//sua khach hang private void btnSua_Click(object sender, EventArgs e) { try { DTO_KhachHang sv = new DTO_KhachHang(txtMaKH.Text, txtTenKH.Text, txtDiaChi.Text, txtDienThoai.Text, txtEmail.Text, txtGhiChu.Text); BUS_KhachHang.Sua_khachhang(sv); DialogResult dr = MessageBox.Show("Sua thanh Cong", "Thông Báo", MessageBoxButtons.OK); loaddata(); if (dr == DialogResult.OK) { loaddata(); } } catch (Exception ex) { MessageBox.Show("Sua không thành công!\n" + ex.Message); } }