6

对于 STE 有什么更好的实现,我听说 DbContext 是使用 EF 实现 Repo 的最简单方法,我个人利用了 EntityState,但是 ObjectContext 上有任何成员可以为我的 CRUD 操作提供更多功能使用回购?今天我正在使用像这样的 GenericRepository :

public class GenericRepository<TEntity> where TEntity : class
    {
        internal DbContext context;
        internal DbSet<TEntity> dbSet;

        public GenericRepository(DbContext context)
        {
            this.context = context;
            this.dbSet = context.Set<TEntity>();
        }

        public virtual IEnumerable<TEntity> Get(
            Expression<Func<TEntity, bool>> filter = null,
            Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
            string includeProperties = "")
        {
            IQueryable<TEntity> query = dbSet;

            if (filter != null)
            {
                query = query.Where(filter);
            }

            foreach (var includeProperty in includeProperties.Split
                (new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
            {
                query = query.Include(includeProperty);
            }

            if (orderBy != null)
            {
                return orderBy(query).ToList();
            }
            else
            {
                return query.ToList();
            }
        }

        public virtual TEntity GetByID(object id)
        {
            return dbSet.Find(id);
        }

        public virtual void Insert(TEntity entity)
        {
            dbSet.Add(entity);
        }

        public virtual void Delete(object id)
        {
            TEntity entityToDelete = dbSet.Find(id);
            Delete(entityToDelete);
        }

        public virtual void Delete(TEntity entityToDelete)
        {
            if (context.Entry(entityToDelete).State == EntityState.Detached)
            {
                dbSet.Attach(entityToDelete);
            }
            dbSet.Remove(entityToDelete);
        }

        public virtual void Update(TEntity entityToUpdate)
        {
            dbSet.Attach(entityToUpdate);
            context.Entry(entityToUpdate).State = EntityState.Modified;
        }

        public virtual IEnumerable<TEntity> GetWithRawSql(string query, params object[] parameters)
        {
            return dbSet.SqlQuery(query, parameters).ToList();
        }
    }

我忘了提到我也在使用 Unity,所以对 Repository 的调用是这样的:

[Dependency]
        public IUnityContainer Container { get; set; }

        public List<Case> GetAll()
        {
            using (var context = Container.Resolve<ClaimEntities>())
            {
                var qry = (from c in context.Cases
                           select c).ToList();
                return qry;
            }
        }
4

1 回答 1

4

自我跟踪实体是 ObjectContext 的功能 - DbContext 不支持它们。如果您想要 STE,您需要切换到 ObjectContext API 并使用 STEs T4 模板来生成实体,而不是您当前的 POCO。

于 2011-05-11T22:06:47.207 回答