private void btnThem_Click_1(object sender, EventArgs e) { panel3.Visible = true; panel1.Width = 810; panel1.Height = 659; DocGia dg = new DocGia(); themhaysua = "them"; txtDiaChi.Enabled = true; txtEmail.Enabled = true; txtNgaySinh.Enabled = true; txtNgayTao.Text = DateTime.Now.ToString(); txtSDT.Enabled = true; cbbLoaiDG.Enabled = true; cbbMaDocGia.Text = (int.Parse(dg.taoMaTuDong()) + 1).ToString(); cbbTenDocGia.Enabled = true; txtDiaChi.Text = ""; txtEmail.Text = ""; txtNgaySinh.Text = ""; txtSDT.Text = ""; cbbLoaiDG.Text = ""; cbbTenDocGia.Text = ""; cbbTenDocGia.Focus(); }