private void btn_yeucaunhaphang_Click(object sender, EventArgs e) { DonNhapHang dnh = new DonNhapHang() { LyDo = txt_lydo.Text, NguoiLap = this.NhanVien.ID, NCC = ((NhaCungCap)comb_ncc.SelectedItem).ID, NgayLap = DateTime.Now }; DonNhapHang kq = DonNhapHang_BUL.Them(dnh); if (kq != null) { bool rs1 = ChiTietDonNhapHang_BUL.themList(kq.ID, this.ListChiTietDNH); if (rs1) { MessageSucess(); } else { MesageFaild(); } } else { MesageFaild(); } }