private void button_Click(object sender, RoutedEventArgs e) { if (tb_drzava.Text == "" || tb_luka.Text == "" || tb_naziv.Text == "") { textBlock.Text = "Morate unijeti sve podatke.\n POkušajte ponovo..."; textBlock.Foreground = Brushes.Red; return; } Brod b = new Brod(); b.Luka = tb_luka.Text; b.Naziv = tb_naziv.Text; b.Drzava = tb_drzava.Text; lista.Add(b); this.DialogResult = true; this.Close(); }