/// <summary>  
        /// 获取链接返回数据  
        /// </summary>  
        /// <param name="Url">链接</param>  
        /// <param name="type">请求类型</param>  
        /// <returns></returns>  
        public string GetUrltoHtml(string Url, string type)
        {
            try
            {
                System.Net.WebRequest wReq = System.Net.WebRequest.Create(Url);
                System.Net.WebResponse wResp = wReq.GetResponse();
                System.IO.Stream respStream = wResp.GetResponseStream();
                using (System.IO.StreamReader reader = new System.IO.StreamReader(respStream, Encoding.GetEncoding(type)))
                {
                    return reader.ReadToEnd();
                }
            }
            catch (System.Exception ex)
            {
                return ex.Message;
            }
        }

  //调用方法
 string j = GetUsersHelper.GetUrltoHtml(url, type);//获取微信服务器返回字符串