WebApi Autofac依赖注入配置

public class AutofacConfig
   {
       /// <summary>
       /// IOC注册
       /// </summary>
       public static void Register()
       {
           ContainerBuilder builder = new ContainerBuilder();
           builder.RegisterApiControllers(Assembly.GetExecutingAssembly());
 
           //批量注册程序集
           var serviceDll = BuildManager.GetReferencedAssemblies().Cast<Assembly>().Where(ab => ab.GetName().Name.EndsWith("Service")).ToArray();
           builder.RegisterAssemblyTypes(serviceDll).AsImplementedInterfaces().SingleInstance();
           IContainer container = builder.Build();
           GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(container);
 
           //帮助类注入
           AutofacHelper.RegisterContainer(container);
       }
   }

/// <summary>
/// 依赖注入帮助类
/// </summary>
public class AutofacHelper
{
    private static IContainer _container;
 
    ///<summary>
    ///注册DIContainer
    ///</summary>
    ///<param name="container">Autofac.IContainer</param>
    ///
    public static void RegisterContainer(IContainer container)
    {
        _container = container;
    }
 
    ///<summary>
    ///获取服务(Single)
    ///</summary>
    ///<typeparam name="TService">组件类型</typeparam>
    ///<returns>返回获取的组件</returns>
    ///
    public static TService Resolve<TService>()
    {
        using (ILifetimeScope scope = _container.BeginLifetimeScope())
        {
            return ResolutionExtensions.Resolve<TService>(scope);
        }
    }
}