public async Task <IActionResult> Index()
{
Student student = await _db.Users
.Include(s => s.Disciplines)
.SingleOrDefaultAsync(s => s.UserName == User.Identity.Name);
List <Discipline> disciplines = await _db.Disciplines.ToListAsync();
List <DisciplineViewModel> selectedDisciplines = new List <DisciplineViewModel>();
foreach (Discipline d in disciplines)
{
DisciplineViewModel selectedDiscipline = new DisciplineViewModel
{
Discipline = d,
IsSelected = student.Disciplines.Contains(d)
};
selectedDisciplines.Add(selectedDiscipline);
}
StudentToDisciplinesViewModel studentToDisciplines = new StudentToDisciplinesViewModel
{
Student = student,
Disciplines = selectedDisciplines
};
return(View(studentToDisciplines));
}
public IActionResult SelectDisciplines(StudentToDisciplinesViewModel studentDisciplines)
{
Student student = _db.Users
.Include(s => s.Disciplines)
.SingleOrDefault(s => s.Id == studentDisciplines.Student.Id);
List <Discipline> newDisciplines = new List <Discipline>();
foreach (var discipline in studentDisciplines.Disciplines)
{
if (discipline.IsSelected)
{
Discipline disc = student.Disciplines.Where(d => d.Id == discipline.Discipline.Id).SingleOrDefault <Discipline>();
if (disc == null)
{
newDisciplines.Add(disc);
}
}
}
int numOfRecSelDiscs = studentDisciplines.Disciplines.Where(d => d.IsSelected).ToList().Count;
int numOfStudDisc = student.Disciplines.Count;
if (numOfRecSelDiscs != numOfStudDisc || newDisciplines.Count > 0)
{
student.Disciplines.Clear();
foreach (DisciplineViewModel discipline in studentDisciplines.Disciplines)
{
if (discipline.IsSelected)
{
Discipline newDiscipline = _db.Disciplines.SingleOrDefault(d => d.Id == discipline.Discipline.Id);
student.Disciplines.Add(newDiscipline);
}
}
_db.SaveChanges();
return(View("UpdateSuccess"));
}
return(RedirectToAction(nameof(Index)));
}
