public IActionResult List(int?id)
{
if (id == null)
{
return(NotFound());
}
ListGradeViewModel listGradeViewModel = new ListGradeViewModel
{
Student = _classroomService.GetStudentById(id.Value),
Grades = _classroomService.ListGradesByStudentId(id.Value),
Courses = _classroomService.ListFreeCoursesByStudent(id.Value)
};
if (listGradeViewModel.Student == null)
{
return(NotFound());
}
return(View(listGradeViewModel));
}
