public ActionResult SaveStudentResult()
{
var studentList = _studentRegisterManager.GetAllStudents();
ViewBag.Students = new SelectList(studentList, "StudentId", "RegNumber");
var gradeList = _studentResultManager.GetGradeList();
ViewBag.Grades = new SelectList(gradeList, "GradeId", "GradeName");
return(View());
}