WinUI feature: Navigation with dependency injection

[gabor-budai]

Is your feature request related to a problem? Please describe.

No response

Describe the solution you'd like

The generated ConfigureServices() in App.xaml.cs can be misleading, since it registers pages as services. When NavigationService.NavigateTo() is called, a type is passed to _frame.Navigate() instead of an instance. As I have seen WinUI’s API does not support passing instance to the Frame.Navigate() method. (it also makes parametrized constructors prohibited)

I found a solution to enable Frame.Navigate() to instantiate a page via an IServiceProvider interface. When Frame.Navigate() is called, it retrieves an IXamlType from the App, IXamlType.ActivateInstance() method is responsible for creating the instance from a type. The ActivateInstance() method can be redirected, and I created a sample app that shows how this redirection is implemented.
I think it would be great that the App.DI.cs could be included in the TemplateStudio’s source generator.

Describe alternatives you've considered

No response

Additional context

Here is my example app.

Applies to the following platforms:

• WinUI
• WPF
• UWP