另一个无法加载文件或程序集'EntityFramework

Question

现在，我保证我已经使用了这个。堆栈溢出对此问题约有4或5种解决方案。尽管如此，他们似乎都没有工作。我在一个MVC 3项目中使用EntityFramework 5（4.4）。这在过去运行良好，但是自从我打开这个项目（大约20天左右）以来已经有一段时间了。我刚刚卸载&重新安装了Sql Server 2008 R2 Express。从那以后我重新启动。

在我所有的cshtml文件中，我的@model行上都出现了一个underlineline错误。当我将鼠标移到它上面时，我看到以下内容：

ASP.NET运行时错误：无法加载文件或程序集'EntityFramework，Version = 4.4.0.0，Culture = neutral，PublicTokenKey = b77a5c561934e089'或其某个依赖项。访问被拒绝。

我已经通过软件包管理器控制台卸载并重新安装了EntityFramework软件包。我也通过nuget完成了它。我已经关闭并重新开放了视觉工作室。我已经删除了该引用，并通过浏览该DLL手动添加了该引用。

这个我的web.config条目如下：

[open tag]section name="entityFramework" type="System.Data.Entity, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" [close tag]

任何一个有什么想法？

编辑1个FULL错误详细

Server Error in '/' Application. 

Could not load file or assembly 'EntityFramework' or one of its dependencies. Access is denied. 

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.IO.FileLoadException: Could not load file or assembly 'EntityFramework' or one of its dependencies. Access is denied. 

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. 

Assembly Load Trace: The following information can be helpful to determine why the assembly 'EntityFramework' could not be loaded. 


=== Pre-bind state information === 
LOG: User = Unknown 
LOG: DisplayName = EntityFramework 
(Partial) 
WRN: Partial binding information was supplied for an assembly: 
WRN: Assembly Name: EntityFramework | Domain ID: 2 
WRN: A partial bind occurs when only part of the assembly display name is provided. 
WRN: This might result in the binder loading an incorrect assembly. 
WRN: It is recommended to provide a fully specified textual identity for the assembly, 
WRN: that consists of the simple name, version, culture, and public key token. 
WRN: See whitepaper http://go.microsoft.com/fwlink/?LinkId=109270 for more information and common solutions to this issue. 
LOG: Appbase = file:///C:/MercurialProjects/ProxySetup/ProxySetup/ 
LOG: Initial PrivatePath = C:\MercurialProjects\ProxySetup\ProxySetup\bin 
Calling assembly : (Unknown). 
=== 
LOG: This bind starts in default load context. 
LOG: Using application configuration file: C:\MercurialProjects\ProxySetup\ProxySetup\web.config 
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config. 
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind). 
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/014aecc8/d1c2eaf7/EntityFramework.DLL. 
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/014aecc8/d1c2eaf7/EntityFramework/EntityFramework.DLL. 
LOG: Attempting download of new URL file:///C:/MercurialProjects/ProxySetup/ProxySetup/bin/EntityFramework.DLL. 
LOG: Using application configuration file: C:\MercurialProjects\ProxySetup\ProxySetup\web.config 
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config. 
LOG: Post-policy reference: EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 
ERR: Failed to complete setup of assembly (hr = 0x80070005). Probing terminated. 

Stack Trace: 


[FileLoadException: Could not load file or assembly 'EntityFramework' or one of its dependencies. Access is denied.] 

[FileLoadException: Could not load file or assembly 'EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Access is denied.] 
    System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0 
    System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +39 
    System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks) +132 
    System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +144 
    System.Reflection.Assembly.Load(String assemblyString) +28 
    System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +46 

[ConfigurationErrorsException: Could not load file or assembly 'EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Access is denied.] 
    System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +618 
    System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +209 
    System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +130 
    System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +178 
    System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +94 
    System.Web.Compilation.BuildManager.CallPreStartInitMethods() +332 
    System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +677 

[HttpException (0x80004005): Could not load file or assembly 'EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Access is denied.] 
    System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9090988 
    System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97 
    System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +258 

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

EDIT 2

每调试信息上面，我手动添加的所有DLL的应用程序使用到C：\ WINDOWS \微软。 NET \ Framework \ v4.0.30319 \ Temporary ASP.NET Files \ root \ 014aecc8 \ d1c2eaf7文件夹，因为这是最终引用的错误不断变化。

我没有看到ASPNET用户为C：\ Windows \ Microsoft.NET \ Framework \ v4.0.30319 \ Temporary ASP.NET Files \目录分配权限。我已经添加了：完全控制的IUSR，NETWORK，NETWORK SERVICE，IIS_USRS（\ IIS_ISURS）。我仍然收到错误。

由于我仍然遇到拒绝访问错误，我给了用户完全控制我的机器上的文件夹。应用程序加载。所以...这是一个权限错误。问题是，哪个帐户需要权限？

Answer 1

这似乎很奇怪，但在遇到这个问题以及类似的问题后，我发现了两个可能的原因，这些原因都超出了常规。 1）如果您使用的是chrome，请确保chrome在您尝试构建解决方案时关闭（我认为您无法构建解决方案，因为此错误？）。我知道这听起来很疯狂，但是我发现有时候，无论出于何种原因，当我在开发过程中使用chrome时，某些文件变得无法访问。我仍然不知道为什么，但如果您无法解决问题，那么值得一试。

2）在nuget包管理器中，如果您尚未重新安装实体框架，请将其卸载并重新安装。我发现，当我将应用程序从一台机器移动到另一台机器时，或者我从版本控制中更新它时，Nuget软件包会以某种方式混乱。重新安装似乎是唯一让它正常运行的事情。3）关于你的权限的具体问题，我不认为这是问题，但是，你整个应用程序文件夹和子文件夹/文件应该具有完全读/执行权限设置的用户“每个人”（但不写权限）。这应该是所有你需要的权限（至少这是我在安装过程中似乎需要的）。

祝你好运。

Answer 2

如果您的解决方案有多个项目，请确保您的edmx模型位于具有引用模型的代码的同一个项目中。

它可能会令人困惑，因为您可以在不同的项目中引用Model并且不会收到intellisense错误，即使在运行时出现错误也是如此。