NullPointerException on Application Exit

[grigiada]

I performed the porting of a huge UWP project with LiveChart in WinUI 3 with LiveCharts2.
I followed your examples and I created all charts in ViewModel. When I perform the Application Exit command I intercept an NullPointerException (from SkiaSharp library).
Is it my fault? How can I solve this problem?

[torum]

I have the same issue and wondering the same thing. I get the following exception when I exit my WinUI3 app while chart is loading.

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=SkiaSharp.Views.Windows
stack trace:
SkiaSharp.Views.Windows.SKXamlCanvas.Invalidate()

It's not a big deal since app would exit anyway but it would be nice to know how to avoid this.

[beto-rodriguez]

I have also seen this, it is strange that WinUI disposes the control, but the Invalidate method is still running.

This should be fixed with the referenced commit, now the control verifies if the canvas is still loaded in the UI.

This will be included in the next version of the library, thanks for the report!

[daltzctr]

Any chance you'd be able to publish a beta release with the fix?

[beto-rodriguez]

yes I am planning to release a new version to NuGet, I hope today or tomorrow is ready.