public ObservableCollection<Artikal> NadjiAkumulatorRoban(int? proizvodjacID, int? amperaza) { try { LavDataClassesDataContext _baza = new LavDataClassesDataContext(konekcioniString); if (_baza.DatabaseExists()) { ObservableCollection<Artikal> _artikli = new ObservableCollection<Artikal>(_baza.uspNadjiAkumulator(proizvodjacID, amperaza).ToList()); return _artikli; } else { throw new Exception("Baza ne postoji."); } } catch (Exception ex) { throw ex; } }