Method ToString() cannot be translated to SQL query. So you have several options:
You can get full entity userdata from db and map it to string array in .net code:
var userdata = db.Users.OrderBy(sidx + " " + sord).Skip(pageIndex * pageSize).Take(pageSize).AsEnumerable(); var jsonData = new { total = totalPages, page, records = totalRecords, rows = ( from u in userdata select new { i = u.Id, cell = new string[]{**u.Id.ToString()**, u.Name,u.Designation,u.City} //cell = new string[] { "", "", "", "" } }).ToArray() };
2.You can use two Select()
, first to get data from db, second to map it to your string array:
var userdata = db.Users.OrderBy(sidx + " " + sord).Skip(pageIndex * pageSize).Take(pageSize).Select(u=>new{u.Id, u.Name, u.Designation, u.City});
var jsonData = new
{
total = totalPages,
page,
records = totalRecords,
rows = (
from u in userdata.AsEnumerable()
select new
{
i = u.Id,
cell = new string[]{u.Id.ToString(), u.Name,u.Designation,u.City}
}).ToArray()
};