public void GetById(int id, Action <Participant, Exception> callback) { try { using (ParticipantsEntities _entities = new ParticipantsEntities()) { var participant = _entities.Participants.Single(p => p.Id == id); callback(participant, null); } } catch (Exception e) { callback(null, e); } }
public void GetAll(Action <IEnumerable <Participant>, Exception> callback) { try { using (ParticipantsEntities _entities = new ParticipantsEntities()) { var ps = _entities.Participants; callback(ps, null); } } catch (Exception e) { callback(null, e); } }
public void Delete(int id, Action <Exception> callback) { try { using (ParticipantsEntities _entities = new ParticipantsEntities()) { var toBeRemoved = _entities.Participants.Single(item => item.Id == id); _entities.Participants.Remove(toBeRemoved); _entities.SaveChanges(); callback(null); } } catch (Exception e) { callback(e); } }
public void Update(Participant participant, Action <Exception> callback) { try { using (ParticipantsEntities _entities = new ParticipantsEntities()) { var old = _entities.Participants.Single(item => item.Id == participant.Id); old.FirstName = participant.FirstName; // Not nice, but demo purpose only... ;-) old.LastName = participant.LastName; old.Company = participant.Company; _entities.SaveChanges(); callback(null); } } catch (Exception e) { callback(e); } }