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社区首页 >问答首页 >无法加载文件或程序集“System.Net.Http”

问无法加载文件或程序集“System.Net.Http”
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Stack Overflow用户
提问于 2017-08-02 10:04:38
回答 1查看 23.4K关注 0票数 27

1.启动应用程序时出错

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Could not load file or assembly 'System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

Stack Trace: 


[FileNotFoundException: Could not load file or assembly 'System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.]
   System.Web.Http.GlobalConfiguration..cctor() +0

[TypeInitializationException: The type initializer for 'System.Web.Http.GlobalConfiguration' threw an exception.]
   System.Web.Http.GlobalConfiguration.get_Configuration() +14
   SerilogWeb.Classic.WebApi.PreApplicationStartModule.Register() +10

[InvalidOperationException: The pre-application start initialization method Register on type SerilogWeb.Classic.WebApi.PreApplicationStartModule threw an exception with the following error message: The type initializer for 'System.Web.Http.GlobalConfiguration' threw an exception..]
   System.Web.Compilation.BuildManager.InvokePreStartInitMethodsCore(ICollection`1 methods, Func`1 setHostingEnvironmentCultures) +614
   System.Web.Compilation.BuildManager.InvokePreStartInitMethods(ICollection`1 methods) +138
   System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded) +164
   System.Web.Compilation.BuildManager.ExecutePreAppStart() +156
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +695

[HttpException (0x80004005): The pre-application start initialization method Register on type SerilogWeb.Classic.WebApi.PreApplicationStartModule threw an exception with the following error message: The type initializer for 'System.Web.Http.GlobalConfiguration' threw an exception..]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +658
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +89
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +190

2. Csproj

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...
  <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
...
  <Reference Include="System.Net.Http" />
...

当我在解决方案中显示System.Net.Http属性时，它具有：

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Aliases = global
CopyLocal = False
Path = C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\System.Net.Http.dll
Resolved = True
Runtime Version = v4.0.30319
Specific Version = True
Strong Name = True
Version = 4.0.0.0

3. Fusionlog

启动此应用程序时，有两个日志，分别为v4.0.0.0和v.4.1.1.1。这是问题吗？

v4.0.0.0

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*** Assembly Binder Log Entry  (x) ***

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  C:\Program Files (x86)\IIS Express\iisexpress.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: DisplayName = System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
 (Fully-specified)
LOG: Appbase = x
LOG: Initial PrivatePath = x\bin
LOG: Dynamic Base = C:\Users\y\AppData\Local\Temp\Temporary ASP.NET Files\vs\xyz
LOG: Cache Base = C:\Users\y\AppData\Local\Temp\Temporary ASP.NET Files\vs\xyz
LOG: AppName = 12345
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: x\web.config
LOG: Using host configuration file: w\Documents\IISExpress\config\aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: GAC Lookup was unsuccessful.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http/System.Net.Http.EXE.
LOG: All probing URLs attempted and failed.

4.1.1.0版

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*** Assembly Binder Log Entry  (x) ***

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  C:\Program Files (x86)\IIS Express\iisexpress.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: DisplayName = System.Net.Http, Version=4.1.1.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL
 (Fully-specified)
LOG: Appbase = file:///C:/x/
LOG: Initial PrivatePath = C:\x\bin
LOG: Dynamic Base = C:\Users\y\AppData\Local\Temp\Temporary ASP.NET Files\vs\xyz
LOG: Cache Base = C:\Users\y\AppData\Local\Temp\Temporary ASP.NET Files\vs\xyz
LOG: AppName = 12345
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\x\web.config
LOG: Using host configuration file: w\Documents\IISExpress\config\aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Redirect found in application configuration file: 4.1.1.1 redirected to 4.1.1.1.
LOG: ProcessorArchitecture is locked to MSIL.
LOG: Post-policy reference: System.Net.Http, Version=4.1.1.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL
LOG: GAC Lookup was unsuccessful.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http/System.Net.Http.DLL.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/Users/y/AppData/Local/Temp/Temporary ASP.NET Files/vs/xyz/12345/System.Net.Http/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http.EXE.
LOG: Attempting download of new URL file:///C:/x/bin/System.Net.Http/System.Net.Http.EXE.
LOG: All probing URLs attempted and failed.

4. GAC

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$ gacutil -l

...
System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL
...

System.Net.Http.dll在C:\Windows\Microsoft.NET\assembly...吗？

  • GAC_32 -否
  • GAC_64 -否
  • GAC_MSIL -是的

5.这是程序集第一位置

C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Net.Http\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Net.Http.dll

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System.Net.Http.dll 197 kB (file version: 4.7.2046.0)

装配检查：

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$ sn.exe -T "C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Net.Http\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Net.Http.dll"

Microsoft (R) .NET Framework Strong Name Utility  Version 4.0.30319.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Public key token is b03f5f7f11d50a3a

6.这是程序集第二位置

C：\程序文件(x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.6.1\System.Net.Http.dll

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System.Net.Http.dll 84 kB (file version: 4.6.1055.0)

装配检查：

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$ sn.exe -T "C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\System.Net.Http.dll"

Microsoft (R) .NET Framework Strong Name Utility  Version 4.0.30319.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Public key token is b03f5f7f11d50a3a

我想我掌握了所有的信息，但我想不出解决办法。我可能会用GAC或周围的方式替换.NETFramework程序集，但这是盲目的--我不知道原因是什么。

//更新

Web.config

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<?xml version="1.0" encoding="utf-8"?>
<configuration>

  <system.web>
    <compilation debug="true" targetFramework="4.6.1" />
    <httpRuntime targetFramework="4.6.1" />
  </system.web>

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
...
      <dependentAssembly>
        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.1.1.1" newVersion="4.1.1.1" />
      </dependentAssembly>
...
    </assemblyBinding>
  </runtime>


</configuration>
.net
visual-studio
gac
c#
asp.net
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2017-08-04 13:55:45

感谢@Jehof：

原因

Web.config将System.Net.Http从4.0.0重定向到4.1.1，而GAC只有组装版本4.0.0。

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<?xml version="1.0" encoding="utf-8"?>
<configuration>

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
...
      <dependentAssembly>
        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.1.1.1" newVersion="4.1.1.1" />
      </dependentAssembly>
...
    </assemblyBinding>
  </runtime>


</configuration>

溶液

移除这个重定向解决了问题。

根源

我想，我在Web.config中重定向了这个程序集，因为我在某个时候通过nuget安装了System.Net.Http，然后卸载它。但是，程序集重定向不会自动删除。

票数 39
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页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/45457740

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