datatable加一条数据，然后排序

DataTable dt = clsModule.getBoard();
            DataRow userRow;
            userRow = dt.NewRow();
            userRow["ModuleId"] = "0";

            userRow["ModuleName"] = "首页";
            userRow["Parentid"] = "0";
            userRow["ModuleNo"] = "0";
            userRow["iorder"] = "0";
            dt.Rows.Add(userRow);
           
            if (dt != null)
            {
                dt.DefaultView.Sort = "iorder ASC";
                DataTable dtTemp = dt.DefaultView.ToTable();

                dlBoard.RepeatColumns = dt.Rows.Count;
                dlBoard.DataSource = dt;
                dlBoard.DataBind();
            }