private void btluu_Click(object sender, EventArgs e) { DonHangPublic dhpublic = new DonHangPublic(); dhpublic.MADH = tbmadh.Text.Trim(); dhpublic.NGAYBAN = DateTime.Parse(datengayban.Text.Trim()); dhpublic.KHACHHANG = combokh.SelectedValue.ToString(); dhpublic.NHANVIEN = textBoxMaNV.Text.Trim(); try { if (dhbus.themDonHang(dhpublic)) MessageBox.Show("Thêm đơn hàng thành công", "Thong bao", MessageBoxButtons.OK, MessageBoxIcon.Error); else MessageBox.Show("Them don hang that bai", "Thong bao", MessageBoxButtons.OK, MessageBoxIcon.Error); } catch (Exception ex) { MessageBox.Show(ex.ToString()); } finally { DS_đơn_hàng = dhbus.getDonHang(); DGDonHang.DataSource = DS_đơn_hàng; } }