public IActionResult EnrollmentCreate(int?id)
{
var courses = _context.Enrollment.Include(e => e.Student).Where(e => e.CourseId == id).FirstOrDefault();
NewStudentEnrollmentsViewModel coursestudent = new NewStudentEnrollmentsViewModel
{
Enrollments = courses,
StudentsList = new MultiSelectList(_context.Student.OrderBy(s => s.FirstName), "Id", "FullName"),
SelectedStudents = _context.Enrollment
.Where(s => s.CourseId == id)
.Include(m => m.Student).Select(sa => sa.StudentId)
};
return(View(coursestudent));
}
public async Task <IActionResult> EnrollmentCreate(int id, NewStudentEnrollmentsViewModel newStudentEnrollmentsViewModel)
{
IEnumerable <int> listStudents = newStudentEnrollmentsViewModel.SelectedStudents;
IEnumerable <int> existStudents = _context.Enrollment.Where(s => listStudents.Contains(s.StudentId) && s.CourseId == id).Select(s => s.StudentId);
IEnumerable <int> newStudents = listStudents.Where(s => !existStudents.Contains(s));
foreach (int studentId in newStudents)
{
_context.Enrollment.Add(new Enrollment {
StudentId = studentId, CourseId = id, Year = newStudentEnrollmentsViewModel.Enrollments.Year, Semester = newStudentEnrollmentsViewModel.Enrollments.Semester
});
}
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(EnrollmentIndex)));
}
