I'm familiar with using MEF in .NET Framework 4.6.* but not in .NET Core. I'm messing about with the Hamburger template from Template 10 to see if it is suitable for my needs but I haven't been able to figure out how to compose my view models using MEF.
My question is how can I navigate to a view using the navigation service in such a way that its view model will be injected by MEF?
My bad, I hadn't spotted this:
How do I use a Unity IoC container with Template10?
In the end, I went for a solution like this:
public interface IView
{
ViewModelBase ViewModel { get; }
}
[Export]
public sealed partial class MainPage : Page, IView
{
public ViewModelBase ViewModel
{
get
{
return VM as ViewModelBase;
}
}
[Import]
public MainPageViewModel VM { get; set; }
public MainPage()
{
InitializeComponent();
NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Enabled;
}
}
And in the App.xaml.cs:
public override async Task OnStartAsync(StartKind startKind, IActivatedEventArgs args)
{
var config = new ContainerConfiguration();
_container = config.WithAssembly(GetType().GetTypeInfo().Assembly).CreateContainer();
await NavigationService.NavigateAsync(typeof(Views.MainPage));
}
public override INavigable ResolveForPage(Page page, NavigationService navigationService)
{
_container.SatisfyImports(page);
return (page as IView)?.ViewModel;
}