public ObservableCollection<Artikal> NadjiRobuRoban(Int16? proizvodjacID, string sifra, string naziv) { try { LavDataClassesDataContext _baza = new LavDataClassesDataContext(konekcioniString); if (_baza.DatabaseExists()) { ObservableCollection<Artikal> _artikli = new ObservableCollection<Artikal>(_baza.uspNadjiRobu(proizvodjacID, sifra, naziv).ToList()); return _artikli; } else { throw new Exception("Baza ne postoji."); } } catch (Exception ex) { throw ex; } }