void IDL.updateTrainee(int id, Trainee updatedTrainee)
{
XElement traineeElement = (from item in TraineeRoot.Elements()
where int.Parse(item.Element("ID").Value) == id
select item).FirstOrDefault();
if (traineeElement == null)
{
throw new TraineesIdNotFoundException(id);
}
traineeElement.Remove();
TraineeRoot.Add(updatedTrainee.ToXmlTrainee());
TraineeRoot.Save(TraineePath);
}
void IDL.addTrainee(Trainee trainee)
{
int id = (from item in TraineeRoot.Elements()
where (int.Parse(item.Element("ID").Value) == trainee.ID)
select(int.Parse(item.Element("ID").Value))).FirstOrDefault();
if (id != 0)
{
throw new TraineesIdAlreadyExistsException(trainee.ID, trainee.FirstName + " " + trainee.LastName);
}
TraineeRoot.Add(trainee.ToXmlTrainee());
TraineeRoot.Save(TraineePath);
}