public void GetAllRessult()
        {
            try
            {
                List <CourseSetup> CrsList = _courseManager.GetAllCourseList("");
                ViewBag.SmList = new SelectList(CrsList, "ID", "Code");

                List <RegisterStudents> RegList = _courseManager.GetAllRegList("");
                ViewBag.CorShLst = new SelectList(RegList, "ID", "RegNo");

                List <StudentResults> ResultList = _studentResultManager.GetAllResultGradet("");
                ViewBag.RsltLst = new SelectList(ResultList, "ID", "Grade");
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }