自定义模型粘合剂不会触发

Question

我在global.asax中为MyList注册了一个自定义模型绑定器.但是,模型绑定器不会触发嵌套属性,对于简单类型,它可以正常工作.在下面的示例中,它会触发Index()但不会触发Index2()

Global.asax中

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();

    ModelBinders.Binders.Add(typeof(MyList), new MyListBinder());

    WebApiConfig.Register(GlobalConfiguration.Configuration);
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    RouteConfig.RegisterRoutes(RouteTable.Routes);
}

码:

public class MyListBinder : IModelBinder
{
    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        return new MyList();
    }
}

public class MyList
{
    public List<int> items { get; set; }
}

public class MyListWrapper
{
    public MyList listItems { get; set; }
}

public class TestController : Controller
{
    public ActionResult Index(MyList list)  // ModelBinder fires :-)
    {            
        return View();
    }

    public ActionResult Index2(MyListWrapper wrapper) // ModelBinder does not fire! :-(
    {
        return View();
    }
}

Answer 1

您的模型绑定器与您的 MyList 类匹配，而不是与 MyListWrapper 匹配。MyListBinder仅与MyList类或从MyClass继承的类一起使用。