private void Uloha6Vyhladaj_Click(object sender, RoutedEventArgs e) { try { var NazovKat = InputUloha6katNazov.Text; var idList = int.Parse(InputUloha6ListCis.Text); Uloha6List.ItemsSource = AfrikaKataster.Uloha6(NazovKat, idList); } catch (Exception) { MessageBox.Show("Zle zadane parametre", "ERR"); } }