引用DetailsView的一个单元格

  protected void DetailsView1_DataBound(object sender, EventArgs e)
    {
        if (DetailsView1.CurrentMode == DetailsViewMode.Insert)
        {
            TextBox stateTextBox = (TextBox)DetailsView1.Rows[6].Cells[1].Controls[0];
            stateTextBox.Text = DropDownList1.SelectedValue;
            stateTextBox.Enabled = false;
        }
    }