private void XemChiTietHoaDon(int idHoaDon) { var h = _hoaDonBLL.LayHoaDonTheoID(idHoaDon); dt_ThoiGian.DateTime = (DateTime)h.Ngay_Lap; txt_Ban.Text = tenBan; txt_KhuVuc.Text = _banBLL.LayKhuVucTheoIDBan(idBan); txt_SoHoaDon.Text = idHoaDon.ToString(); LoadDaTaChiTietHoaDon(idHoaDon); }