public ActionResult List(int selectedClassId, int selectedSubjectId)
        {
            var students = this.data.Students.All()
                           .Where(s => s.StudentClass.StudentClassID == selectedClassId).ToList();
            List <EvaluateStudentViewModel> result = new List <EvaluateStudentViewModel>();

            foreach (Student student in students)
            {
                EvaluateStudentViewModel studentVM = EvaluateStudentViewModel.FromStudentModelWithMarks(student, selectedSubjectId);
                studentVM.SubjectID = selectedSubjectId;
                result.Add(studentVM);
            }
            return(PartialView(result));
        }
        public ActionResult Details(int selectedSubjectId, int?studentId)
        {
            if (studentId == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            Student foundStudent = this.data.Students.Find(studentId);

            if (foundStudent == null)
            {
                return(HttpNotFound());
            }
            EvaluateStudentViewModel evaluateStudentViewModel = EvaluateStudentViewModel
                                                                .FromStudentModelWithMarks(foundStudent, selectedSubjectId);

            return(View(evaluateStudentViewModel));
        }