private void UpdateMemberCallings(string[] selectedCallings, Member memberToUpdate)
{
if (selectedCallings == null)
{
memberToUpdate.Calling_Members = new List <Calling_Member>();
return;
}
var selectedCallingsHS = new HashSet <string>(selectedCallings);
var memberCallings = new HashSet <int>(memberToUpdate.Calling_Members.Select(c => c.Calling.CallingId));
foreach (var calling in _context.Callings)
{
if (selectedCallingsHS.Contains(calling.CallingId.ToString()))
{
if (!memberCallings.Contains(calling.CallingId))
{
memberToUpdate.Calling_Members.Add(new Calling_Member {
MemberId = memberToUpdate.MemberId, CallingId = calling.CallingId
});
}
}
else
{
if (memberCallings.Contains(calling.CallingId))
{
Calling_Member callingToRemove = memberToUpdate.Calling_Members.FirstOrDefault(i => i.CallingId == calling.CallingId);
_context.Remove(callingToRemove);
}
}
}
}