public SanPhamDAO() { db = new WebBanHang(); }
public ThanhVienDAO() { db = new WebBanHang(); }
public NhaCungCapDAO() { db = new WebBanHang(); }
public KhachHangDAO() { db = new WebBanHang(); }
public NhanVienDAO() { db = new WebBanHang(); }
public ChiTietHoaDonDAO() { db = new WebBanHang(); }
public HoaDonDAO() { db = new WebBanHang(); }