.net core仓储(Repository)模型

仓储是存在于工作单位和数据库之间单独分离出来的，是对数据访问层的封装。其优点是：达到了分离关注点；提高了对数据库访问的维护，对仓储的改变并不会改变业务逻辑。使用仓储模型，可以实现解耦数据访问层与业务层。

仓储层的搭建：

一、定义Repository接口类(IBaseRepository)：

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public interface IBaseRepository<T> where T : class     {         /// <summary>         /// 新增         /// </summary>         /// <param name="t"></param>         void AddEntity(T t);           /// <summary>         /// 删除         /// </summary>         /// <param name="t"></param>         void DeleteEntity(T t);           /// <summary>         /// 修改         /// </summary>         /// <param name="t"></param>         void UpdateEntity(T t);           /// <summary>         /// 查询         /// </summary>         /// <returns></returns>         IQueryable<T> GetAll();     }

 二、定义Repository实体类(BaseRepository)，继承Repository接口类(IBaseRepository),实现其接口中的方法:

 

public class BaseRepository<T> : IBaseRepository<T> where T : class
    {
        /// <summary>
        /// DB上下文
        /// </summary>
        private readonly RBACDBContext _context;

        public BaseRepository(RBACDBContext context)
        {
            _context = context;
        }

        /// <summary>
        /// 新增
        /// </summary>
        /// <param name="t"></param>
        /// <exception cref="NotImplementedException"></exception>
        public void AddEntity(T t)
        {
            throw new NotImplementedException();
        }/// <summary>
        /// 删除
        /// </summary>
        /// <param name="t"></param>
        /// <exception cref="NotImplementedException"></exception>
        public void DeleteEntity(T t)
        {
            throw new NotImplementedException();
        }

        /// <summary>
        /// 查询
        /// </summary>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public IQueryable<T> GetAll()
        {
            throw new NotImplementedException();
        }/// <summary>
        /// 修改
        /// </summary>
        /// <param name="t"></param>
        /// <exception cref="NotImplementedException"></exception>
        public void UpdateEntity(T t)
        {
            throw new NotImplementedException();
        }
    }

三、进行简单的数据库操作：

1、定义用户的服务接口(IUserService):

/// <summary>
        /// 用户登录
        /// </summary>
        /// <param name="userName">用户名</param>
        /// <param name="password">密码</param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>

public interface IUserService : IBaseService<UserInfo>
    {
        UserInfo UserLogin(string? userName, string? password);
    }

2、定义用户的服务类(UserService)，实现用户服务接口(IUserService)中的方法：

public class UserService : BaseService<UserInfo> , IUserService
    {
        private readonly IUserRepository _userRepository;public UserService(IUserRepository userRepository) : base(userRepository)
        {
            _userRepository = userRepository;
        }/// <summary>
        /// 用户登录
        /// </summary>
        /// <param name="userName">用户名</param>
        /// <param name="password">密码</param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public UserInfo UserLogin(string? userName, string? password)
        {
            var userInfo = _userRepository.GetAll().FirstOrDefault(x => x.UserName == userName && x.Password == password);
            return userInfo;
        }
    }
}