How to implement IActivationForViewFetcher for child UserControl?

Question

I just added ReactiveUI to the existing code base. Of course, for the first control I tried this, I hit. I use it with a UserControl built into TabControl. The code looks something like this:

public partial class TabPageControl : UserControl, IViewFor<TestViewModel>
{
    public TabPageControl()
    {
        InitializeComponent();

        ViewModel = new TestViewModel();

        this.WhenActivated(dispose =>
        {
            dispose(this.Bind( ... ));
            dispose(this.BindCommand( ... ));
        });
    }
}

When the application starts, the following error message appears:

Don't know how to determine when TabPageControl is activated / deactivated, you may need to implement IActivationForViewFetcher

So how can I implement IActivationForViewFetcher? I'm not sure what I should do with GetAffinityForView. I assume in GetActivationForViewI need to check if UserControl is currently visible inside TabControl?

Answer 1

, IActivationForViewFetcher ( , , VisualTree) - , ( ).

( ReactiveUI) ReactiveUI.Winforms.Registrations - ActivationForViewFetcher.

, #, VB.NET. , .

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