// GET: Students/Details/id
public async Task <IActionResult> Details(int?id)
{
if (id == null)
{
return(BadRequest());
}
var student = await _studentRepository
.GetStudentById(id.Value);
if (student == null)
{
return(NotFound());
}
var studentVm = StudentViewModel.CreateStudentVm(student);
return(View(studentVm));
}