public void GetMessagesByFilter(string para) { MessageFilter filter = null; try { Logs.Debug("GetMessagesByFilter Parameter:" + para); GetMessageControl(); filter = JsonConvert.DeserializeObject <MessageFilter>(para); a_messages = a_control.GetMessageTrackByFilter(filter); a_result = "E097BB93-B095-46C9-97FA-56D6DD61108C" + JsonConvert.SerializeObject(new { Messages = a_messages }); } catch (Exception ex) { Logs.Error("GetMessagesByFilter Exception:" + ex.ToString()); } }