Hi Mikhail,
Thank you for using Syncfusion products.
We have checked your requirement “To freeze rows or columns in ASP.NET MVC Spreadsheet” and currently this support is not available in Spreadsheet. However, we have already added it to our feature request list and this support will be included in Essential Studio 2017 Volume 1 release which will be available at the mid of February, 2017.
Regards,
Silambarasan