In the following online example: Blazor DataGrid Component - IQueryable Virtualization | Free UI Components by Radzen edit the code and add the following 2 parameters to the grid:
AllowGrouping="true" AllGroupsExpanded="false"
Recompile and then group by 'Order Id'.
Then expand any random group.
Then scroll up or down but go all the way to the top (or bottom) and you will see all the groups auto expand.
Is there something I can do to suppress this behaviour?
I'm afraid that this is not supported and we are not aware of any way on how to provide support for collapsed groups with virtualization.
Thank you @enchev
Is this true even when paging is OFF and all the groups render?
In my case, I have AllowPaging=false (same as in the example). The behaviour I see is that the grid shows everything collapses. I can expand, collapse without any issues any of the groups. It is just that suddenly all groups expand as soon as I scroll and hit the top of the scroll area.
Virtualization is the same as paging however instead the pager you have a vertical scrollbar.