这里介绍Ihttpmodule处理请求管道的方法。Response.Redirect的原理是服务器设置返回http状态码为302,然后客户端执行跳转，用reflector可以看到.net的代码段。
以下是HttpResponse类的Redirect方法中的跳转代码
this.StatusCode = 0x12e; this.RedirectLocation = url;所以，我们可以扩展Ihttpmodule来拦截http状态码，强制设为200，同时插入js代码段来实现新窗口打开。以下是Ihttpmodule的实现代码
using System;using System.Collections.Generic;using System.Text;using System.Web;namespace ClassLibrary2
{
public class Class1:System.Web.IHttpModule
{
public void Init(HttpApplication application) { application.PreSendRequestHeaders += new EventHandler(application_PreSendRequestHeaders);
} void application_PreSendRequestHeaders(object sender, EventArgs e) { HttpApplication Application = (HttpApplication)sender; HttpContext context = Application.Context; if (context.Response.StatusCode == 302) { context.Response.Write("<script>window.open('"+context.Response.RedirectLocation+"')</script>"); context.Response.StatusCode = 200; } } public void Dispose() { } }
}最后配置一下web.config就可以了
<?xml version="1.0"?><configuration> <system.web> <compilation debug="true"/> <authentication mode="Windows"/> <httpModules> <add name="MyModule" type="ClassLibrary2.Class1,ClassLibrary2"></add> </httpModules> </system.web></configuration>另外一点，ms自坐主张的在跳转之后，end之前插入了这么一段代码，我得b4他们一下，解决办法，大家自己想想吧。
this.Write("<html><head><title>Object moved</title></head><body> "); this.Write("<h2>Object moved to <a href="" + HttpUtility.HtmlAttributeEncode(url) + "">here</a>.</h2> "); this.Write("</body></html> ");