Hi Dennis,
Thanks for your interest in Syncfusion products.
In GridGroupingControl, QueryCellInfo, QueryColCount and QueryRowCount events will not work as in GridControl, since the internal architecture is completely different. Virtual mode for the GridGroupingControl is different from GridControl.
You can refer the following forum thread that discus more detail about GridGroupingControl Virtual mode.
Virtual mode in GridGroupingControl :
http://www.syncfusion.com/support/Forums/message.aspx?&MessageID=54150Using GridGroupControl in Virtual Mode :
http://www.syncfusion.com/support/forums/message.aspx?MessageID=52657GroupingGrid event handlers are not being invoked :
http://www.syncfusion.com/support/forums/message.aspx?MessageID=29684You can also refer to our shipped browser sample ‘EngineOptimizations’ which demonstrates the technique to load data’s in virtual mode.
Please let me know if you have any questions.
Regards,
Asem.