SignalR 中的简单注入器注册问题

Question

我在我的控制器中设置了 DI，如下所示，并绑定到注册 IHubContext，如它在

上所见

控制器：

public class DemoController : Controller
{
    private IHubContext<DemoHub> context;

    public DemoController(IHubContext<DemoHub> context)
    {
        this.context = context;
    }
}

Global.asax:

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    RouteConfig.RegisterRoutes(RouteTable.Routes);
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    BundleConfig.RegisterBundles(BundleTable.Bundles);
    var container = new Container();
    container.Options.DefaultScopedLifestyle = new WebRequestLifestyle();



    container.Register<IHubContext, IHubContext>(Lifestyle.Scoped);

    // or 

    container.Register<IHubContext>(Lifestyle.Scoped);

    // code omitted
}

但是当我调试我的应用程序时，遇到“System.ArgumentException: 'The given type IHubContext is not a concrete type. Please use one of the other overloads to register this type. Parameter name: TImplementation'”错误。那么，如何正确注册 IHubContext 呢？

Answer 1

由于 ASP.NET MVC 没有为 SignalR 中心上下文内置依赖注入，您必须使用 GlobalHost.ConnectionManager 获取上下文实例。有了这个，您可以向创建 IHubContext 实例的容器注册依赖项。考虑到您输入了 hub

public class DemoHub : Hub<ITypedClient>
{
}

和界面

public interface ITypedClient
{
    void Test();
}

注册依赖如下

container.Register<IHubContext<ITypedClient>>(() =>
{
    return GlobalHost.ConnectionManager.GetHubContext<DemoHub, ITypedClient>();
}, Lifestyle.Scoped);

控制器应该看起来像

public class DemoController : Controller
{
    private IHubContext<ITypedClient> context;

    public DemoController(IHubContext<ITypedClient> context)
    {
        this.context = context;
    }
}

SignalR 中的简单注入器注册问题

Simple Injector registration problem in SignalR

c#

asp.net-mvc

dependency-injection

signalr

dependency-resolver