To get the selected record data, use getSelectedRecords method of ejGrid. The getSelectedRecords method will return the selected record details from the Grid.
So, if you need to get the selected record details after grouping and filtering, use getSelectedRecords method of ejGrid. If you need to get the selected rows, use getSelectedRows method of ejGrid.
Refer the below help documents for getSelectedRecords and getSelectedRows
https://help.syncfusion.com/api/js/ejgrid#methods:getselectedrecords
https://help.syncfusion.com/api/js/ejgrid#methods:getselectedrows
Regards,
Prasanna Kumar N.S.V