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TreeListView: ArgumentOutOfRange expanding items via the data context #3572

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tenatus opened this issue May 23, 2024 · 1 comment · Fixed by #3574
Closed

TreeListView: ArgumentOutOfRange expanding items via the data context #3572

tenatus opened this issue May 23, 2024 · 1 comment · Fixed by #3574
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bug
Milestone
5.1.0

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@tenatus
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tenatus commented May 23, 2024

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: 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
@tenatus tenatus added bug evaluation required Items is pending review or evaluation by the team labels May 23, 2024
@Keboo Keboo removed the evaluation required Items is pending review or evaluation by the team label May 27, 2024
@Keboo Keboo added this to the 5.1.0 milestone May 27, 2024
@Keboo Keboo mentioned this issue May 27, 2024
Merged
Keboo added a commit to Keboo/MaterialDesignInXamlToolkit that referenced this issue May 27, 2024
@Keboo
Fixing out of range exception on tree view
c7b871a 
This occurs when IsExpanded is set on a virtualized container that has been removed.

Fixes MaterialDesignInXAML#3572
@Keboo
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Keboo commented May 27, 2024

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

Keboo added a commit that referenced this issue May 27, 2024
@Keboo
Fixing out of range exception on tree view (#3574)
3aa4967 
This occurs when IsExpanded is set on a virtualized container that has been removed.

Fixes #3572
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Fixing out of range exception on tree view Keboo/MaterialDesignInXamlToolkit
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@Keboo @tenatus