ASP.NET MVC3 RC2 <AllowHtml()>不能正常工作

Question

我有我的輸入裝飾如下。

<AllowHtml()> 
<UIHint("MarkDown")> 
<DisplayName("about")> 
<Required(ErrorMessage:="Description is required")> 
<StringLength(2048, ErrorMessage:="Description is too long")> 
Public Property Description As String 

我的編輯模板看起來像這樣

@ModelType String 

<noscript><h3>Please use @Html.ActionLink("Markdown", "Markdown", "About") to style your input.</h3></noscript> 
<div id="wmd-button-bar" class="wmd-panel"></div> 
@Html.TextArea("", Model, 5, 10, New With {.id = "wmd-input", .class = "wmd-panel"}) 
<div id="wmd-preview" class="wmd-panel"></div> 
<div class="clear"></div> 

，當我嘗試和故意提交<script>標籤，我得到

檢測到有潛在危險的Request.Form值YSOD從客戶端（描述=「...這裏，<script>
var a = b; ...」）。

我的問題：我該如何做這項工作？

編輯

這裏的控制器的操作方法

''# fix stack overflow code coloring 
''# <AcceptVerbs(HttpVerbs.Post)> 
Function Edit(ByVal user As Domain.User, ByVal id As Integer) As ActionResult 
    If AuthenticationHelper.RetrieveAuthUser.ID = id Then 
     If Not user.RegionID.HasValue Then ModelState.AddModelError("UserRegion", "Invalid region selected") 

     ''# We only want to process the View Data if the state of theB 
     ''# Model is valid. If it's not valid, we send the user back to 
     ''# the View with some validation instructions. This really only 
     ''# happens if the user has JavaScript disabled because we're also 
     ''# using Client Side validation for a friendlier user experience. 
     If ModelState.IsValid Then 

      ''# We want to update the user record before we expire and 
      ''# re-issue the authentication cookie so that the new data 
      ''# will be issued to the new authcookie. 
      UserService.UpdateUser(user) 
      UserService.SubmitChanges() 

      ''#Expire the cookie and recreate it 


      ''# when all is said and done, send the user 
      ''# back to their profile page. 
      Return RedirectToAction("Details", "Users", New With {.id = id, .slug = user.UserName.ToUrlFriendlyString}) 
     Else 
      Return View(user) 
     End If 
    Else 
     Throw New ResourceNotFoundException() 
    End If 
End Function 

這裏的堆棧跟蹤

[HttpRequestValidationException (0x80004005): A potentially dangerous Request.Form value was detected from the client (Description="... here. 
<script> 
var a = b;...").] 
    System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection) +322 
    Microsoft.Web.Infrastructure.DynamicValidationHelper.<>c__DisplayClass12.<ReplaceCollection>b__d(String value, String key) +77 
    Microsoft.Web.Infrastructure.DynamicValidationHelper.LazilyEvaluatedNameObjectEntry.ValidateObject() +89 
    Microsoft.Web.Infrastructure.DynamicValidationHelper.LazilyValidatingHashtable.get_Item(Object key) +55 
    System.Collections.Specialized.NameObjectCollectionBase.FindEntry(String key) +20 
    System.Collections.Specialized.NameValueCollection.GetValues(String name) +8 
    System.Web.Mvc.ValueProviderResultPlaceholder.GetResultFromCollection(String key, NameValueCollection collection, CultureInfo culture) +20 
    System.Web.Mvc.<>c__DisplayClass4.<.ctor>b__0() +17 
    System.Lazy`1.CreateValue() +361 
    System.Lazy`1.LazyInitValue() +9591042 
    System.Lazy`1.get_Value() +89 
    System.Web.Mvc.NameValueCollectionValueProvider.GetValue(String key, Boolean skipValidation) +64 
    System.Web.Mvc.ValueProviderCollection.GetValueFromProvider(IValueProvider provider, String key, Boolean skipValidation) +55 
    System.Web.Mvc.<>c__DisplayClass9.<GetValue>b__4(IValueProvider provider) +34 
    System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +151 
    System.Linq.WhereSelectEnumerableIterator`2.MoveNext() +177 
    System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source) +4187840 
    System.Web.Mvc.ValueProviderCollection.GetValue(String key, Boolean skipValidation) +265 
    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +386 
    System.Web.Mvc.DefaultModelBinder.GetPropertyValue(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor, IModelBinder propertyBinder) +17 
    System.Web.Mvc.DefaultModelBinder.BindProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, PropertyDescriptor propertyDescriptor) +400 
    System.Web.Mvc.DefaultModelBinder.BindProperties(ControllerContext controllerContext, ModelBindingContext bindingContext) +94 
    System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Object model) +55 
    System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +1357 
    System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +452 
    System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +320 
    System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +116 
    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +345 
    System.Web.Mvc.Controller.ExecuteCore() +115 
    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +94 
    System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10 
    System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37 
    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21 
    System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12 
    System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55 
    System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +47 
    System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7 
    System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +23 
    System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +59 
    System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 
    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +310 
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +163 

Answer 1

感謝您的報告。這是在http://forums.asp.net/p/1632006/4206895.aspx中描述的緩存錯誤的另一個表現形式。解決方法步驟相同;從Global.asax Application_Start中，輸入以下代碼行：

ModelMetadataProviders.Current = new DataAnnotationsModelMetadataProvider(); 

這將禁用錯誤緩存。