How to Check if Request come from ajax in asp .net MVC

To Check if Request comes from ajax in Controller use the following :

public JsonResult GetEmployeeName( int id)
{
     if (Request.IsAjaxRequest())

      {
        

       }
}

or you can set [AjaxOnly] annotation to set action in controller works only for ajax
request.

[AjaxOnly]
public JsonResult GetEmployeeName( int id)
{
var result = Json(GetEmployeeByID(id), JsonRequestBehavior.AllowGet);

return result ;
}