InteractionRequest.Raised is null after viewmodel change about prism

[brianlagunas]

Can you provide a link to a sample that reproduces this issue?

[briannoyes]

Not sure if this is from the same person, have been having discussion about this here: http://compositewpf.codeplex.com/discussions/627396#post1418779

And just asked them to post as an issue here this morning.

[Haukinger]

Not the same person, but probably the same issue.
I'll post a sample, but not before the weekend I'm afraid.

EDIT: this was way easier to reproduce than I thought :-)
use this project and put it in the prism v5 solution (and add unity via nuget):
https://www.dropbox.com/s/kphigdw9psfj5jk/InteractionRequestIssue.zip?dl=0

to see the issue, navigate to first view and trigger the popup -> works fine
then navigate to second view, and back to first view
try to trigger the popup -> won't work anymore

[Haukinger]

Any news on this one? Does the sample work for you?

[briannoyes]

Thanks for the repro, I can run and see the problem there. This issue is in our backlog and will try to get a fix in with our next release.

[brianlagunas]

I am looking into this. For now, you can get around this issue by using the RegionMemberLifetime attribute on the view.

[RegionMemberLifetime(KeepAlive = false)]
public partial class FirstView : INavigationAware

This will fix the issue by creating a new instance of the view each time you navigate to it.

[brianlagunas]

Alright this had been fixed. I would also like to point out that we have decided to make the InteractionRequestTrigger Obsolete since it really isn't needed. You can use the built-in EventTrigger like this:

[tkthatikonda]

Hello Brian,

We have a similar issue but the resolution [RegionMemberLifetime(KeepAlive = false)] is not helping here.

We have a view that opens a UserControl (UC1) as a popup using InteractionRequest.

        UC1ViewRequest.Raise(new UC1ViewModel
        {
            Title = "User Control 1"

        });

UC1 has a button that opens another UserControl (UC2) as a popup using InteractionRequest.

        UC2ViewRequest.Raise(new UC2ViewModel
        {
            Title = "User Control 2"

        });

Opening UC2 again and again from UC1 works fine as long as UC1 is not closed.

But after closing UC1, UC2 cannot be shown/opened from UC1 but UC1 can be opened again from the main view.

The Raised event on the UC2ViewRequest is null.

Please advise. I can send you a sample to reproduce.

[brianlagunas]

This issue has been fixed and was closed. If you need the fix right away, you can use the latest source code.

[tkthatikonda]

Hello Brian,

Could we know the fix for Prism 5? We can rebuild the source code with the fix. Or is the fix only available in latest version Prism 6?

Thanks

[brianlagunas]

The fix is only available for Prims 6. If you are using Prism 5, just use the built in EventTrigger and set the EventName="Raised"

[tkthatikonda]

Thanks Brian for your prompt response. That worked!!

[lock]

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.