dotnet/winforms

Setting `ListView.CheckBoxes` after `ListView.StateImageList` destroys imagelist

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#3 531 ouverte le 1 juil. 2020

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:beetle: bug:construction: work in progressarea-controls-ListViewhelp wanted

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Description

  • Have you experienced this same bug with .NET Framework?: Yes

Problem description:

An outcome of investigations in https://github.com/dotnet/winforms/issues/3358, in the following scenarios CheckBoxes is toggled whilst a user-supplied imagelist is bound to StateImageList property - the native listview control will tarnish the user-supplied one.

The issue is reproducible in net4x and netcore3.1.

listview-cb-off

listview-cb-on

Additionally, it appears changes in one instance of listview may affect another, if state imagelist were similar (e.g. contain the same set of images), as the native layer may be caching.

Expected behavior:

Changes CheckBoxes property does no affect a user-supplied imagelist.

Minimal repro:

https://github.com/RussKie/ListViewCheckboxesStateImageList

Also the issue is easily reproducible in .NET Framework designer by setting up the StateImageList property on a ListView control, (save), and then setting CheckBoxes=true.

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