[BUG] .NET MAUI Hot Reload Not Working

[Wyndal]

Describe the Issue

In some areas of our App, Hot Reload doesn't work at all.

Steps To Reproduce

Example of Hot Reload not working:

1. In any environment (provided one is QA), login in to an account
2. Open the HomePageView.xaml
3. Search for "{localize:Localize AssignmentsLabel}" - line 719 at the time I'm writing this
4. Modify the text property of that label

You can try this with other labels on the same page. Trying searching "Community" and modifying that as well.

Note: I had to drastically reduce the resolution of this video in order to upload it to GitHub. The higher resolution video should be available internally.

hot-reload-homepageview-420p.mov

Expected Behavior

I expect the "Assignment" or "Community" header in the UI to change via Hot Reload.

Environment Information

OS: Mac OS Sequoia 15.0.1
.NET SDK: 8.0.402
.NET Runtime: 8.0.11

VS Code Extensions:
.NET MAUI: 1.6.14
C#: 2.59.14
C# Dev Kit: 1.15.2
.NET Install Tool: 2.2.3

[emilytobler]

Attempted to reproduce - could not get hot reload working with iphone 16 on 18.2. However could get Android working in the same spot with a Pixel 6 API 34.

[BretJohnson]

I see the errors below reported on the HomePageView.xaml page, with local:BasePageView.Resources and <ContentPage.Resources> both definining Resources for HomePageView.xaml. That seems to be related to the issue - what the XAML parser encounters errors like this, it won't apply Hot Reload changes. When I remove the top Resources section, the changes are applied.

That said, in this case the two Resources definitions both look valid here & our MAUI Hot Reload XAML parser should likely be updated to accommodate this case. I'm also not sure why this isn't an issue for Android, just for iOS.

[BretJohnson]

@etvorun - Let's discuss this tomorrow. I can show you the XAML in question, as we have the app source.

[BretJohnson]

Updating HomePageView.xaml to just set Resources once rather than twice should fix this issue. @Wyndal - can you try that and confirm.

[Wyndal]

Per your suggestion, I moved the BasePageView resources into the ContentPage resources section, and this fixed the problem. Thanks!