private void DisplaySubitems()
    {
        if (levelNumOfThis >= maxLevelNum)
        {
            return;
        }

        SubitemArea.Visible = true;

        OpListQueryParams param = new OpListQueryParams()
        {
            ParentId    = c.qsId,
            CultureName = c.seCultureNameOfBackend,
            Kw          = ""
        };

        param.PagedParams = new PagedListQueryParams()
        {
            BeginNum   = 1,
            EndNum     = 999999999,
            SortField  = c.qsSortField,
            IsSortDesc = c.qsIsSortDesc
        };

        List <OperationForBackend> subitems = empAuth.GetOperationList(param);

        if (subitems != null)
        {
            totalSubitems          = subitems.Count;
            rptSubitems.DataSource = subitems;
            rptSubitems.DataBind();
        }
    }