private void addButton_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                string temp = izdatnicaBox.SelectedItem.ToString();
                string[] words = temp.Split('(');
                int id;
                using (pisModelDataContext cont = new pisModelDataContext())
                {
                    zahtjevnica art = new zahtjevnica
                    {
                        datum = Convert.ToDateTime(datumPicker.Text),
                        id_izdatnice = Convert.ToInt32(words[0])
                    };
                    cont.zahtjevnicas.InsertOnSubmit(art);
                    cont.SubmitChanges();
                    var entry = (from ee in cont.zahtjevnicas
                                 select ee).OrderByDescending(ee => ee.id).FirstOrDefault();
                    id = entry.id;
                    iznos.tempZahtjevnicaID = id;
                }
                updateListBox();

                //MessageBox.Show(id.ToString());
                stavkeZahtjevnicePage stavke = new stavkeZahtjevnicePage();
                stavke.idBoxx.Text = id.ToString();
                //MessageBox.Show(iznos.tempID.ToString());
                stavke.ShowDialog();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Dogodila se pogreška!!!\n" + ex.Message.ToString());
            }
        }
 partial void Updatezahtjevnica(zahtjevnica instance);
		private void detach_zahtjevnicas(zahtjevnica entity)
		{
			this.SendPropertyChanging();
			entity.izdatnica = null;
		}
 partial void Insertzahtjevnica(zahtjevnica instance);
 partial void Deletezahtjevnica(zahtjevnica instance);