Response.Redirect 打开新窗口的两种方法

一般情况下，Response.Redirect 方法是在服务器端进行转向，因此，除非使用 Response.Write("<script>window.location='http://dotnet.aspx.cc';</script>") 方法外，是不能在新窗口打开所指定的  URL 地址的。但是，如果仔细分析一下，如果设置 form 元素的 target 属性，还是有办法打开新窗口的。下面就是可以采用的两种方法。

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 >