public async Task <IActionResult> UnEnrollMultiple(int id, UnEnrollMultipleViewModel vm)
{
IEnumerable <double> listStudents = vm.SelectedStudents;
IEnumerable <Enrollment> toBeRemoved = _context.Enrollment.Where(s => listStudents.Contains(s.StudentId) && s.CourseId == id);
foreach (var enr in toBeRemoved)
{
_context.Enrollment.Remove(enr);
await _context.SaveChangesAsync();
}
return(RedirectToAction(nameof(Index)));
}
public async Task <IActionResult> UnEnrollMultiple(int?id)
{
var course = await _context.Course.Where(m => m.Id == id).Include(m => m.Students).FirstOrDefaultAsync();
IEnumerable <Student> students = _context.Enrollment.Where(m => m.CourseId == id).Select(sa => sa.Student);
var vm = new UnEnrollMultipleViewModel
{
StudentsList = new MultiSelectList(students.OrderBy(s => s.Id), "Id", "FullName"),
SelectedStudents = course.Students.Select(sa => sa.StudentId)
};
return(View(vm));
}
