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
