Popup V2 - Can't locate View Model

[vouksh]

I followed the upgrade/migration guide and can compile and run the app, but now when I try to open a popup, it throws exception

System.InvalidOperationException: Could not locate KinesiaU.ViewModels.Popups.EnvironmentPickerPopupViewModel
09:11:26:655	   at CommunityToolkit.Maui.Services.PopupService.GetPopupContent[EnvironmentPickerPopupViewModel](EnvironmentPickerPopupViewModel bindingContext) in /_/src/CommunityToolkit.Maui/Services/PopupService.shared.cs:line 204
09:11:26:655	   at CommunityToolkit.Maui.Services.PopupService.ShowPopupAsync[EnvironmentPickerPopupViewModel](Shell shell, IPopupOptions options, IDictionary`2 shellParameters, CancellationToken token) in /_/src/CommunityToolkit.Maui/Services/PopupService.shared.cs:line 92
09:11:26:655	   at KinesiaU.ViewModels.EulaPageViewModel.EulaTitlePressed() in D:\git\KinesiaU-Maui\KinesiaU\ViewModels\EulaPageViewModel.cs:line 63

I have the popup registered as so in the MauiProgram class:

And call it like this:

I'm at a loss because this worked before the Popup rewrite, and now it's not, and I'm stuck where I am because I need to access this popup to set the app environment for testing.

[bijington]

If that worked in a previous version then you will have been very lucky!

You want to be using the AddScopedPopup method rather than AddScoped as per our docs:

https://learn.microsoft.com/en-us/dotnet/communitytoolkit/maui/views/popup-service#registering-a-popup

[bijington]

Ok. There is a very subtle difference between IView and View in terms of spelling but ContentPage does not derive from View

[vouksh]

So I switched back to using the Popup class for my popups and it seems to be working now, and I can access Popup.Behaviors now, so I can continue with using the EventToCommand behaviors.

[bijington]

Thanks for the update. Just to confirm though you are able to register a ContentPage as a Popup? That sounds like a bug to me

[vouksh]

Correct, there were no errors until runtime when I tried to open a popup.

[bijington]

I have opened this PR #2715 to prevent this from being allowed