// GET: Enrollment/Create
public ActionResult Create()
{
var viewModel = new EnrollmentViewModel();
// Teacher can enroll to his course only
if (User.IsInRole("Teacher"))
{
string currentUserId = User.Identity.GetUserId();
var courses = db.Courses.Where(c => c.Teacher.User.Id == currentUserId).ToList();
viewModel.Courses = courses;
}
// Student can enroll to courses he has not joined
if (User.IsInRole("Student"))
{
string currentUserId = User.Identity.GetUserId();
Student student = db.Students.FirstOrDefault(s => s.UserId == currentUserId);
if (student == null) // Check student is existed or not
{
return HttpNotFound();
}
// Select Passed course from Enrollment table
var enrollments = db.Enrollments.Where(e => e.StudentId == student.Id).ToList();
var courses = db.Courses.ToList();
if (enrollments == null)
{
return View(courses);
}
foreach (Enrollment enrollment in enrollments)
{
Course course = db.Courses.FirstOrDefault(c => c.Id == enrollment.CourseId);
if (course == null)
{
return HttpNotFound();
}
courses.Remove(course);
}
viewModel.Courses = courses;
viewModel.UserName = User.Identity.GetUserName();
}
if (User.IsInRole("Admin"))
{
var courses = db.Courses.Include(c => c.Semester).ToList();
viewModel.Courses = courses;
}
//viewModel.Courses = db.Courses.ToList();
ViewData["Error"] = null;
ViewData["Success"] = null;
return View(viewModel);
}
public ActionResult Create([Bind(Include = "UserName,SelectedCourses")] EnrollmentViewModel enrollModel)
{
if (ModelState.IsValid)
{
System.Diagnostics.Debug.WriteLine(enrollModel.UserName);
ApplicationUser user = db.Users.FirstOrDefault(u => u.UserName == enrollModel.UserName);
if (user != null) //check user is existed or not
{
Student student = db.Students.FirstOrDefault(s => s.UserId == user.Id);
if (student != null) //check student is existed or not
{
EnrollmentViewModel enrollment = new EnrollmentViewModel();
enrollment.SelectedCourses = enrollModel.SelectedCourses;
foreach (var item in enrollModel.SelectedCourses)
{
//check Enrollment is exited or not
Enrollment enroll = db.Enrollments.FirstOrDefault(e => e.StudentId == student.Id && e.CourseId == item);
if (enroll == null)
{
enroll = new Enrollment { StudentId = student.Id, CourseId = item };
db.Enrollments.Add(enroll);
db.SaveChanges();
}
else {
ViewData["Error"] += db.Courses.Find(item).Name + ", ";
enrollModel.Courses = db.Courses.ToList();
return View(enrollModel);
}
}
}
else {
ViewData["Error"] = "Student is not existed! Please input other!";
enrollModel.Courses = db.Courses.ToList();
return View(enrollModel);
}
}
else {
ViewData["Error"] = "User is not existed! Please input other!";
enrollModel.Courses = db.Courses.ToList();
return View(enrollModel);
}
}
//Enroll successfully!
TempData["Success"] = "Enrollment successfully!";
return RedirectToAction("Create");
}