public static string getCountUserAnswer(string q_type, string t_id, string q_id, string a_id) { string uan = null; wcf.parti.Service1 _parti = new wcf.parti.Service1(); partiDB.RootObject rootObject = new partiDB.RootObject(); try { string json_str = _parti.GetCountUserAnswer(q_type, t_id, q_id, a_id); if (json_str == "e0")//code error { MessageBox.swalModal(_Page, "error", "e0:ລະບົບຂັດຂ້ອງຕິດຕໍ່ຜູ້ເບີ່ງແຍ່ງດ່ວນ.", ""); } else if (json_str == "e1")//no data found { MessageBox.swalModal(_Page, "info", "e1:ບໍ່ມີຂໍ້ມູນທີ່ຈະສະແດງ.", ""); } else if (json_str == "e2")//can't connect database { MessageBox.swalModal(_Page, "warning", "e2:ບໍ່ສາມາດເຊື່ອມຕໍ່ຖານຂໍ້ມູນໄດ້.", ""); } else { uan = json_str; } } catch (Exception ex) { MessageBox.swalModal(_Page, "error", "e0:" + ex.Message, ""); } return(uan); }