Get the list of registered view for navigation with Prism

user_14993351 0
Viewed 221

I am working on a modular application with Prism DryIoc on WPF

In my modules I have views registered for navigation like this

public void RegisterTypes(IContainerRegistry containerRegistry)
{
     containerRegistry.RegisterForNavigation<Manual1View>();
     containerRegistry.RegisterForNavigation<Manual2View>();
     containerRegistry.RegisterForNavigation<ProductionView>();       
}

Is there a way to find the list of currently registered views for navigation directly from Prism or the Container ?

dryioc prism wpf
2 Answers

Is there a way to find the list of currently registered views for navigation directly from Prism or the Container ?

Not using the IContainerRegistry interface but using the DryIoc implementation:

if (containerRegistry is DryIocContainerExtension dryIoc)
{
    IContainer container = dryIoc.Instance;
    Type[] types = container.GetServiceRegistrations()?
        .Where(x => !string.IsNullOrEmpty(x.OptionalServiceKey?.ToString()))
        .Select(x => x.ImplementationType)
        .ToArray();
}
user_72521820

You should roll out your own registry for those views you want the user to be able to select from. That one could also do the registration for navigation, so you don't have to duplicate the registration code.

internal class MachineModeRegistry : IMachineModeRegistry
{
    public MachineModeRegistry(IContainerRegistry containerRegistry)
    {
        _containerRegistry = containerRegistry;
    }

    #region IMachineModeRegistry
    public void RegisterView<T>()
    {
        _containerRegistry.RegisterViewForNavigation<T>(nameof(T));
        _listOfViews.Add( nameof(T) );
    }

    public IReadOnlyCollection<string> RegisteredViews => _listOfViews;
    #endregion

    #region private
    private readonly List<string> _listOfViews = new List<string>();
    private readonly IContainerRegistry _containerRegistry;
    #endregion
}

and in the app or bootstrapper's RegisterTypes

_containerRegistry.RegisterInstance<IMachineModeRegistry>(new MachineModeRegistry(_containerRegistry);

and in the modules'

 _containerRegistry.Resolve<IMachineRegistry>().RegisterView<Manual1View>();

Note: Resolve in RegisterTypes is evil and error-prone, but can't be avoided here.

Note: you can't inject IContainerRegistry, therefore we use RegisterInstance (registering the container registry instead would have been very evil)

user_57584200
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