public IActionResult OnPostGetCourseScheduleList(int year, int day, int lesson, CourseScheduleType courseScheduleType)
        {
            ResultList <SCourseSchedule> result = new ResultList <SCourseSchedule>();

            try
            {
                result.List = _CourseSrv.GetCourseSchedule_ForSelection(year, day, lesson);
            }
            catch (Exception ex)
            {
                result.ErrorMsg = ex.Message;
            }
            return(new JsonResult(result));
        }