public ParticipationEntity Update (ParticipationEntity entity)
		{
			try
            {
                _participationRepository.Update(entity);
                return entity;
            }
            catch (Exception e)
            {
				_log.Error(e,"数据库操作出错");
                return null;
            }
		}
		public bool Delete(ParticipationEntity entity)
		{
			try
            {
                _participationRepository.Delete(entity);
                return true;
            }
            catch (Exception e)
            {
				_log.Error(e,"数据库操作出错");
                return false;
            }
		}