public ActionResult TimeSheetCalendar(string tc)
{
var dateBegin = DateUtils.FirstMonthDay(DateTime.Today);
var dateEnd = DateUtils.LastMonthDay(dateBegin.AddMonths(1));
var lectures = LectureService.GetLmsLectures(dateBegin, dateEnd, tc.ToUpper());
var data = lectures.Select(x => new CalData(x.LectureDateBeg, x.LectureDateEnd,
x.ClassRoom_TC, x.Course_TC)).ToList();
var result = EntityUtils.GetCalendar(data);
return(Content(result, "text/calendar"));
}