datagridview 限制某列只能输入数字

public DataGridViewTextBoxEditingControl CellEdit = null;

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)

{

    if (this.dataGridView1.CurrentCellAddress.X == 4)

    {

        CellEdit = (DataGridViewTextBoxEditingControl)e.Control;

        CellEdit.SelectAll();

        CellEdit.KeyPress += Cells_KeyPress; //绑定事件

    }

}

private void Cells_KeyPress(object sender, KeyPressEventArgs e) //自定义事件

{

    if ((this.dataGridView1.CurrentCellAddress.X == 4) || (this.dataGridView1.CurrentCellAddress.X == 5) || (this.dataGridView1.CurrentCellAddress.X == 6))

    {

        if (!(e.KeyChar >= '0' && e.KeyChar <= '9')) e.Handled = true;

        if (e.KeyChar == '\b') e.Handled = false;

    }

}

 

我写的有一个可以获取那个自动生成的序列号：
private void dgvGoodsexpend_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
DataGridViewTextBoxColumn dgv_Text = new DataGridViewTextBoxColumn();
for (int i = 0; i < dgvGoodsexpend.Rows.Count; i++)
{
int j = i + 1;
this.dgvGoodsexpend.Rows[i].HeaderCell.Value = j.ToString();
}
}

获取值：（我在一个button事件中）
private void button2_Click(object sender, EventArgs e)
{
string txt = "";
for (int i = 0; i < dgvGoodsexpend.Rows.Count; i++)
{
txt += dgvGoodsexpend.Rows[i].HeaderCell.Value.ToString()+" / ";
}
MessageBox.Show(txt);
}