I am having real performance issues with a "AllowCellMerge" grid which I have replicated in the attached example.
It looks like a bug as the the TableView with AllowCellMerge is not respecting the BeginDataUpdate/EndDataUpdate wrappers?
The AllowCellMerge property produces date update performance issues
Answers approved by DevExpress Support
created 8 years ago
(modified 8 years ago)
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
- v17.2.3Download Official Update
- v17.1.5Download Official Update
Attaching Video Showing slowness
Attaching Profiler screenshots showing CellMerge Method calls
Exact same sample with no cell merge has no noticable lag
Hello,
I've reproduced this issue and forwarded it to our R&D team for further research. Follow our notifications to be informed about our progress.
Thanks,
Kirill
Hello,
We've found the cause of the issue and fixed it. However, the fix will be available starting with version 17.1. I see that you're using version 15.1.8. To resolve the issue in this version, you need to create the following TableView class descendant:
public class MyTableView : TableView { protected override void UpdateCellMergingPanels() { if(Grid.DataController.IsUpdateLocked) return; base.UpdateCellMergingPanels(); } public void UpdatePanels() { UpdateCellMergingPanels(); } }After that, it will be necessary to manually update GridControl's merging using the UpdatePanels method after the EndDataUpdate method invocation.
Thanks,
Kirill
Thanks for the Hotfix above!
You are welcome!