问题描述
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我似乎在这里碰到了墙，并希望任何能够做到这一点的人提供帮助。我不确定以下错误消息的含义。我正在使用企业模式服务的缓存块，但是我一直遇到以下问题。我下载了最新版本，并尝试逐步解决该问题，但是我似乎无法找出确切的问题，请寻求帮助。提前致谢
Test method WorldBank.Service.Business.UnitTest.TopicsManagerTest.Call_Children_out_of_schoolTest threw exception:
Microsoft.Practices.ServiceLocation.ActivationException: Activation error occured while trying to get instance of type ICacheManager,key \"Cache Manager\" ---> Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the dependency Failed,type = \"Microsoft.Practices.EnterpriseLibrary.Caching.ICacheManager\",name = \"Cache Manager\".
Exception occurred while: while resolving.
Exception is: InvalidOperationException - The current type,Microsoft.Practices.EnterpriseLibrary.Caching.ICacheManager,is an interface and cannot be constructed. Are you missing a type mapping?
-----------------------------------------------
At the time of the exception,the container was:
Resolving Microsoft.Practices.EnterpriseLibrary.Caching.ICacheManager,WuCache
---> system.invalidOperationException: The current type,is an interface and cannot be constructed. Are you missing a type mapping?
Microsoft.Practices.ObjectBuilder2.DynamicmethodConstructorStrategy.ThrowForAttemptingToConstructInterface(IBuilderContext context) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\ObjectBuilder\\Strategies\\Buildplan\\Dynamicmethod\\Creation\\DynamicmethodConstructorStrategy.cs: line 209
BuildUp_Microsoft.Practices.EnterpriseLibrary.Caching.ICacheManager(IBuilderContext )
Microsoft.Practices.ObjectBuilder2.DynamicmethodBuildplan.BuildUp(IBuilderContext context) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\ObjectBuilder\\Strategies\\Buildplan\\Dynamicmethod\\DynamicmethodBuildplan.cs: line 37
Microsoft.Practices.ObjectBuilder2.BuildplanStrategy.PreBuildUp(IBuilderContext context) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\ObjectBuilder\\Strategies\\Buildplan\\BuildplanStrategy.cs: line 43
Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\ObjectBuilder\\Strategies\\StrategyChain.cs: line 110
Microsoft.Practices.Unity.UnityContainer.dobuildUp(Type t,Object existing,String name,IEnumerable`1 resolverOverrides) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\UnityContainer.cs: line 511
Microsoft.Practices.Unity.UnityContainer.dobuildUp(Type t,IEnumerable`1 resolverOverrides) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\UnityContainer.cs: line 515
Microsoft.Practices.Unity.UnityContainer.Resolve(Type t,ResolverOverride[] resolverOverrides) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\UnityContainer.cs: line 173
Microsoft.Practices.Unity.UnityServiceLocator.DoGetInstance(Type serviceType,String key) in e:\\Builds\\Unity\\UnityTemp\\Compile\\Unity\\Unity\\Src\\UnityServiceLocator.cs: line 64
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type serviceType,String key) in c:\\Home\\Chris\\Projects\\CommonServiceLocator\\main\\Microsoft.Practices.ServiceLocation\\ServiceLocatorImplBase.cs: line 49
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type serviceType,String key) in c:\\Home\\Chris\\Projects\\CommonServiceLocator\\main\\Microsoft.Practices.ServiceLocation\\ServiceLocatorImplBase.cs: line 53
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[TService](String key) in c:\\Home\\Chris\\Projects\\CommonServiceLocator\\main\\Microsoft.Practices.ServiceLocation\\ServiceLocatorImplBase.cs: line 103
Microsoft.Practices.EnterpriseLibrary.Caching.CacheFactory.InnerGetCacheManager(String cacheManagerName) in e:\\Builds\\EntLib\\Latest\\Source\\Blocks\\Caching\\Src\\Caching\\CacheFactory.cs: line 66
Microsoft.Practices.EnterpriseLibrary.Caching.CacheFactory.GetCacheManager(String cacheManagerName) in e:\\Builds\\EntLib\\Latest\\Source\\Blocks\\Caching\\Src\\Caching\\CacheFactory.cs: line 53
WorldBank.Service.Business.ResponseManager.Get_w_Utility() in C:\\SOOfficialPiece\\WorldBank.Service.Business\\ResponseManager.cs: line 42
WorldBank.Service.Business.ResponseManager..ctor() in C:\\SOOfficialPiece\\WorldBank.Service.Business\\ResponseManager.cs: line 34
WorldBank.Service.Business.ResponseManager.getResponSEObjectJSON(Int32 perpage,Object results,Boolean doDeepRetrieval) in C:\\SOOfficialPiece\\WorldBank.Service.Business\\ResponseManager.cs: line 68
System.Dynamic.UpdateDelegates.UpdateAndExecute4[T0,T1,T2,T3,TRet](CallSite site,T0 arg0,T1 arg1,T2 arg2,T3 arg3)
WorldBankBusiness.Topics.TopicsManager.Call_Children_out_of_school(PersonType persontype,EnrollmentType enrollmenttype,String countrycode) in C:\\SOOfficialPiece\\WorldBank.Service.Business\\TopicsManager.cs: line 39
WorldBank.Service.Business.UnitTest.TopicsManagerTest.Call_Children_out_of_schooltest() in C:\\SOOfficialPiece\\WorldBank.Service.Business.UnitTest\\TopicsManagerTest.cs: line 88
解决方法
缓存应用程序块需要在app / web.config中存在一些配置信息才能使用（AFAIK，不幸的是，很难找到其他说明的文档）。如果没有该配置信息，则以下代码将导致抛出与您看到的相同的异常：
var cm = CacheFactory.GetCacheManager(\"MyCacheManager\");
CacheManager
CacheManager
<configuration>
<configSections>
<section name=\"cachingConfiguration\"
type=\"Microsoft.Practices.EnterpriseLibrary.Caching.Configuration.CacheManagerSettings,Microsoft.Practices.EnterpriseLibrary.Caching,Version=5.0.414.0,Culture=neutral,PublicKeyToken=31bf3856ad364e35\" requirePermission=\"true\" />
</configSections>
<cachingConfiguration defaultCacheManager=\"MyCacheManager\">
<cacheManagers>
<add name=\"MyCacheManager\" type=\"Microsoft.Practices.EnterpriseLibrary.Caching.CacheManager,PublicKeyToken=31bf3856ad364e35\"
expirationPollFrequencyInSeconds=\"60\"
maximumElementsInCacheBeforeScavenging=\"50000\"
numberToRemoveWhenScavenging=\"1000\"
backingStoreName=\"NullBackingStore\" />
</cacheManagers>
<backingStores>
<add type=\"Microsoft.Practices.EnterpriseLibrary.Caching.BackingStoreImplementations.NullBackingStore,PublicKeyToken=31bf3856ad364e35\"
name=\"NullBackingStore\" />
</backingStores>
</cachingConfiguration>
</configuration>
System.Web.Caching