EF架构~豁出去了,为了IOC,为了扩展,改变以前的IRepository接口_.NET_编程开发_程序员俱乐部

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使用了4年的IRepository数据仓储接口,今天要改变了,对于这个数据仓储操作接口,它提倡的是简洁,单纯,就是对数据上下文的操作,而直正的数据上下文本身我们却把它忽略了,在我的IRepository接口里根本没有数据上下文对象,这是不完整的,也许你会说,我使用了基类,数据基类里有数据上下文,是的,我也是那样用的,但有时,这种方法有些死板了,真的,当你碰到IOC时,这种方式的短板就出来了,即,每个反射出来的Repository对象都是独立的,每个对象里的上下文也都是独立的,这是重点,由于上下文是独立的,所以,很多事我们都没法干,这包括<JOIN关联查询,非MSDTC的事务>,看了上面的这么多原因,所以,才决定,扩展我的IRepository接口,当然,严格说,这违背了面向对象的原则,接口不提倡扩展,只提倡新建,呵呵.

全新的IRepository接口

class="code_img_closed" src="/Upload/Images/2014050817/0015B68B3C38AA5B.gif" alt="" />logs_code_hide('082ebb75-33be-4b82-a255-6ff59b7389d3',event)" src="/Upload/Images/2014050817/2B1B950FA3DF188F.gif" alt="" />

 /// <summary>
    /// 基础的数据操作规范
    /// </summary>
    /// <typeparam name="TEntity"></typeparam>
    public interface IRepository<TEntity>
           where TEntity : class
    {
        /// <summary>
        /// 设定数据上下文,它一般由构架方法注入
        /// </summary>
        /// <param name="unitOfWork"></param>
        void SetDbContext(IUnitOfWork unitOfWork);

        /// <summary>
        /// 添加实体并提交到数据服务器
        /// </summary>
        /// <param name="item">Item to add to repository</param>
        void Insert(TEntity item);

        /// <summary>
        /// 移除实体并提交到数据服务器
        /// 如果表存在约束，需要先删除子表信息
        /// </summary>
        /// <param name="item">Item to delete</param>
        void Delete(TEntity item);

        /// <summary>
        /// 修改实体并提交到数据服务器
        /// </summary>
        /// <param name="item"></param>
        void Update(TEntity item);

        /// <summary>
        /// 得到指定的实体集合（延时结果集）
        /// Get all elements of type {T} in repository
        /// </summary>
        /// <returns>List of selected elements</returns>
        IQueryable<TEntity> GetModel();

        /// <summary>
        /// 根据主键得到实体
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        TEntity Find(params object[] id);
    }

View Code

在 DbContext数据基类中的实现

       public void SetDbContext(IUnitOfWork unitOfWork)
        {
            this.Db = (DbContext)unitOfWork;
            this.UnitWork = unitOfWork;
        }

 

在IOC中的使用

      IUnitOfWork db;
      IRepository<Question_Info> question_InfoRepository;
      public EFController()
        {
         
            //反射出仓储对象
            db = ServiceLocator.Instance.GetService<IUnitOfWork>();
            question_InfoRepository = ServiceLocator.Instance.GetService<IRepository<Question_Info>>();
             //为仓储对象设置上下文
            question_InfoRepository.SetDbContext(db);
}

在写JOIN查询时,它是被支持的,因为它的数据上下文是同一个

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" 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