private void OnSaveClick(Object sender, RoutedEventArgs e) { if (ViewModel.Meal.MealId >= 0) { // edit meal Meal.EditMealInDatabase(ViewModel.Meal); } else { // add new meal Meal.AddMealToDataBase(ViewModel.Meal); } MainWindow.MainWindowAccessor.ChangeContentWindow(new ManageMealsView()); }