Hi Vadim,
Sorry for the delay in responding.
You can filtered the rows by using the following code snippet:
[C#]
IWorksheet sheet = workbook.Worksheets[0];
//Creating an AutoFilter in the first worksheet. Specifying the Autofilter range.
sheet.AutoFilters.FilterRange = sheet.Range["B4:E19"];
Please refer the sample in the below link which illustrates the above:
http://websamples.syncfusion.com//samples/XlsIO.Windows/73132/main.htmPlease try this and let me know if this helps.
Regards,
G.Yavana