public void deleteSach() { //SACH sach = repository.getSach(view.selectedSach); string masach = view.selectedSach; if (masach != "") { SACH sach = repository.getSach(masach); //view.Log(sach.MASACH); if (valid(sach)) { SACH kq = repository.deleteSach(masach); //view.Log("Đã lưu thành công"); getListSach(); } } }