public ActionResult Students(string StudentId, string courseid, string Marksfor, string Marks, string batch)
        {
            MarksManagersrb aMarksManagersrb = new MarksManagersrb();

            ViewBag.Message = aMarksManagersrb.InsertMarks(StudentId, courseid, Marksfor, Marks);

            ViewBag.batch    = batch;
            ViewBag.marksfor = Marksfor;
            CourseManagersrb aCourseManagersrb = new CourseManagersrb();
            int batch2    = Convert.ToInt32(batch);
            int courseid2 = Convert.ToInt32(courseid);

            ViewBag.students = aCourseManagersrb.GetStudents(batch2, courseid2);

            return(View());
        }