public object Convert(object value, Type targetType, object parameter, string language) { if (value.ToString() == string.Empty) { return(value); } else { User user = new User(); UserDbRepository userDbRepository = new UserDbRepository(Singletons.Singleton_ConnectionValue.Instance.SQLiteConnection); user = userDbRepository.GetUserInDatabase((string)value); if (user == null) { return("B.Danych ; Numer NIP: " + value.ToString() + " "); } else { return(user.NameCompany); } } }