public JsonResult RecordAttendance(int studentId, int timeTableId)
 {
     try
     {
         var isPresent = _attendanceManager.IsStudentPresent(studentId, timeTableId);
         if (isPresent)
         {
             return(Json(new { result = "AlreadyPresent" }, JsonRequestBehavior.AllowGet));
         }
         _attendanceManager.RecordAttendance(studentId, timeTableId);
         return(Json(new { result = "success" }, JsonRequestBehavior.AllowGet));
     }
     catch (Exception e)
     {
         return(Json(new { result = e.Message }, JsonRequestBehavior.AllowGet));
     }
 }