/// <summary>
    /// 工作(zuo)單(dan)元中倉(cang)儲接口CRUD操作(zuo)
    /// 需要使用工作單元的倉儲，需要實現本接口（IRepository,IExtensionRepository)
    /// </summary>
    public interface IUnitOfWorkRepository
    {
        /// <summary>
        /// 添加實體(ti)
        /// </summary>
        /// <param name="item"></param>
        void UoWInsert(IEntity item);
        /// <summary>
        /// 更新實體(ti)
        /// </summary>
        /// <param name="item"></param>
        void UoWUpdate(IEntity item);
        /// <summary>
        /// 移(yi)除實體
        /// </summary>
        /// <param name="item"></param>
        void UoWDelete(IEntity item);
    }

　　 /// <summary>
    /// 工作(zuo)單元
    /// 所有數(shu)據上下(xia)(xia)文(wen)對象都應(ying)該(gai)繼承它，面向倉(cang)儲的上下(xia)(xia)文(wen)應(ying)該(gai)與具(ju)體實現（存儲介(jie)質,ORM）無關(guan)
    /// </summary>
    public interface IUnitOfWork
    {
        /// <summary>
        /// 向工作單元(yuan)中注冊變更
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="entity"></param>
        /// <param name="type"></param>
        /// <param name="repository"></param>
        void RegisterChangeded(IEntity entity, SqlType type, IUnitOfWorkRepository repository);
        /// <summary>
        /// 向數據(ju)庫(ku)提交變(bian)更
        /// </summary>
        void Commit();
    }

 　 /// <summary>
    /// 工(gong)作單(dan)元，主要用于管理事(shi)務性操作
    /// Author:Lind.zhang
    /// </summary>
    public class UnitOfWork : IUnitOfWork
    {
        #region Fields
        /// <summary>
        /// 操作行為字典
        /// </summary>
        private IDictionary<IEntity, IUnitOfWorkRepository> insertEntities;
        private IDictionary<IEntity, IUnitOfWorkRepository> updateEntities;
        private IDictionary<IEntity, IUnitOfWorkRepository> deleteEntities;

        #endregion

        #region Constructor

        public UnitOfWork()
        {
            insertEntities = new Dictionary<IEntity, IUnitOfWorkRepository>();
            updateEntities = new Dictionary<IEntity, IUnitOfWorkRepository>();
            deleteEntities = new Dictionary<IEntity, IUnitOfWorkRepository>();
        }

        #endregion

        #region IUnitOfWork 成員
        /// <summary>
        /// 事務提交
        /// </summary>
        public void Commit()
        {
            try
            {
                using (TransactionScope transactionScope = new TransactionScope())
                {

                    foreach (var entity in insertEntities.Keys)
                    {
                        insertEntities[entity].UoWInsert(entity);
                    }
                    foreach (var entity in updateEntities.Keys)
                    {
                        updateEntities[entity].UoWUpdate(entity);
                    }
                    foreach (var entity in deleteEntities.Keys)
                    {
                        deleteEntities[entity].UoWDelete(entity);
                    }
                    transactionScope.Complete();//提(ti)交事務，程(cheng)序中如果(guo)出錯，這(zhe)行無法執行，即事務不會被(bei)提(ti)交，這(zhe)就類似于rollback機制
                }
            }
            catch (Exception ex)
            {
                Logger.LoggerFactory.Instance.Logger_Error(ex);
            }

        }



        /// <summary>
        /// 注冊數據變更(geng)
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="entity"></param>
        /// <param name="type"></param>
        public void RegisterChangeded(IEntity entity, SqlType type, IUnitOfWorkRepository repository)
        {
            switch (type)
            {
                case SqlType.Insert:
                    insertEntities.Add(entity, repository);
                    break;
                case SqlType.Update:
                    updateEntities.Add(entity, repository);
                    break;
                case SqlType.Delete:
                    deleteEntities.Add(entity, repository);
                    break;
                default:
                    throw new ArgumentException("you enter reference is error.");
            }
        }
        #endregion


    }

 　　　　　　 unitOfWork.RegisterChangeded(entity, SqlType.Update, userRepository);
            var userExtension = userExtRepository.Find(entity.Id);
            userExtension.NickName = Request.Form["UserExtension.NickName"];
            userExtension.School = Request.Form["UserExtension.School"];
            unitOfWork.RegisterChangeded(userExtension, SqlType.Update, userExtRepository);
            unitOfWork.Commit();