{
   "button":[
    {
      "type":"view",
      "name":"付停车费",
      "url":"http://www.baidu.com"
  
    },{
      "name":"个人中心",
      "sub_button":[
      {  
        "type":"view",
        "name":"个人信息",
        "url":"http://www.baidu.com"
      },
      {
        "type":"view",
        "name":"订单查询",
        "url":"http://www.baidu.com"
      },
      {
        "type":"view",
        "name":"使用帮助",
        "url":"http://www.baidu.com"
      },
      {
        "type":"view",
        "name":"下载APP",
        "url":"http://www.baidu.com"
      }]
    }]
 }

    public string GetPage(string posturl, string postData)
    {
      Stream outstream = null;
      Stream instream = null;
      StreamReader sr = null;
      HttpWebResponse response = null;
      HttpWebRequest request = null;
      Encoding encoding = Encoding.UTF8;
      byte[] data = encoding.GetBytes(postData);
      // 准备请求...
      try
      {
        // 设置参数
        request = WebRequest.Create(posturl) as HttpWebRequest;
        CookieContainer cookieContainer = new CookieContainer();
        request.CookieContainer = cookieContainer;
        request.AllowAutoRedirect = true;
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = data.Length;
        outstream = request.GetRequestStream();
        outstream.Write(data, 0, data.Length);
        outstream.Close();
        //发送请求并获取相应回应数据
        response = request.GetResponse() as HttpWebResponse;
        //直到request.GetResponse()程序才开始向目标网页发送Post请求
        instream = response.GetResponseStream();
        sr = new StreamReader(instream, encoding);
        //返回结果网页（html）代码
        string content = sr.ReadToEnd();
        string err = string.Empty;
        Response.Write(content);
        return content;
      }
      catch (Exception ex)
      {
        string err = ex.Message;
        return string.Empty;
      }
    }