public string GetGioLenXe(string maDiemDi, string maDiemDen, int maChuyen, int maTramLen) { using (QLXeKhachEntities context = new QLXeKhachEntities()) { return(context.sp_GetGioLenXe(maDiemDi, maDiemDen, maChuyen, maTramLen).FirstOrDefault()); } }