Prism: Support for IDestructilbe in WPF projects

[weitzhandler]

Package info

• Platform: WPF
• Prism version: 6.3

Repro steps

Looks like the interface IDestructible is only available in XF.

I'm looking for a way to unsubscribe from events of objects injected to the VM before the VM needs to get collected/disposed of in WPF.

Is there a different way to achieve this?

*Some event sources aren't IoC ruled and EventAggregator is not always a feasible solution.

[noufionline]

Subscribe has an overload which has a predicate to control the subscription. Check IsActive on the predicate then it will not fire when view is not active.

Subscribe(action, ThreadOption.PublisherThread, false, payload=> IsActive);

[weitzhandler]

Would still be nice to have IDestructible in WPF too, to give us a hint on VM tear-down.

[brianlagunas]

You can write a custom region behavior to accomplish this in your app. This will most likely not be included in Prism as I cannot assume that when a view is removed from a region that it will not be reused again.

[brianlagunas]

I've actually decided to include this. If someone is trying to reuse VM's after they have been removed from a Region, then it is the developers responsibility not to "clean them up" or even implement this interface.

[brianlagunas]

Done!

[lock[bot]]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.