业务逻辑的正确位置是什么？

Question

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想要改进此问题吗？更新问题，使其关于- Stack Overflow 的主题。

13 年前已关闭。

Answer 1

一种解决方案是使用服务层来为您处理这个问题：

public Interface IStackoverflowService
{
    IEnumerable<Question> GetRecentQuestions();
    void PostAnswer(Question question, Answer answer);
}

public class StackoverflowService : IStackoverflowService
{
    private StackoverflowDbContext _container;

    public StackoverflowService(StackoverflowDbContext container)
    {
        _container = container;
    }

    public IEnumerable<Question> GetRecentQuestions() 
    { 
         var model = _container.Questions.OrderByDescending(x => x.Posted);
         return model.Take(20);
    } 

    public void PostAnswer(Question question, Answer answer) { ... }
}

然后在您的控制器中：

public class HomeController : Controller
{
    private IStackoverflowService _stackoverflowService;

    public HomeController(IStackoverflowService stackoverflowService)
    {
        _stackoverflowService = stackoverflowService;
    }

    public ActionResult Index()
    {
        var model = _stackoverflowService.GetRecentQuestions();
        return View(model);
    }
}

您甚至可以将其分解为多个服务，例如 QuestionsService、AnswersService， UsersService 等。