ASP.NET MVC 6 中的 TryValidateModel

Question

我正在编写类似这样的测试框架：https://github.com/ivaylokenov/MyTested.WebApi 但是对于 ASP.NET 5 MVC 6（使用 6.0.0-beta8）。

我很难尝试调用控制器的 TryValidateModel 来验证给定对象的 ModelState。它在 ASP.NET Web API 2 控制器上没有任何痛苦。我应该在控制器 class 上实例化哪些属性，以便该方法使用默认约定进行验证。无论模型和 属性 属性如何，我都会收到空引用异常或有效模型状态。

我一直在 MVC source code for a couple of hours with no luck. I have tried to set the AddMvc() services on the controller - not working for me. I even tried their testing controller type located HERE（GetController 私有方法）中搜索，但没有成功。这是我目前使用的来源：

        // TODO: for real this is how we configure controller?
        var detailsProviders = new IMetadataDetailsProvider[]
        {
            new DefaultBindingMetadataProvider(new ModelBindingMessageProvider
            {
                MissingBindRequiredValueAccessor = name => $"A value for the '{ name }' property was not provided.",
                MissingKeyOrValueAccessor = () => $"A value is required.",
                ValueMustNotBeNullAccessor = value => $"The value '{ value }' is invalid.",
            }),
            new DefaultValidationMetadataProvider(),
            new DataAnnotationsMetadataProvider(),
            // new DataMemberRequiredBindingMetadataProvider(), TODO: not available in version 8 but it is in the source code of MVC
        };

        var compositeDetailsProvider = new DefaultCompositeMetadataDetailsProvider(detailsProviders);

        var metadataProvider = new DefaultModelMetadataProvider(compositeDetailsProvider);
        var httpContext = new DefaultHttpContext();
        var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());

        var viewData = new ViewDataDictionary(metadataProvider, new ModelStateDictionary());
        var tempData = new TempDataDictionary(new HttpContextAccessor(), new SessionStateTempDataProvider());

        var bindingContext = new ActionBindingContext()
        {
            ModelBinder = new GenericModelBinder(),
            ValueProvider = new CompositeValueProvider(new IValueProvider[0]),
            InputFormatters = new List<IInputFormatter>(),
            ValidatorProvider = new DataAnnotationsModelValidatorProvider(
                options: null,
                stringLocalizerFactory: null)
        };

        this.Controller.ActionContext = actionContext;
        this.Controller.BindingContext = bindingContext;
        this.Controller.MetadataProvider = metadataProvider;
        this.Controller.ViewData = viewData;
        this.Controller.TempData = tempData;
        this.Controller.ObjectValidator = new DefaultObjectValidator(new IExcludeTypeValidationFilter[0], metadataProvider);

如有任何帮助，我们将不胜感激。提前致谢！

Answer 1

事实证明它实际上是 ASP.NET MVC 中的一个错误，团队将在下一个 RC2 版本中修复它：https://github.com/aspnet/Mvc/issues/3586