public static void deletep_thue(P_Thueobject ph)
        {
            P_Thuemodel a = new P_Thuemodel();

            a.deleteP_thue(ph);
        }
        public static void addp_thue(P_Thueobject ph)
        {
            P_Thuemodel a = new P_Thuemodel();

            a.addP_thue(ph);
        }
        public static DataTable timp_thuebyngaylap(DateTime ngaylap)
        {
            P_Thuemodel ph = new P_Thuemodel();

            return(ph.timp_thuebyngaylap(ngaylap));
        }
        public static DataTable timp_thuebymakh(string makh)
        {
            P_Thuemodel ph = new P_Thuemodel();

            return(ph.timp_thuebymakh(makh));
        }
        public static DataTable timp_thuebymaphieu(string maphieu)
        {
            P_Thuemodel ph = new P_Thuemodel();

            return(ph.timp_thuebymaphieu(maphieu));
        }
        public static DataTable getdatap_thue()
        {
            P_Thuemodel ph = new P_Thuemodel();

            return(ph.getdataP_thue());
        }