Server side search and sorting. Best practice

I use the following method to get data for my jggrid subgrid and its operation is completely normal.

Note that this method is used to implement server-side sorting and swapping.

Now I have a request, as you can see in the line

List<SomeEntity> myList = _service.GetSomeData(id); a database call is made here and all records are retrieved.

So I was just not very sure, so I just wanted to know if there is best practice in this practice for implementing server paging and

public JsonResult GetData(string folderId, string sidx, string sord, int page, int rows) {
    int id = int.Parse(folderId);
    List < SomeEntity > myList = _service.GetSomeData(id);

    const int pageSize = 5;

    // total
    double totalPages = Math.Ceiling((double) myList.Count() / pageSize);

    // sort
    if (sord == "asc") {
        myList = myList.OrderBy(m = > m.Name).ToList();
    }
    else {
        myList = myList.OrderByDescending(m = > m.Name).ToList();
    }

    // paging
    myList = myList.Skip((page - 1) * pageSize).Take(pageSize).ToList();

    var jsonData = new {
        total = totalPages, records = domainList.Count, page,

        rows = myList
    };

    return Json(jsonData, JsonRequestBehavior.AllowGet);
}​