public async Task <ActionResult> GetThongTinGoiPhi(string TenTrungTam, string TenChuongTrinh, int?ID_GOIPHI) { try { var model = await Task.Run(() => db.APAX_DANGKYHOC_DM_GOIPHI(TenTrungTam, TenChuongTrinh).Where(t => t.ID_GOIPHI == ID_GOIPHI).FirstOrDefault()); return(Json(model, JsonRequestBehavior.AllowGet)); } catch { return(null); } }