缺少对Microsoft.scripting.ExtensionAttrribute.dll的引用

Question

我们在我们的.net 4 web表单网站上间歇性地收到此错误。回收应用程序池似乎通常可以解决它。

我能找到的唯一参考似乎与使用Umbraco或动态语言运行时相关。这两者都不适用于我们。

我发现的唯一有用的链接是这样的：http://support.frozenmountain.com/entries/23667761-Compatibility-issue-using-ASP-Net-4-0-Extensions-and-ScriptManager

任何其他解决方案，不是添加unnecesary参考其他？

System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Scripting.ExtensionAttribute, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. File name: 'Microsoft.Scripting.ExtensionAttribute, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null'  at System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type)  at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)  at System.ModuleHandle.ResolveTypeHandle(Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)  at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)  at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg)  at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent)  at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean isDecoratedTargetSecurityTransparent)  at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)  at System.Web.UI.AssemblyCache.GetAjaxFrameworkAssemblyAttribute(Assembly assembly)  at System.Web.UI.ScriptManager.get_DefaultAjaxFrameworkAssembly()  at System.Web.UI.ScriptManager..ctor()  at ASP.masterpages_safarinow_master.__BuildControlMasterScriptManager()  at ASP.masterpages_safarinow_master.__BuildControlfrmMain()  at ASP.masterpages_safarinow_master.__BuildControlmasterBodyTag()  at ASP.masterpages_safarinow_master.__BuildControlTree(masterpages_safarinow_master __ctrl)  at System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection)  at System.Web.UI.Page.ApplyMasterPage()  at System.Web.UI.Page.PerformPreInit()  at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].  at System.Web.UI.Page.HandleError(Exception e)  at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)  at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)  at System.Web.UI.Page.ProcessRequest()  at System.Web.UI.Page.ProcessRequest(HttpContext context)  at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()  at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) 

Answer 1

虽然你说过你没有使用DLR，但这是该文件存在的唯一位置。该错误消息强烈表明您正在使用为.NET 2.0-3.5构建的旧版IronPython（或IronRuby或其他基于DLR的东西）。某处存在名称类似“Microsoft.Dynamic.dll”，“Microsoft.Scripting.Core.dll”和“Microsoft.Scripting.dll”的文件。无论使用什么，都应该使用专门为.NET 4.0构建的DLR版本进行更新。