBrowser browser) { _Browser = browser; }             //Implement whichever events you wish             public 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.Runtime.InteropServices.ComImport(), System.Runtime.InteropServices.Guid("34A715A0-6587-11D0-924A-0020AFC7AC4D"),         System.Runtime.InteropServices.InterfaceTypeAttribute(System.Runtime.InteropServices.ComInterfaceType.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 : System.ComponentModel.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;         }     } }

　　三，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。
 四、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，有的放矢:

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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; }

　　五，在ExtendedWebBrowser的事件里双击“BeforeNewWindow”并添加代码：

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private void extendedWebBrowser2_BeforeNewWindow(object sender, EventArgs e) {            WebBrowserExtendedNavigatingEventArgs eventArgs = e as WebBrowserExtendedNavigatingEventArgs;       eventArgs.Cancel = true;     ((ExtendedWebBrowser)sender).Navigate(eventArgs.Url); }