public DataTable hoadon_select() { return(hddav.hoadon_select()); }
public DataTable select_hoadon() { return(hddal.hoadon_select()); }
public DataTable hoadon_select() { return(hddav.hoadon_select()); }
public DataTable select_hoadon() { return(hddal.hoadon_select()); }