我正在尝试基于首先使用实体框架代码的MyFinance示例创建基本存储库类.我想将其更改为仅使用Entity Framework.该示例使用IDbSet,但我不知道如何将其更改为仅仅为vanilla Entity Framework.也许ObjectSet< T>?当我使用ObjectSet< T>时我失去了一些像GetById这样的方法,所以也许这不是100%正确的.任何帮助将不胜感激.
首先使用Entity Framework代码示例存储库库
public abstract class RepositoryBase<T> where T : class { private MyFinanceContext dataContext; private readonly IDbSet<T> dbset; protected RepositoryBase(IDatabaseFactory databaseFactory) { DatabaseFactory = databaseFactory; dbset = DataContext.Set<T>(); } protected IDatabaseFactory DatabaseFactory { get; private set; } protected MyFinanceContext DataContext { get { return dataContext ?? (dataContext = DatabaseFactory.Get()); } } public virtual void Add(T entity) { dbset.Add(entity); } public virtual void Update(T entity) { dbset.Attach(entity); dataContext.Entry(entity).State = EntityState.Modified; } public virtual void Delete(T entity) { dbset.Remove(entity); } public virtual void Delete(Expression<Func<T,bool>> where) { IEnumerable<T> objects = dbset.Where<T>(where).AsEnumerable(); foreach (T obj in objects) dbset.Remove(obj); } public virtual T GetById(long id) { return dbset.Find(id); } public virtual T GetById(string id) { return dbset.Find(id); } public virtual IEnumerable<T> GetAll() { return dbset.ToList(); } public virtual IEnumerable<T> GetMany(Expression<Func<T,bool>> where) { return dbset.Where(where).ToList(); } public T Get(Expression<Func<T,bool>> where) { return dbset.Where(where).FirstOrDefault<T>(); }
}
我认为我应该将其更改为EntityFramework
public abstract class BaseRepository<T> where T : class { private MyDBContainer _dataContext; private readonly ObjectSet<T> dbset; protected BaseRepository(IDatabaseFactory databaseFactory) { DatabaseFactory = databaseFactory; dbset = DataContext.CreateObjectSet<T>(); } protected IDatabaseFactory DatabaseFactory { get; private set; } protected MyDBContainer DataContext { get { return _dataContext ?? (_dataContext = DatabaseFactory.DataContext); } } public virtual void Add(T entity) { dbset.Addobject(entity); } //public virtual void Update(T entity) //{ // dbset.Attach(entity); // _dataContext.Entry(entity).State = EntityState.Modified; //} public virtual void Delete(T entity) { dbset.DeleteObject(entity); } public virtual void Delete(Expression<Func<T,bool>> where) { IEnumerable<T> objects = dbset.Where<T>(where).AsEnumerable(); foreach (T obj in objects) dbset.DeleteObject(obj); } //public virtual T GetById(long id) //{ // return dbset.(id); //} //public virtual T GetById(string id) //{ // return dbset.Find(id); //} public virtual IEnumerable<T> GetAll() { return dbset.ToList(); } public virtual IEnumerable<T> GetMany(Expression<Func<T,bool>> where) { return dbset.Where(where).ToList(); } public T Get(Expression<Func<T,bool>> where) { return dbset.Where(where).FirstOrDefault<T>(); } }
解决方法
对象集< T>是DbSet T的前体.并且它是相关的接口IDbSet< T>.但是没有,因为我确定你已经发现了IObjectSet< T>,但你应该使用ObjectSet< T>代替DbSet< T>.