.net后台通过xmlhttp 和远程服务通讯

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;
using System.Net;
namespace WebService1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        //public static string result="";
        //public delegate int xmlhandle(myxmlhttp a,out string result);
        //public static event xmlhandle xmleventa;

        protected void Page_Load(object sender, EventArgs e)
        {
            MSXML2.XMLHTTPClass http = new MSXML2.XMLHTTPClass();
            try
            {
                http.open("post", "http://localhost:2227/Default.aspx", false, "name", "psw");
            }
            catch
            {
                Response.Write("远程服务连接不上");
            }
            http.send("ssssssss");

            if (http.readyState == 4)
            {
                if (http.status == 200)
                {
                    Response.Write(http.responseText);
                }
                else if (http.status == 401)
                {
                    Response.Write("身份验证失败");
                }
                else
                {
                    Response.Write("远程发生其他错误");
                }
            }
            else
            {
                Response.Write("未能完整接受数据");
            }
        }
    }
}

脚本可以通过onreadystatechange这个委托来调用方法。

.net 中不行．因为onreadystatechange是只写的。当然可以继承xmlhttp，来覆写他的只写方法．加上一个事件．但是要实现所有接口．写起来麻烦。

不知道上面的代码是否会有稳定性不好的地方。