C1FlexGrid regression in .700: "EndUpdate" might expand collapsed nodes

C1FlexGrid regression in .700: "EndUpdate" might expand collapsed nodes

Posted by: wknauf on 29 December 2025, 7:03 am EST

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  wknauf

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  Posted 29 December 2025, 7:03 am EST - Updated 29 December 2025, 7:08 am EST

  See attached sample: FlexgridExpandBug.zip

  It builds a tree by grouping, then it expands all checked nodes and collapses the other ones.
  
  This is the expected behavior (click button “Collapse without update”):
  
  

  

  802×246 6.58 KB

  If you call “EndUpdate” after setting the expanded/collapsed state, all nodes will be expanded afterwards (this happens when clicking the button “Collapse with update”):
  
  

  

  802×482 9.42 KB

  It worked with .693 and broke in .700 (see commented package reference in csproj file).

  A fix would be nice, as using the workaround to call “EndUpdate” before collapsing nodes might cause flickering for us.

  Best regards

  Wolfgang

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  aastha.gupta

  

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  Posted 30 December 2025, 3:46 am EST

  Hi Wolfgang,

  Thanks for sharing the sample along with the exact steps to replicate the issue.

  This does not seem to be the desired behavior. Therefore, we have escalated this issue to our developers. [Internal Tracking ID: C1WIN-34857]

  We will update you on this as soon as we hear back from them.

  Thanks & regards,
  
  Aastha