Issue to get sort and filter fields

[pranit@srcomsec]

We are using Virtual Scroll to support a table with about 5000+ rows, to filter + sort, and display data. While doing so we were able to display the data via remote and call new data using virtual scroll.

Link: https://paramquery.com/demos/virtual_scroll

We are currently facing an issue in sending sorting and filtering requests from the table.

We are not being able to fetch the value we have filled in the filter header, or the sorting direction clicked by the user because of which we are not being able to pass the filter/sort instruction to the server.

I have attached the aspx and cs file with web method

Kindly guide us how this can be fixed.

Thanks!