private void btAdd_Click(object sender, RoutedEventArgs e)
        {
            AddEditDeleteDlg dlg = new AddEditDeleteDlg(null);

            if (dlg.ShowDialog() == true)
            {
                lvPassengers.ItemsSource = Globals.db.GetAllPassengers();
            }
        }
        private void lvPassengers_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            Passenger p = (Passenger)lvPassengers.SelectedItem;

            if (p == null)
            {
                return;
            }
            AddEditDeleteDlg dlg = new AddEditDeleteDlg(p);

            if (dlg.ShowDialog() == true)
            {
                lvPassengers.ItemsSource = Globals.db.GetAllPassengers();
            }
        }