进行webBrower开发的时候，肯定都会遇到一个问题。
那就是怎么样强制在本窗口打开新窗口的问题。
网上最常见的解决方法就是，
在NewWindow事件中取得要打开的网址，取消打开新窗口，然后在本窗口打开要转向的网址
p rivate void webBrowser_1_NewWindow(object sender, CancelEventArgs e)
{               
WebBrowser webBrowser_temp = (WebBrowser)sender;   
string newUrl = webBrowser_temp.Document.ActiveElement.GetAttribute("href");
webBrowser_1.Url = new Uri(newUrl);
e.Cancel = true;  
}

虽然这种方法能够解决大部分的要求，但是治标不治本。
而且当网址里面还有汉字的时候就更加麻烦了，比如在百度MP3，歌曲名字都是汉字，和百度空间里面，大部分用户名都是汉字，所以取的网址都用乱码。虽然，可以对网址进行编码，但是并不是所有网页都是uft-8编码，对于如何得知网页的编码又是一个课题了。

最根本的方法就是重写了。
新建一个类
using System;
using System.Collections.Generic;
using System.Text;

namespace webTestRecorder
{

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
    {
        p rivate string _Url;
        public string Url
        {
            get { return _Url; }
        }

p rivate string _Frame;
        public string Frame
        {
            get { return _Frame; }
        }

public WebBrowserExtendedNavigatingEventArgs(string url, string frame)
            : base()
        {
            _Url = url;
            _Frame = frame;
        }
    }
}

然后把webBrowser换成我们重写的ExtendedWebBrowser，添加事件处理
ieBrowser = new ExtendedWebBrowser();
ieBrowser.BeforeNewWindow += new EventHandler<WebBrowserExtendedNavigatingEventArgs>(ieBrowser_BeforeNewWindow);

然后在其BeforeNewWindow事件中：

void ieBrowser_BeforeNewWindow(object sender, WebBrowserExtendedNavigatingEventArgs e) {
     e.Cancel=true;
     ((ExtendedWebBrowser)sender).Navigate(e.Url);
}

---------------------另一方案下下----------------------

要解决这个问题，可以使用下面的方法：

在日常的开发中，大家有时需要用WebBrowser加载URL，来实现某些功能。而这时，我们就不希望所打开的页面中的链接，在新窗口中打开，因为这样的话，实际上是用系统默认的浏览器打开了，从而脱离了你的WebBrowser，也就不能被你所控制了。

假设WebBrowser的Name是 webBrowser1

******* void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)

{    //将所有的链接的目标，指向本窗体

foreach (HtmlElement archor in this.webBrowser1.Document.Links)

{

archor.SetAttribute("target", "_self");

}    //将所有的FORM的提交目标，指向本窗体    foreach (HtmlElement form in this.webBrowser1.Document.Forms){        form.SetAttribute("target", "_self");    }}

******* void webBrowser1_NewWindow(object sender, CancelEventArgs e){     e.Cancel = true;}

记得将 WebBrowser 的 AllowWebBrowserDrop 设为 false

将 WebBrowser 的 WebBrowserShortcutsEnabled 设为 false

将 WebBrowser 的 IsWebBrowserContextMenuEnabled 设为 false