private void saveButton_Click(object sender, RoutedEventArgs e)
 {
     string r;
     if (roleBox.Text == "Administrator") r = "admin";
     else r = "user";
     try
     {
         using (pisModelDataContext cont = new pisModelDataContext())
         {
             korisnici art = new korisnici
             {
                 korisnicko_ime = userName.Text,
                 lozinka = Password.Text,
                 ovlast = r
             };
             cont.korisnicis.InsertOnSubmit(art);
             cont.SubmitChanges();
         }
         updateListBox();
     }
     catch (Exception ex)
     {
         MessageBox.Show("Dogodila se pogreška!!!\n" + ex.Message.ToString());
     }
 }
 partial void Deletekorisnici(korisnici instance);
 partial void Updatekorisnici(korisnici instance);
 partial void Insertkorisnici(korisnici instance);