DataList批量更新!

bool result = false;
        //循环datalist里的所有项
        foreach (DataListItem item in dlstCatList.Items)
        {
            int catId = Convert.ToInt32(dlstCatList.DataKeys[item.ItemIndex]);
            TextBox txtList = (TextBox)item.FindControl("txtList");
            string str = txtList.Text.Trim();
            string strSql = "update CMS_Cat set DisplayLevel="+str+" where CatId="+catId;
            result = apc.ExeSQL(strSql);
        }
        if (result == true)
        {
            Response.Write("<script language=javascript>alert('更新成功!')</script>");
        }
        else
        {
            Response.Write("<script language=javascript>alert('更新失败!')</script>");
        }