private void btnAdd_Click(object sender, EventArgs e)
        {
            //Form1 f = Parent as Form1;
            apartman     = new Apartman(tbAdresa.Text, (int)nudCena.Value);
            DialogResult = DialogResult.OK;
            //grad.cityName = tbIme.Text;
            //grad.postalCode = tbPostal.Text;
            //DialogResult = System.Windows.Forms.DialogResult.OK;

            /*if (tbAdresa != null && !tbAdresa.Equals("") && nudCena != null && !nudCena.Equals(""))
             * {
             *  apartman.Adresa = tbAdresa.Text;
             *  apartman.Cena = nudCena.Text;
             *  DialogResult = DialogResult.OK;
             * }
             * else
             * {
             *  DialogResult = DialogResult.Cancel;
             * } */
        }
 private void UpdateApartmani()
 {
     if (lbCity.SelectedIndex != -1)
     {
         lbApartmani.Items.Clear();
         tbNajevtin.Text = "";
         int      najvetin         = 1000000;
         Apartman najevtinApartman = null;
         Grad     g = (Grad)lbCity.SelectedItem;
         foreach (Apartman a in g.apartmani)
         {
             lbApartmani.Items.Add(a);
             if (a.Cena < najvetin)
             {
                 najvetin         = a.Cena;
                 najevtinApartman = a;
             }
         }
         if (najevtinApartman != null)
         {
             tbNajevtin.Text = najevtinApartman.ToString();
         }
     }
 }