Bagaimana untuk Mendapat Kaedah Hab Teras SignalR daripada Pengawal Teras ASP.NET?

[Route("API/vardesigncomm")]
public class VarDesignCommController : Controller
{
    [HttpPut("ProcessVarDesignCommResponse/{id}")]
    public async Task<IActionResult> ProcessVarDesignCommResponse(int id)
    {
        await this.HubContext.Clients.All.InvokeAsync("Completed", id);
        return new JsonResult(true);
    }

    private IHubContext<VarDesignHub> HubContext
    { get; set; }
}

public interface ITypedHubClient
{
    Task TaskCompleted(int id);
}

public class VarDesignHub : Hub<ITypedHubClient>
{
    public Task TaskCompleted(int id) => Clients.All.InvokeAsync("Completed", id);
}

[Route("API/demo")]
public class DemoController : Controller
{
    private IHubContext<VarDesignHub, ITypedHubClient> _chatHubContext;

    public DemoController(IHubContext<VarDesignHub, ITypedHubClient> chatHubContext)
    {
        _chatHubContext = chatHubContext;
    }

    [HttpGet]
    public IActionResult TaskCompleted(int id)
    {
        _chatHubContext.Clients.All.TaskCompleted(id);
        return Ok();
    }
}