Gridview中二级联动

 protected void drpZuoyedian_SelectedIndexChanged(object sender, EventArgs e)
 {
        DropDownList drpZuoyedian = (DropDownList)sender;
        GridViewRow gvData = (GridViewRow)drpZuoyedian.NamingContainer;

        string zuoyedian = drpZuoyedian.SelectedValue;
        DropDownList drpXianbie = (DropDownList)gvData.FindControl("drpXianbie");
        string sqlxianbie = "select * from pubXianbie where parent_id='" + zuoyedian + "'";
        Util.BindDropDownList(drpXianbie, sqlxianbie, "name", "id");
 }