Default3.aspx.cs

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using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default3 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string url = "http://passport.ccmall.cn/api/userapi/isloginbyjsonp?";
        System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
        System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
        System.IO.Stream responseStream = response.GetResponseStream();
        System.IO.StreamReader sr = new System.IO.StreamReader(responseStream, System.Text.Encoding.GetEncoding("utf-8"));
        string responseText = sr.ReadToEnd();
        sr.Close();
        sr.Dispose();
        responseStream.Close();
        string jsonData = responseText;

        Label1.Text = jsonData.Substring(9, 4);
        if (Label1.Text == "2000")
            Response.Redirect("http://passport.ccmall.cn/auth/login?pid=10");
    }
}