public ActionResult Multiple(long pollId, [FromForm] long[] choices)
{
if (choices.Length == 0)
{
TempData["ErrorMessage"] = "List of choices is empty!";
}
else
{
// assert all choices belongs to selected poll
// first: select all known choices from poll #pollId
long [] knownChoices =
_db.PollChoices.Where(ch => ch.PollId == pollId)
.Select(ch => ch.Id)
.ToArray();
// lookup for any unknown choices among param choices
if (choices.Except(knownChoices).Count() > 0)
{
TempData["ErrorMessage"] = "Wrong choices! (not belongs to given poll)";
}
else
{
// this ip voted for this poll?
if (_db.PollVotes2.Count(v => v.PollId == pollId && v.IpAddress == _ip) > 0)
{
TempData["ErrorMessage"] = "You can't vote more then once on this poll!";
}
else
{
// OK to save vote
_db.PollVotes2.Add(new PollVotes2()
{
Id = _db.NextPollVote2Id(),
PollId = pollId,
IpAddress = _ip,
UserAgent = _ua,
PollChoices = string.Join(",", choices.Select(c => c.ToString()).ToArray())
});
}
}
}
return(RedirectToAction("Show", "Polls"));
}