c# - Autofac 无法解析外部 Controller 上的属性

Question

我有两个项目:一个标准 Web Api 项目和一个包含所有 Controller 的类库项目。在 Web Api 中，我在 Global.asax 类上有以下内容:

public class MvcApplication : HttpApplication
{
    protected void Application_Start()
    {
        WebApiConfig.Register(GlobalConfiguration.Configuration);

        RouteConfig.RegisterRoutes(RouteTable.Routes);

        var builder = new ContainerBuilder();

        builder.RegisterApiControllers(GetAssemblies(true)).PropertiesAutowired();
        builder
            .RegisterAssemblyTypes(GetAssemblies(false))             
            .Where(t => t.GetCustomAttributes(typeof(IocContainerMarkerAttribute), false).Any())
            .PropertiesAutowired();

        GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(builder.Build());
    }

    private static Assembly[] GetAssemblies(bool isController)
    {
        var path = HttpContext.Current.Server.MapPath("~/Bin");

        return isController
            ? Directory.GetFiles(path, "*.dll") .Where(x => x.Contains(".Controllers")).Select(Assembly.LoadFile).ToArray()
            : Directory.GetFiles(path, "*.dll").Select(Assembly.LoadFile).ToArray();
    }
}

Controller :

public class PropertyAgentController : ApiController
{
    public ICommandControllerProcessor CommandControllerProcessor { get; set; }


    [HttpPost]
    public HttpResponseMessage HandleMessage()
    {
        return CommandControllerProcessor.HandleMessage(this);
    }
}

和依赖关系:

public interface ICommandControllerProcessor
{
    HttpResponseMessage HandleMessage(ApiController controller);
}

[IocContainerMarker]
public class CommandControllerProcessor : ICommandControllerProcessor
{
    public virtual HttpResponseMessage HandleMessage(ApiController controller)
    {
        return null;
    }
}

CommandControllerProcessor 类位于 Web api 项目中。当我在同一个项目中拥有 Controller 时，该属性正在解析，但一旦我创建了不同的项目，仍然会发现 Controller ，但该属性未连接。

有什么想法可能是什么问题吗？

非常感谢。

Answer 1

我按照 nemesv 给我的提示进行操作并使其正常工作。基本上缺少了一些东西，但注册覆盖和 LoadFile 的使用绝对是一个问题。

    protected void Application_Start()
    {
        WebApiConfig.Register(GlobalConfiguration.Configuration);

        RouteConfig.RegisterRoutes(RouteTable.Routes);

        var builder = new ContainerBuilder();

        builder.RegisterApiControllers(GetAssemblies(true)).PropertiesAutowired();

        builder
            .RegisterAssemblyTypes(GetAssemblies(false))             
            .Where(t => t.GetCustomAttributes(typeof(IocContainerMarkerAttribute), false).Any())
            .AsImplementedInterfaces()
            .PropertiesAutowired();

        GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(builder.Build());
    }

    private static Assembly[] GetAssemblies(bool isController)
    {
        var path = HttpContext.Current.Server.MapPath("~/Bin");

        return isController
            ? Directory.GetFiles(path, "*.dll").Where(x => x.Contains(".Controllers")).Select(Assembly.LoadFrom).ToArray()
            : Directory.GetFiles(path, "*.dll").Where(x => !x.Contains(".Controllers")).Select(Assembly.LoadFrom).ToArray();
    }