的NullReferenceException在DevTrends.MvcDonutCaching.KeyGenerator.GenerateKey

Question

我在通過@Aviv在這篇文章中描述的問題： http://www.devtrends.co.uk/blog/donut-output-caching-in-asp.net-mvc-3#125

我找了錯誤這裏和Codeplex，但沒有找到。

環境是中等信任！

路線

public static void RegisterRoutes(RouteCollection routes) 
{ 
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); 
    routes.IgnoreRoute("{*favicon}", new { favicon = @"(.*/)?favicon.ico(/.*)?" }); 
    routes.IgnoreRoute("elmah.axd"); 

    routes.MapRoute(
     "Default", // Route name 
     "{controller}/{action}/{id}", // URL with parameters 
     new { controller = "Home", action = "Index", id = UrlParameter.Optional }, // Parameter defaults 
     new[] { "LetsGo.Controllers" } 
    ); 
} 

控制器

[DonutOutputCache(CacheProfile = "StaticPage")] 
public ActionResult Index() 
{ 
     return View(_themeParty.Repository.Query().Published(true).ToList()); 
} 

[ChildActionOnly] 
[DonutOutputCache(CacheProfile = "DataCache")] 
public PartialViewResult Subsidiaries() { return PartialView(_subsidiaries.Repository.Query().Published().ToList()); } 

的Web.config

<caching> 
    <outputCacheSettings> 
    <outputCacheProfiles> 
     <add name="DataCache" enabled="true" duration="10800" varyByParam="*" /> 
     <add name="StaticPage" enabled="true" duration="21600" varyByParam="*" /> 
     <add name="ByHeader" enabled="true" duration="300" varyByHeader="*" /> 
    </outputCacheProfiles> 
    </outputCacheSettings> 
</caching> 

_Layout.cshtml

... 
@Html.Action("Subsidiaries", "Home", new { area = "" }) 
... 

完整的錯誤

Server Error in '/LetsGo' Application. 

Object reference not set to an instance of an object. 

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. 

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Stack Trace: 


[NullReferenceException: Object reference not set to an instance of an object.] 
    DevTrends.MvcDonutCaching.KeyGenerator.GenerateKey(ControllerContext context, CacheSettings cacheSettings) +777 
    DevTrends.MvcDonutCaching.DonutOutputCacheAttribute.ExecuteCallback(ControllerContext context, Boolean hasErrors) +43 
    System.Web.Mvc.ControllerActionInvoker.InvokeExceptionFilters(ControllerContext controllerContext, IList`1 filters, Exception exception) +168 
    System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +652 
    System.Web.Mvc.Controller.ExecuteCore() +161 
    System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +304 
    System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +61 
    System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +19 
    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +461 
    System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +370 

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272 

Answer 1

好像有在此錯誤：

http://mvcdonutcaching.codeplex.com/workitem/2533