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详解C#重写WebBrowser组件,禁止跳转到IE新窗口(禁止新窗口,使用本窗口打开)、脚本错误

作者:郑州网站建设 2013/6/11 13:28:42 点击: 来源:

 

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.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<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 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;   
        }   
    }   
}

    (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.hi.baidu.com/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);   
           }    
       }

 

这下,可以睡觉去了。别忘记保存你的成果喔,byebye... 

 

 

转自:http://www.360doc.com/content/11/0228/23/6015727_97024145.shtml

 

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