private void listGiangVien_MouseClick(object sender, MouseEventArgs e) { try { if (listGiangVien.SelectedIndex >= 0) { giangVienUpdateDTO = GiangVienBUS.TimTheoMaGiangVien(Int32.Parse(listGiangVien.SelectedValue.ToString())); txtTenGiangVienUpdate.Text = giangVienUpdateDTO.TenGiangVien; txtSoDienThoaiUpdate.Text = giangVienUpdateDTO.SoDienThoai; txtDiaChiUpdate.Text = giangVienUpdateDTO.DiaChi; txtEmailUpdate.Text = giangVienUpdateDTO.Email; } } catch (System.Exception ex) { MessageBox.Show(ex.Message); } }