简单注入器依赖项解析错误 - 无法加载文件或程序集 System.Web.Http

Question

我遵循洋葱架构并在 DependencyResolution 项目中使用 simple injector。这是我的架构：

1-Core
     - Domain Classes
     - Repository Interfaces
     - Service Interfaces
2-Infrastructure
     - Data
     - Dependency Resolution
     - Repository Interfaces Implementation
     - Service Interfaces Implementation
3-WebApi
     - Web Api Project
4-WebClient
     - My AngularJs App
5-Test
     - Test Project

StartUp.cs

public partial class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            // Here I am getting error at runtime.
            SimpleInjectorInitializer.Initialize(app);
            ConfigureAuth(app);
        }
    }

SimpleInjectorInitializer.Initialize

public static Container Initialize(IAppBuilder app)
        {
            var container = GetInitializeContainer(app);

            // This is an extension method from the integration package.
            container.RegisterWebApiControllers(GlobalConfiguration.Configuration);

            container.Verify();

            GlobalConfiguration.Configuration.DependencyResolver =
                new SimpleInjectorWebApiDependencyResolver(container);

            return container;
        }

在这里我添加了对从 WebApi 项目中获取的 System.Web, System.Web.Http, System.Web.Http.Host 的引用。

我将我的DependencyResolution项目的输出路径放到了WebApi bin中，并在web.config中设置了owinstart的值。

这是我遇到的错误：

An exception of type 'System.IO.FileLoadException' occurred in Infrastructure.DependencyResolution.dll but was not handled in user code

Additional information: Could not load file or assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

编辑：

这里是App.Config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
  </configSections>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Net.Http.Formatting" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

Answer 1

您可能在应用程序的配置文件中缺少绑定重定向。在大多数情况下，NuGet 包管理器会为您正确设置绑定重定向，但有时会失败。

您在配置文件中需要的绑定重定向如下所示：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" 
            culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-{version}" newVersion="{version}"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

请注意，您需要将 {version} 占位符替换为您引用的实际版本。

Answer 2

您确定您在整个项目中使用的 SimpleInjector 版本与您使用依赖注入的版本相同吗？我遇到了类似的错误，我注意到一个项目中使用了 SimpleInjectors 旧版本。在我通过 nuget 将 SimpleInjector 更新到新版本后，它开始工作了。

简单注入器依赖项解析错误 - 无法加载文件或程序集 System.Web.Http

Simple Injector Dependency Resolution Error - Could not load file or assembly System.Web.Http

.net

c#

dependency-injection

simple-injector

asp.net-web-api