private void btnUpdate_Click(object sender, RoutedEventArgs e) { int seats = 0; try { seats = Convert.ToInt32(txtSeats.Text); } catch (Exception) { ContentControlSuccess.Content = new DisplayError("Sæder skal være et tal!"); } if (seats > 0) { bool success = _fService.UpdateAirplane(_airplane.airplaneID, Convert.ToInt32(txtSeats.Text)); if (success) { ContentControlSuccess.Content = new DisplaySuccess("Fly er opdateret!"); ((MainWindow)Application.Current.MainWindow).TabAirplane.LoadGridData(); } } }