/// <summary>         /// 後臺傳送post請求         /// </summary>         /// <param name="url">請求地址</param>         /// <param name="param">傳送引數</param>         /// <returns></returns>         public static string PostHttp(string url, string param)         {             string strURL = url;             System.Net.HttpWebRequest request;             request = (HttpWebRequest)WebRequest.Create(strURL);             request.Method = "POST";             request.ContentType = "application/json;charset=UTF-8";             string paraUrlCoded = param;             byte[] payload;             payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);             request.ContentLength = payload.Length;             Stream writer = request.GetRequestStream();             writer.Write(payload, 0, payload.Length);             writer.Close();             System.Net.HttpWebResponse response;             request.Timeout = 5000;             response = (System.Net.HttpWebResponse)request.GetResponse();             //if (response.StatusCode == HttpStatusCode.OK)             //{

            //}             System.IO.Stream s;             s = response.GetResponseStream();             string StrDate = "";             string strValue = "";             StreamReader Reader = new StreamReader(s, Encoding.UTF8);             while ((StrDate = Reader.ReadLine()) != null)             {                 strValue += StrDate + "\r\n";             }             return strValue;         }