public HttpResponseMessage GetComboboxData(string sessionKey, string cond = "", string order = "") { try { string columns = ""; cond = SelReceiveproductDFR.GetComboboxData(sessionKey, out columns, cond, out order); return(Request.CreateResponse <string>(HttpStatusCode.OK, JsonConvert.SerializeObject(dta.GetComboboxData(columns, cond, order)))); } catch (Exception e) { ExceptionHandler.Log(e); return(null); } }