TreeView SelectedItems is always zero if SelectionMode is SingleItem

[jverral]

If I have a TreeView, if it's set to SingleItem for it's selection mode, than it's SelectedItems is always zero, even when I clearly have something selected.

[limefrogyank]

Yes, and you can't even manually add nodes to the SelectedItems collection. It is always empty. (You seem to be able to manually add them when SelectionMode = Multiple )

[jevansaks]

Thanks for the report! Our team is on holiday break right now but we'll investigate when we return.

[jevansaks]

@kaiguo can you take a look at this when you're done with 19H1 bugs?

[kaiguo]

@jevansaks I saw there's a related issue #197. Should we just add a SelectedNode property to be consistent with ListView?

[jevansaks]

Yeah, that was my thinking. Now technically the other issue was asking for a SelectedItem not SelectedNode. Should we also be offering a SelectedItem and SelectedItems properties to help with the databinding scenarios?

[kaiguo]

Yeah, I'll add SelectedItem and SelectedItems too.

[predavid-zz]

We'd need SelectedItem as well as SelectedNode. @kaiguo - I believe you are in the process of adding both.

[kaiguo]

Yep, here’s the PR I just opened #243

[predavid-zz]

Great Progress! Thanks @kaiguo

[msft-github-bot]

🎉This issue was addressed in #243, which has now been successfully released as Microsoft.UI.Xaml v2.2.190731001-prerelease.:tada:

Handy links:

• Release Notes
• Official Nuget Release

[GrandArth]

May i ask how can i apply the new version to a uwp project? It seems this problem still exist in UWP (6.2.12)

[StephenLPeters]

Download and import our Nuget package into your project! We have instructions here: https://github.com/microsoft/microsoft-ui-xaml#using-winui