public static CHITIETHOADON_DTO ThemChiTietHoaDon(BANG_CHITIETHOADON bcthd)
        {
            QuanLyShop = new QUANLYCUAHANGEntities();
            bcthd      = QuanLyShop.BANG_CHITIETHOADON.Add(bcthd);
            QuanLyShop.SaveChanges();
            CHITIETHOADON_DTO cthdDTO = ConvertDTO(bcthd);

            return(cthdDTO);
        }
        public static CHITIETHOADON_DTO ConvertDTO(BANG_CHITIETHOADON cthd)
        {
            CHITIETHOADON_DTO cthdDTO = new CHITIETHOADON_DTO();

            cthdDTO.idhoadon  = cthd.idhoadon;
            cthdDTO.idsanpham = cthd.idsanpham;
            cthdDTO.dongia    = cthd.dongia;

            return(cthdDTO);
        }