public List<wygl_charge_ChargeAccountingMaster> GetChargeDataItemsPage(string precinctId, int chargeYear, int chargeMonth, PageInfo info)
        {
            int pageindex = (info.CurrenetPageIndex < 1) ? 1 : info.CurrenetPageIndex;
            int pageSize = (info.PageSize <= 0) ? 20 : info.PageSize;

            int excludedRows = (pageindex - 1) * pageSize;

            var q = from a in context.wygl_charge_ChargeAccountingMaster
                    where a.PrecinctID.Equals(precinctId) && a.ChargeYear == chargeYear && a.ChargeMonth == chargeMonth
                    orderby a.PrecinctID, a.BuildingID, a.FloorID, a.RoomID descending
                    select a; 

            info.RecordCount = q.Count();

            //IQueryable<wygl_charge_ChargeAccountingMaster> query = q.Skip<wygl_charge_ChargeAccountingMaster>(excludedRows).Take<wygl_charge_ChargeAccountingMaster>(pageSize);

            var result = q.ToList<wygl_charge_ChargeAccountingMaster>();

            return result;
        }