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MaterialDesignInXAML / MaterialDesignInXamlToolkit

Google's Material Design in XAML & WPF, for C# & VB.Net.
http://materialdesigninxaml.net
MIT License
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TreeListView: ArgumentOutOfRange expanding items via the data context #3572

Closed tenatus closed 1 month ago

tenatus commented 1 month ago

Bug explanation

The TreeListView is a great replacement for WPF's TreeView but I discovered that there can be a serious issue (application crash) when expanding nodes programmatically (using a bound view model property).

I added this functionality to the demo application as an example of the issue: https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/compare/master...tenatus:MaterialDesignInXamlToolkit:treelistbug

To reproduce:

  1. Run the demo app
  2. Select the Tree page
  3. Click the new 'expand all items' button for the multi-select tree view
  4. BUG: The application crashes (ArgumentOutOfRangeException)

Version

5.0

Keboo commented 1 month ago

Thank you for the easy repro example. Put in a fix for it. It will be in the next nightly release.