public void SortGridView(GridView gv, List <WACParameter> parms)
        {
            string srt           = WACParameter.GetParameterValue(parms, WACParameter.ParameterType.ListSort) as string;
            string sortDirection = ToggleSortDirection(srt);

            sortExpression = srt;
            IList sorted = ListSource.GetSortedList(DataProvider.SortedList, sortExpression, sortDirection);

            BindGridView(gv, sorted);
        }