Hi RodrigoE,
Thanks for your interest in Syncfusion products.
If you are using the GridDataBoundGrid, it uses a DataView object associated with a DataTable to implement filtering. So, the default filter support only works with a DataTable/DataView datasource. If you want filtering supported for an arbitrary IList object, you can use a GridGroupingControl. You can refer the below forum threads for more details:
Here are the forum thread links:
http://www.syncfusion.com/support/Forums/message.aspx?MessageID=25336http://www.syncfusion.com/support/Forums/message.aspx?MessageID=43703Please let me know if it helps.
Regards,
Subhasheela R