又学一招——依赖注入错误

 public static class IocContext
    {
        /// <summary>Unity容器</summary>
        private static Lazy<IUnityContainer> container = new Lazy<IUnityContainer>(() =>
        {
            var container = new UnityContainer();
            container.LoadConfiguration("container");
            return container;
        });
        /// <summary>Unity容器实例</summary>
        public static IUnityContainer Instance
        {
            get { return container.Value; }
        }
    }

[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(GTAPI.App_Start.UnityWebApiActivator),"Start")]


namespace GTAPI.App_Start
{
  /// <summary>Provides the bootstrapping for integrating Unity with WebApi when it is hosted in ASP.NET</summary>
  public static class UnityWebApiActivator
  {
    /// <summary>Integrates Unity when the application starts.</summary>
    public static void Start()
    {
      // Use UnityHierarchicalDependencyResolver if you want to use a new child container for each IHttpController resolution.
      // var resolver = new UnityHierarchicalDependencyResolver(UnityConfig.GetConfiguredContainer());
      var container = IocContext.Instance;
      var resolver = new UnityDependencyResolver(container);




      GlobalConfiguration.Configuration.DependencyResolver = resolver;
    }
  }
}

  <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <!-- 搜索别名注册 -->
    <!--  <assembly  name="Jurassic.Sooil.SearchService"/>-->
    <alias alias="ISearch" type="So.ISearch.ISearch,So.ISearch" />
    <alias alias="Search" type="So.Search.ESSearch,So.Search" />
    <alias alias="IQuery" type="So.ISearch.IQuery,So.ISearch" />
    <alias alias="Query" type="So.Search.MongoSearch,So.Search" />
    <container name="container">
      <!-- 搜索注册 -->
      <register type="ISearch" mapTo="Search">
        <lifetime type="transient"/>
      </register>
      <register type="IQuery" mapTo="Query">
        <lifetime type="transient"/>
      </register>
    </container>
  </unity>