Asp.net mvc 如何在ASP.Net MVC中使用CRUD，并在模式I中使用EntityFramework CodeFirst

我在MVC中有一个电话簿项目，并使用IUnitOfWork。 但是我不知道这个项目是怎么做的。 项目的链接：

请为我介绍一下这个项目

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我在这个项目中使用CRUD。

我在我的项目中使用了通用回购和UoW，如下所示。你可以参考这一点来完成你的项目。我通常有4层解决方案体系结构：

核心

• 模型类

资料

• 一般回购和UoW
• DbContext
• 代码优先迁移

网

• 具有依赖注入实现的应用程序解决方案（例如Ninject）

试验

模型类

public class User
{
        public int Id { get; set; }
        public string Name { get; set; }
}

public class Course
{
        public int Id { get; set; }
        public string Name { get; set; }
}

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());
        }

       //Other CRUD operations

}

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; }

    }

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();
        }
    }

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

    }

public class UserRepository:RepositoryBase<User>,IUserRepository
    {
        public UserRepository(IUnitOfWork unitOfWork) : base(unitOfWork)
        {
        }
    //Here you can also define functions specific to User
    }

通用存储库：

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; }

    }

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();
        }
    }

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

    }

public class UserRepository:RepositoryBase<User>,IUserRepository
    {
        public UserRepository(IUnitOfWork unitOfWork) : base(unitOfWork)
        {
        }
    //Here you can also define functions specific to User
    }

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您是否正在尝试理解UnitOfWork模式？请详细说明您的问题。是的，但我不知道如何在ServiceLayer和控制器以及Views中使用ViewModel。您的实现没有解耦。您仍然依赖于

DbContext

（您通过

IUnitOfWork.Context

公开的。在EF中，

IUnitOfWork

将为

DbContext

建模，您的存储库通常会为

DbSet

建模。

DbContext

的UnitOfWork实现公开存储库的接口并实例化具体实现。