GenericRepository

　

    public interface IGenericRepository<TEntity> where TEntity : class
    {
        IQueryable<TEntity> GetAll();
        IQueryable<TEntity> FindBy(Expression<Func<TEntity , bool>> predicate);
        void Add(TEntity entity);
        void Delete(TEntity  entity);
        void Edit(TEntity  entity);
        void Save();
    }

    public class GenericRepository<TEntity> : IGenericRepository<TEntity> where TEntity : class
    {
        private readonly DbContext _context;
        private readonly IDbSet<TEntity> _entities;

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

        public virtual IQueryable<TEntity> GetAll()
        {
            IQueryable<TEntity> query = _entities;
            return query;
        }

        public IQueryable<TEntity> FindBy(Expression<Func<TEntity, bool>> predicate)
        {
            IQueryable<TEntity> query = _entities.Where(predicate);
            return query;
        }

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

        public virtual void Delete(TEntity entity)
        {
            _entities.Remove(entity);
        }

        public virtual void Edit(TEntity entity)
        {
           // entity.State = EntityState.Modified;
        }

        public virtual void Save()
        {
            //_entities.SaveChanges();
        }
    }

　

    public class MyContext : DbContext
    {
        public MyContext(){}

        public MyContext(string nameOrConnectionString)
            : base(nameOrConnectionString)
        {
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();   //取消级联删除设置

            modelBuilder.Entity<Area>().ToTable("Area");
            base.OnModelCreating(modelBuilder);
        }

        public DbSet<Area> Area { get; set; }
    }

    public class AreaRepository : IAreaRepository
    {
        private GenericRepository<Area> internalGenericRepository;

        public AreaRepository(GenericRepository<Area> internalGenericRepository)
        {
            this.internalGenericRepository = internalGenericRepository;
        }

        public List<Area> GetAllProvince()
        {
            var query = from o in this.internalGenericRepository.GetAll()
                        //where o.AreaTypeID == AreaTypeEnum.Province
                   select o;

            return query.ToList();
        }
    }

public class AreaService : IAreaService
    {
        private readonly IAreaRepository _AreaRepository;

        public AreaService(IAreaRepository areaRepository)
        {
            this._AreaRepository = areaRepository;
        }

        public List<DictionaryEntry> ProvinceList {
            get {
                var query = from o in this._AreaRepository.GetAllProvince()
                            select new DictionaryEntry(o.Name, o.Id);

                return query.ToList();
            }
        }
    }

IUnityContainer  container = new UnityContainer();
container.RegisterInstance<DbContext>(new MyContext("ConnectionString"));　//注册实例
container.RegisterType<IAreaService, AreaService>();
container.RegisterType<IAreaRepository, AreaRepository>();
container.RegisterType(typeof(IGenericRepository<>), typeof(GenericRepository<>));

var IAreaService = container.Resolve<IAreaService>();    //实例化接口
Console.WriteLine(IAreaService.ProvinceList.Count());