我想你需要的是實現一個給定的實體通用功能的通用存儲庫。我最近開始在我的MVC項目中實施Repository Pattern以及Unit of Work。這是我如何做到這一點。
MyDbContext.cs:
public class MyDbContext : DbContext
{
public MyDbContext() : base("name=DefaultConnection」)
{
}
public System.Data.Entity.DbSet<User> Users { get; set; }
public System.Data.Entity.DbSet<Course> Courses { get; set; }
}
工作單位:
public class UnitOfWork : IUnitOfWork
{
//private variable for db context
private MyDbContext _context;
//initial db context variable when Unit of Work is constructed
public UnitOfWork()
{
_context = new MyDbContext();
}
//property to get db context
public MyDbContext Context
{
//if not null return current instance of db context else return new
get { return _context ?? (_context = new MyDbContext()); }
}
//save function to save changes using UnitOfWork
public void Save()
{
_context.SaveChanges();
}
}
通用存儲庫:
public class RepositoryBase<T> : IRepositoryBase<T> where T : class
{
protected readonly IUnitOfWork _unitOfWork;
private readonly IDbSet<T> _dbSet;
public RepositoryBase(IUnitOfWork unitOfWork)
{
_unitOfWork = unitOfWork;
_dbSet = _unitOfWork.Context.Set<T>();
}
public virtual void Save()
{
_unitOfWork.Save();
}
public virtual void Add(T entity)
{
_dbSet.Add(entity);
_unitOfWork.Save();
}
//Similarly you can have Update(), Delete(), GetAll() implementation here
}
實體庫從通用回購繼承:
public class UserRepository:RepositoryBase<User>,IUserRepository
{
public UserRepository(IUnitOfWork unitOfWork) : base(unitOfWork)
{
}
//Here you can also define functions specific to User
}
控制器:
public class UserController : Controller
{
private readonly IUserRepository _dbUserRepository;
public UserController(IUserRepository dbUserRepository)
{
_dbUserRepository = dbUserRepository;
}
// GET: /User/
public ActionResult Index()
{
var users = _dbUserRepository.GetAll();
return View(users.ToList());
}
}