/// <summary>
/// 删除Grade
/// </summary>
/// <param name="id">自增型ID</param>
public int DeleteGradeByID(int id)
{
Registration _registration = new Registration();
_registration.GradeID = id;
IList <Registration> _registrationList = _registrationService.GetBaseRegistration(_registration);
foreach (Registration Registration in _registrationList)
{
_registrationService.DeleteRegistrationByID(Registration.ID);
}
return(_gradeDao.DeleteGradeByID(id));
}
