GridView编辑状态下DropDownList的联动

protected void ddlDw_SelectedIndexChanged(object sender, EventArgs e)
        {
            DropDownList ddlDw = sender as DropDownList;
            GridViewRow gvRow = ddlDw.NamingContainer as GridViewRow;
            CheckBoxList chklXdzz = gvRow.FindControl("chklXdzz") as CheckBoxList;

            string dwbh = gvUser.DataKeys[gvRow.RowIndex].Values[1].ToString();
            string curDwbh = ddlDw.SelectedValue;
            if (dwbh != curDwbh)
            {
                BindXdzz(chklXdzz, curDwbh);
            }
            else
            {
                string xdzzbh = gvUser.DataKeys[gvRow.RowIndex].Values[2].ToString();
                BindXdzz(chklXdzz, curDwbh, xdzzbh);
            }
        }

这里使用NamingContainer获取上一级数据容器，再通过该容器获取兄弟控件。

注意别忘记将ddlDw的AutoPostback属性设置为True。