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ファイルまたはアセンブリ「System.Net.Http」をロードできませんでした

1。アプリ起動時のエラー

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

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

ソリューションにSystem.Net.Httpプロパティを表示すると、次のようになります。

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

。Fusionlog

このアプリを起動すると、v4.0.0.0とv.4.1.1.1の2つのログがあります。これは問題ですか？

v4.0.0.0の場合

*** 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.

v4.1.1.0の場合

*** 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

$ gacutil -l

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

System.Net.Http.dll in C：\ Windows\Microsoft.NET\Assembly ...？

  • GAC_32-いいえ
  • GAC_64-いいえ
  • GAC_MSIL-はい

5。これはアセンブリの最初の場所です

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

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

組立チェック：

$ 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。これはアセンブリの2番目の場所です

C：\ Program Files（x86）\ Reference Assemblies\Microsoft\Framework.NETFramework\v4.6.1\System.Net.Http.dll

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

組立チェック：

$ 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

私はすべての情報を持っていると思いますが、解決策がわかりません。 .NETFramework AssemblyをGACまたはその周辺のアセンブリに置き換えることもできますが、それは盲目的です-理由はわかりません。

// UPDATE

Web.config

<?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>
c#asp.net.netvisual-studiogac
14
one_mile_run

@Jehofに感謝します。

理由

Web.configにはSystem.Net.Httpから4.0.0から4.1.1へのリダイレクトがあり、GACにはアセンブリバージョン4.0.0のみがありました。

<?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>

ソリューション

このリダイレクトを削除することで問題は解決しました。

根本原因

Web.configをある時点でnuget経由でインストールしてからアンインストールしたため、System.Net.Httpでこのアセンブリリダイレクトがあったと思います。ただし、アセンブリリダイレクトは自動的に削除されませんでした。

15
one_mile_run