Question

我在努力正确实施存储库。所有数据操作都必须通过存储过程完成（我不想争辩是对还是错）

在启动中，我注册dbcontext。 dbcontext和DbQuery对象使我可以从数据库中读取数据。

但是我还需要实现我尝试过的存储库接口。但是我的实现只允许我通过DbSet执行存储过程，但是我无法使用ExecuteSqlCommand或DbQuery对象来检索数据。

我想在一个存储库实现中使用DBSet，DbQuery以及DbSet。怎么做？我应该在每个存储库中创建ExecuteSqlCommand还是共享new DbContext还是存储库继承DbContext via dependency injection？

Startup.cs

DbContext

DbContext

services.AddDbContext<Database>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

BusinessRepository.cs 我有自定义存储库，可以执行存储过程

public class Database : DbContext
    {

        public Database(DbContextOptions<Database> options) : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
        }

        public virtual DbQuery<Business> Business { get; set; }

        // working
        public IEnumerable<Business> GetBusiness(int id)
        {
            var query = @"exec query.usp_GetBusiness @id";
            var p1 = new SqlParameter("@id", id);
            return Business.FromSql(query, p1).ToList();
        }
}

问题底线

将所有存储库包装到某个masterRepository对象并调用诸如public class BusinessRepository :IBusinessRepository { private readonly IHttpContextAccessor _httpAccessor; private readonly DatabaseFacade database; public BusinessRepository(IConfiguration configuration, IHttpContextAccessor httpAccessor) { DbContextOptions dbContextOptions = new DbContextOptionsBuilder() .UseSqlServer(configuration.GetConnectionString("DefaultConnection")) .Options; database = new DbContext(dbContextOptions).Database; _httpAccessor = httpAccessor; } // working public void UpdateBusinessName(string Name) { database.ExecuteSqlCommand("exec command.usp_UpdateBusinessName @user, @name", new SqlParameter("user", _httpAccessor.HttpContext.User.Identity.Name), new SqlParameter("name", Name) ); } // this does not work, because repository does not inherit from dbContext public virtual DbQuery<Business> Business { get; set; } // not working, Business.FromSql(query, p1) returns ArgumentNullException ! public IEnumerable<Business> GetBusiness(int id) { var query = @"exec query.usp_GetBusiness @id"; var p1 = new SqlParameter("@id", id); return Business.FromSql(query, p1).ToList(); } }之类的存储库是个好主意，优点是我只能输入一个对象作为包含所有命令的参数，缺点是我创建了存储库实例我不使用每个请求。你觉得呢？

我知道这是一个复杂的问题，因此我非常感谢您的回答。

Answer 1

我听取了评论的建议，这是我第一个可行的解决方案。这可能不是最佳做法，但至少可以奏效。

Startup.cs

services.AddDbContext<AppContext>(options =>
                options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

DbContext

public class AppContext : DbContext
    {
        public AppContext (DbContextOptions<AppContext> options) : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
        }
        public virtual DbQuery<Business> Business { get; set; }

    }

BusinessRepository.cs

 public class BusinessRepository :IBusinessRepository
    {
        private readonly AppContext _context;

        public BusinessRepository(AppContext context)
        {
            _context = context;
        }

        // working
        public IEnumerable<Business> GetBusiness(int id)
        {
             var query = @"exec query.usp_GetBusiness @id";
             var p1 = new SqlParameter("@id", id);
             return _context.Business.FromSql(query, p1).ToList();
        }

        // working
        public void UpdateBusinessName(string name, string user)
        {
            _context.Database.ExecuteSqlCommand("exec command.usp_UpdateBusinessName @user, @name",
                new SqlParameter("user", user),
                new SqlParameter("name", name)
            );
        }
}

.net core 2如何正确实施存储库

1 个答案: