net jquery jsonp跨域请求

资料：http://www.dotblogs.com.tw/topcat/archive/2011/09/21/37024.aspx

1.在A网站构建ashx

可以看到请求时这样子的 www.xxx.com/xx.ashx?callback=?

输出：?({"UserName":"0010001BKCVXGJV","PassWord":"KHFTGUBY"})

public class GetAccountIDHandler : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";
        string callback = context.Request.QueryString["callback"];
        if (!string.IsNullOrEmpty(callback))
        {
            AccountUser user = new AccountUser();
            user.UserName =“admin“;
            user.PassWord = “admin“;;
            string jsonString = Newtonsoft.Json.JsonConvert.SerializeObject(user);
            context.Response.Write(callback+"(" + jsonString + ")");  
        }
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
    public class AccountUser
    {
        public string UserName { get; set; }

        public string PassWord { get; set; }

    }
    
}

2.网站B：请求端

<%@ 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></title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
    <script language="javascript" type="text/javascript">
        $(document).ready(function() {
            $('#btn1').click(btn1_click);
        });
        function btn1_click() {
            $.getJSON('http://localhost:32330/WebSite/portal/GetAccountIDHandler.ashx?callback=?', jsonp_callback);
        }
        function jsonp_callback(data) {
            alert(data.UserName);
            alert(data.PassWord);
        }

    </script>

</head>
<body>
    <form id="form1" runat="server">
    <div>
        <input id="btn1" type="button" value="取得" />
    </div>
    </form>
</body>
</html>