public static DataTable LayDSCTHD(string SoHD)
        {
            DataTable dt = BillDetailsDAL.LayDSCTHD(SoHD);

            return(dt);
        }
        public static DataTable LayDSCTHDTuMaHD(string maHD)
        {
            DataTable _ds = BillDetailsDAL.LayDSCTHDTuMaHD(maHD);

            return(_ds);
        }
        public static bool XoaCTHDTheoSoHD(string soHD)
        {
            bool kq = BillDetailsDAL.XoaCTHDTheoSoHD(soHD);

            return(kq);
        }
        public static bool XoaCTHDTheoSoHDVaMaTD(string soHD, string MaTB)
        {
            bool kq = BillDetailsDAL.XoaCTHDTheoSoHDVaMaTB(soHD, MaTB);

            return(kq);
        }
        //huy
        public static bool ThemChiTietHoaDon(BillDetails cthd)
        {
            bool kq = BillDetailsDAL.ThemChiTietHoaDon(cthd);

            return(kq);
        }