AJAX弹出窗口，永远不会被拦截的弹出窗口（create pop up window without popup blocked）

We use window.open will be block by the browsers or blocker tools, and showModalDialog will not be block by the browsers, but always blocked by blocker tools, the only way to open pop up window which cannot be blocked is to use AJAX to transfer the pop up page from server-side to client-side, because we are not doing a HTTP-POST, so the page will not be blocked.

You can try the following code (refer to http://www.evget.com/zh-CN/article/2422/default.aspx)

I am not sure it can not be blocked by every blocker, but I have tested many of them, it really works.

<!-- Default.aspx -->
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<script language ="javascript">
function getAjaxXml()
{
        var xml = new ActiveXObject("Microsoft.XMLHTTP");

        var str="flag=888";
xml.open("GET","showXML.aspx?"+str,false);
xml.send();
return xml.responseText;
}
function imgclick()
{
var value=getAjaxXml();
window.open ("http://www.asp.net/?xml="+value );
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="Button1" type="button" value="button" onclick="imgclick();"/>
</div>
</form>
</body>
</html>
<!-- showXML.aspx -->
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="showXML.aspx.cs" Inherits="showXML" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>

//showXML.aspx.cs
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class showXML : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Write("xml" + Request["flag"]);
}
}

Edit:

the blod line with yellow back ground cause the program is not supported by Firefox

That is because Firefox is not support Microsoft.XMLHTTP, you can use the following code to create xml variable:
var xml;

{ 

 xml =new ActiveXObject("Msxml2.XMLHTTP") 

} catch(e) { 

try 

{ 

 xml=new ActiveXObject("Microsoft.XMLHTTP"); 

} catch(oc) { 

 xml=null; 

} 


Thanks.

作者：Lance Zhang（Lance Zhang's Tech Blog）
出处：http://blodfox777.cnblogs.com/
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