private void saveButton_Click(object sender, RoutedEventArgs e)
        {
            string temp = jedMjCombo.SelectedItem.ToString();
            string[] words = temp.Split('(');
            using (pisModelDataContext cont = new pisModelDataContext())
            {
                artikli art = new artikli
                {
                    naziv = nazivBox.Text,
                    jedinicna_cijena = Convert.ToInt32(jedCijena.Text),
                    vrsta = vrstaBox.Text,
                    id_jedinice_mjere = Convert.ToInt32(words[0])
                };
                cont.artiklis.InsertOnSubmit(art);
                cont.SubmitChanges();
            }
            updateListBox();

        }
 partial void Deleteartikli(artikli instance);
 partial void Insertartikli(artikli instance);
 partial void Updateartikli(artikli instance);
		private void detach_artiklis(artikli entity)
		{
			this.SendPropertyChanging();
			entity.jedinica_mjere = null;
		}