Response.Redirect 技巧
方法一：在服务器端设置 target 属性，这个方法也非常适用于客户端不支持脚本的情况。代码如下：
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
form1.Target = "_blank";
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("http://dotnet.aspx.cc");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body id="b" runat="server">
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="打开新窗口或者新 Tab " />
</form>
</body>
</html>
办法二：采用客户端脚本的方法设置 target 属性。代码如下：
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
Button1.Attributes.Add("onclick", "this.form.target='_newName'");
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("http://dotnet.aspx.cc");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body id="b" runat="server">
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="打开新窗口或者新 Tab " />
</form>
</body>
</html>
上面两种方法中的 target 属性可以采用任何合法的名称，但要注意，如果相同名称的窗口已经打开，则新窗口会在已经存在名称的窗口里打开。
更新：如果需要设置弹出窗口的宽度和高度，可以修改为下面的方法：
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
string WindowName = "win" + System.DateTime.Now.Ticks.ToString();
Page.RegisterOnSubmitStatement("js", "window.open('','" + WindowName + "','width=600,height=200')");
form1.Target = WindowName;
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("http://dotnet.aspx.cc");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body id="b" runat="server">
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="打开新窗口或者新 Tab " />
</form>
</body>
</html>
另外一种弹出的方法可以参见老外的文章：
http://weblogs.asp.net/infinitiesloop/archive/2007/09/25/response-redirect-into-a-new-window-with-extension-methods.aspx
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> ");