public ActionResult DeleteSubject(int? id)
{
if (!id.HasValue)
{
return RedirectToAction("ManageSubjects", "Admin");
}
Subject subject = unitOfWork.SubjectRepository.GetById(id.Value);
if (subject == null)
{
return RedirectToAction("ManageSubjects", "Admin");
}
SubjectsDeleteVM model = new SubjectsDeleteVM();
model.Id = subject.Id;
model.Name = subject.Name;
return View(model);
}
public ActionResult DeleteSubject(SubjectsDeleteVM model)
{
if (ModelState.IsValid)
{
Subject subject = unitOfWork.SubjectRepository.GetById(model.Id, true);
List<CoursesSubjects> css = unitOfWork.CoursesSubjectsRepository.GetBySubjectId(subject.Id, true);
if (css.Count > 0)
{
model.Name = subject.Name;
TempData.FlashMessage("Subject cannot be deleted! It is assigned to one or more courses!", null, FlashMessageTypeEnum.Red);
return View(model);
}
unitOfWork.GradeRepository.DeleteRange(subject.Grades.ToList());
subject.Grades.Clear();
unitOfWork.SubjectRepository.Delete(subject.Id);
unitOfWork.Save();
TempData.FlashMessage("Subject has been deleted");
return RedirectToAction("ManageSubjects", "Admin");
}
return View(model);
}