private void saveButton_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                int id;
                using (pisModelDataContext cont = new pisModelDataContext())
                {
                    otpremnica art = new otpremnica
                    {
                        datum = Convert.ToDateTime(datumPicker.Text),
                        vrijeme = vrijemeBox.Text
                    };
                    cont.otpremnicas.InsertOnSubmit(art);
                    cont.SubmitChanges();
                    var entry = (from ee in cont.otpremnicas
                                 select ee).OrderByDescending(ee => ee.broj_narudzbe).FirstOrDefault();
                    id = entry.broj_narudzbe;
                    iznos.tempOtpremnicaID = id;
                }
                updateListBox();

                //MessageBox.Show(id.ToString());
                stavkeOtpremnicePage stavke = new stavkeOtpremnicePage();
                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 Deleteotpremnica(otpremnica instance);
 partial void Updateotpremnica(otpremnica instance);
 partial void Insertotpremnica(otpremnica instance);