public JsonResult GetClassScheduleByDeptId(int departmentId)
{
List <ViewClassSchedule> aList = aClassRoomManager.GetClassScheduleByDeptId(departmentId);
var aScheduleList = aList.Where(m => m.DepartmentId == departmentId).ToList();
return(Json(aScheduleList, JsonRequestBehavior.AllowGet));
}