var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://www.1weilian.com:8750/mtInterface/realTime/getRealTime");

httpWebRequest.ContentType = "application/json";

httpWebRequest.Method = "POST";

using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))

{

    string json = "{\"clientId\":\"66675e88c7c64bea91f649e04xxxxxx\"," +

"\"rows\":\"2\","+

                  "\"page\":\"0\"}";

    streamWriter.Write(json);

    streamWriter.Flush();

    streamWriter.Close();

}

var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))

{

    var result = streamReader.ReadToEnd();

}