datagridview中使用combox

private void Form1_Load(object sender, EventArgs e)

{

    sysdt2.Columns.Add("factory", System.Type.GetType("System.String"));

    sysdt2.Rows.Add("一厂");

    sysdt2.Rows.Add("二厂");

}

private void toolStripButton2_Click(object sender, EventArgs e) //新增

{

    DataGridViewComboBoxColumn x1 = new DataGridViewComboBoxColumn();

    x1.DataSource = sysdt2;

    x1.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox;

    x1.HeaderText = "厂别";

    x1.DisplayMember = "factory";

    x1.ValueMember = "factory";

    dataGridView1.Columns.Add(x1);

}