Hi Jinchuan,
Greetings from
Syncfusion support.
By default, the Excel filter in the EJ2 Grid is designed to mimic
the behavior of the Excel filter in Microsoft Excel, and in Microsoft Excel the
search text is not persisted in the search box.. This is the default behavior,
hence it is not feasible to persist the search text in the search box of the
excel filter.
Regards,
Joseph I.