asp.net-mvc – 哪里可以将商业模式转换成模型？

以下是典型的GET控制器操作可能如下所示：

public ActionResult Foo(int id)
{
    // the controller queries the repository to retrieve a domain model
    Bar domainModel = Repository.Get(id);

    // The controller converts the domain model to a view model
    // In this example I use AutoMapper,so the controller actually delegates
    // this mapping to AutoMapper but if you don't have a separate mapping layer
    // you could do the mapping here as well.
    BarViewModel viewModel = Mapper.Map<Bar,BarViewModel>(domainModel);

    // The controller passes a view model to the view
    return View(viewModel);
}

当然可以用自定义的动作过滤器来缩短,以避免重复的映射逻辑：

[AutoMap(typeof(Bar),typeof(BarViewModel))]
public ActionResult Foo(int id)
{
    Bar domainModel = Repository.Get(id);
    return View(domainModel);
}

AutoMap自定义操作过滤器预订了OnActionExecuted事件,拦截传递给视图结果的模型,调用映射图层(AutoMapper在我的情况下)将其转换为视图模型并将其替换为视图.视图当然是强烈类型的视图模型.