If you have enabled paging with IgnorePaging export property set to "true", the selected items will be cleared within the OnGridExported event, because the control will rebind in order to retrieve all items before the export. If the IgnorePaging is set to "false", you can set the Visible property of the non-selected items:
sender, GridCommandEventArgs e)
(e.CommandName == RadGrid.ExportToExcelCommandName)
For more information regarding the export functionality, please refer to our documentation:
Hope this helps.
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