asp.net-mvc – Asp.net mvc 4部署错误

无法加载文件或程序集

‘System.Web.Http,Version=4.0.0.0,Culture=neutral,
PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The
module was expected to contain an assembly manifest.

我尝试了以下解决方案：

>将dll文件从本地驱动器复制到bin文件夹
>检查我的主机是否启用了asp.net 4
>检查了web.config文件是否配置正确.

这是确切的屏幕跟踪.请注意,最后一行显示.net版本4以及asp.net版本4所以我认为它不是问题.请指导我.

Could not load file or assembly 'System.Web.Http,PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The module was expected to contain an assembly manifest.

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.BadImageFormatException: Could not load file or assembly 'System.Web.Http,PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The module was expected to contain an assembly manifest.

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 'System.Web.Http,PublicKeyToken=31bf3856ad364e35' could not be loaded.


WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging,set the registry value [HKLMSoftwareMicrosoftFusion!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 [HKLMSoftwareMicrosoftFusion!EnableLog].

Stack Trace: 


[BadImageFormatException: Could not load file or assembly 'System.Web.Http,PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The module was expected to contain an assembly manifest.]
   innovationtimes.MvcApplication.Application_Start() +0

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

这是整个web.config文件

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application,please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <appSettings>
    <add key="webpages:Version" value="2.0.0.0"/>
    <add key="webpages:Enabled" value="false"/>
    <add key="PreserveLoginUrl" value="true"/>
    <add key="ClientValidationEnabled" value="true"/>
    <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
  </appSettings>
  <connectionStrings>
    <!--<add name="DataContext" providerName="System.Data.SqlClient" connectionString="Data Source=pc1SQLEXPRESS;Initial Catalog=itdb;User Id=sa;Password=12345;"/>-->

  </connectionStrings>
  <system.web>
    <customErrors mode="Off"></customErrors>
    <compilation debug="true" targetFramework="4.0"/>
    <pages>
      <namespaces>
        <add namespace="System.Web.Helpers"/>
        <add namespace="System.Web.Mvc"/>
        <add namespace="System.Web.Mvc.Ajax"/>
        <add namespace="System.Web.Mvc.Html"/>
        <add namespace="System.Web.Routing"/>
        <add namespace="System.Web.WebPages"/>
      </namespaces>
    </pages>
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules runAllManagedModulesForAllRequests="true"/>
    <handlers>
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit"/>
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit"/>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%Microsoft.NETFrameworkv4.0.30319aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0"/>
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%Microsoft.NETFramework64v4.0.30319aspnet_isapi.dll" preCondition="classicMode,bitness64" responseBufferLimit="0"/>
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0"/>
    </handlers>
  </system.webServer>
</configuration>