public static bool SaveTalk(TalkInformation newTalk)
{
var speaker = DATABASE.Speakers.SingleOrDefault(s =>
s.FirstName == newTalk.SpeakerFirstName && s.LastName == newTalk.SpeakerLastName);
if (speaker == null)
{
// Warn the user that no speaker exists with that name
MessageBox.Show($"No speaker exists with the name {newTalk.SpeakerFirstName} {newTalk.SpeakerLastName}",
"Canceling Save",
MessageBoxButton.OK);
return(false);
}
// If the database doesn't have any existing sessions matching the new one, save to the database
if (!DATABASE.Talks.Any(talk => talk.DateGiven == newTalk.TalkDate &&
talk.Title == newTalk.TalkTitle &&
talk.Summary == newTalk.TalkSummary))
{
DATABASE.Talks.InsertOnSubmit(new Talk
{
DateGiven = newTalk.TalkDate,
Title = newTalk.TalkTitle,
Summary = newTalk.TalkSummary,
SpeakerID = speaker.ID,
UpdateTime = DateTime.Now,
DiagnosticInformation = new StackTrace().ToString()
});
DATABASE.SubmitChanges();
return(true);
}
return(false);
}
public static void RemoveTalk(TalkInformation removeTalk)
{
var speakerID = DATABASE
.Speakers.Single(s => s.FirstName == removeTalk.SpeakerFirstName && s.LastName == removeTalk.SpeakerLastName).ID;
var removedItem = DATABASE.Talks.Single(talk => talk.DateGiven == removeTalk.TalkDate &&
talk.Title == removeTalk.TalkTitle &&
talk.Summary == removeTalk.TalkSummary &&
talk.SpeakerID == speakerID);
DATABASE.Talks.DeleteOnSubmit(removedItem);
DATABASE.SubmitChanges();
}