string _url = "http://192.168.0.135:888/sqjz/fxry/fxry/up";             string jsonParam = "{\"sqjzrybh\":\"A001\",\"sfzh\":\"130533196874589652\",\"xm\":\"王濤\"}";             var request = (HttpWebRequest)WebRequest.Create(_url);             request.Method = "POST";             request.ContentType = "application/json;charset=UTF-8";             var byteData = Encoding.UTF8.GetBytes(jsonParam);             var length = byteData.Length;             request.ContentLength = length;             var writer = request.GetRequestStream();             writer.Write(byteData, 0, length);             writer.Close();             var response = (HttpWebResponse)request.GetResponse();             var responseString = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8")).ReadToEnd();             MessageBox.Show(responseString.ToString());