public void UpdateStudentEvents(BPA_TrackerContext context,
string[] selectedEvents, Student StudentToUpdate)
{
if (selectedEvents == null)
{
StudentToUpdate.AssignEvents = new List <AssignEvent>();
return;
}
var selectedEventsHS = new HashSet <string>(selectedEvents);
var StudentEvents = new HashSet <int>
(StudentToUpdate.AssignEvents.Select(c => c.Event.EventID));
foreach (var Event in context.Event)
{
if (selectedEventsHS.Contains(Event.EventID.ToString()))
{
if (!StudentEvents.Contains(Event.EventID))
{
StudentToUpdate.AssignEvents.Add(
new AssignEvent
{
StudentID = StudentToUpdate.StudentID,
EventID = Event.EventID
});
}
}
else
{
if (StudentEvents.Contains(Event.EventID))
{
AssignEvent EventToRemove
= StudentToUpdate
.AssignEvents
.SingleOrDefault(i => i.EventID == Event.EventID);
context.Remove(EventToRemove);
}
}
}
}
public async Task <IActionResult> OnPostAsync(string[] selectedCourses)
{
if (!ModelState.IsValid)
{
return(Page());
}
var newStudent = new Student();
if (selectedCourses != null)
{
newStudent.AssignEvents = new List <AssignEvent>();
foreach (var course in selectedCourses)
{
var coursetoadd = new AssignEvent
{
EventID = int.Parse(course)
};
newStudent.AssignEvents.Add(coursetoadd);
}
}
if (await TryUpdateModelAsync <Student>(
newStudent,
"Student",
i => i.FirstName, i => i.LastName,
i => i.StudentPhone, i => i.StudentEmail,
i => i.ParentName, i => i.ParentPhone,
i => i.ParentEmail))
{
_context.Student.Add(newStudent);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
PopulateAssignedEventData(_context, newStudent);
return(Page());
}