从控制器的操作中调用集线器方法 [英] Call a hub method from a controller's action

问题描述

如何从控制器的操作中调用集线器方法?这样做的正确方法是什么?

有人在帖子中使用过这个:

DefaultHubManager hd = new DefaultHubManager(GlobalHost.DependencyResolver);var hub = hd.ResolveHub("AdminHub") as AdminHub;hub.SendMessage("woohoo");

但对我来说，那就是投掷:

<块引用>

不支持使用不是由 HubPipeline 创建的 Hub 实例.

我还读到您可以创建一个集线器上下文，但我不想将责任赋予该操作，即该操作执行以下操作:

hubContext.Client(...).someJsMethod(..)

解决方案

正确的方法是实际创建集线器上下文.如何以及在何处执行此操作取决于您，这里有两种方法:

1. 在您的集线器中创建一个静态方法(不必在您的集线器中，实际上可以在任何地方)然后您可以通过 AdminHub.SendMessage("wooo") 调用它代码>

   <块引用>

   public static void SendMessage(string msg){var hubContext = GlobalHost.ConnectionManager.GetHubContext();hubContext.Clients.All.foo(msg);}

2. 完全避免静态方法，直接发送到集线器客户端

   <块引用>

    var hubContext = GlobalHost.ConnectionManager.GetHubContext();hubContext.Clients.All.foo(msg);

How can I call a hub method from a controller's action? What is the correct way of doing this?

Someone used this in a post:

DefaultHubManager hd = new DefaultHubManager(GlobalHost.DependencyResolver);
var hub = hd.ResolveHub("AdminHub") as AdminHub;
hub.SendMessage("woohoo");

But for me, that is throwing:

Using a Hub instance not created by the HubPipeline is unsupported.

I've read also that you can create a hub context, but I don't want to give the responsability to the action, that is, the action doing stuff like:

hubContext.Client(...).someJsMethod(..)

解决方案

The correct way is to actually create the hub context. How and where you do that is up to you, here are two approachs:

1. Create a static method in your hub (doesn't have to be in your hub, could actually be anywhere) and then you can just call it via AdminHub.SendMessage("wooo")

   public static void SendMessage(string msg)
   {
       var hubContext = GlobalHost.ConnectionManager.GetHubContext<AdminHub>();
       hubContext.Clients.All.foo(msg);
   }
   

2. Avoid the static method all together and just send directly to the hubs clients

       var hubContext = GlobalHost.ConnectionManager.GetHubContext<AdminHub>();
       hubContext.Clients.All.foo(msg);
   

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