C# 从服务器向所有客户端发送信号消息
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Send signalr message from server to all clients
提问by Matt Roberts
This is related to SignalR + posting a message to a Hub via an action method, but my question is a bit different:
这与SignalR + 通过操作方法向集线器发布消息有关，但我的问题有点不同：
I'm on version 0.5.2 of signalr, using hubs. In older versions, you were encouraged to create methods on the hub to send messages to all clients, which is what I have:
我使用的是 0.5.2 版本的信号器，使用集线器。在旧版本中，我们鼓励您在集线器上创建方法来向所有客户端发送消息，这就是我所拥有的：
public class MyHub : Hub
{
public void SendMessage(string message)
{
// Any other logic here
Clients.messageRecieved(message);
}
...
}
So in 0.5.2, I want to send a message to all the clients (say from somewhere in the controller). How can I get access to the MyHubinstance?
所以在 0.5.2 中，我想向所有客户端发送一条消息（比如从控制器中的某个地方）。如何访问MyHub实例？
The only way I've seen referenced is:
我看到引用的唯一方法是：
var hubContext = GlobalHost.ConnectionManager.GetHubContext<MyHub>();
hubContext.Clients.messageRecieved("hello");
Which is fine, but I want to call the method on my hub.
这很好，但我想在我的集线器上调用该方法。
采纳答案by Paul
You can do this by using a static method:
您可以使用静态方法执行此操作：
SignalR v.04-
SignalR v.04-
public class MyHub : Hub
{
internal static void SendMessage(string message)
{
var connectionManager = (IConnectionManager)AspNetHost.DependencyResolver.GetService(typeof(IConnectionManager));
dynamic allClients = connectionManager.GetClients<MyHub>();
allClients.messageRecieved(message);
}
...
}
SignalR 0.5+
信号R 0.5+
public class MyHub : Hub
{
internal static void SendMessage(string message)
{
IHubContext context = GlobalHost.ConnectionManager.GetHubContext<MyHub>();
context.Clients.messageRecieved(message);
}
...
}
You can then call this like so:
然后你可以这样调用它：
MyHub.SendMessage("The Message!");
Good article on the SignalR API: http://weblogs.asp.net/davidfowler/archive/2012/05/04/api-improvements-made-in-signalr-0-5.aspx
关于 SignalR API 的好文章：http://weblogs.asp.net/davidfowler/archive/2012/05/04/api-improvements-made-in-signalr-0-5.aspx
Provided by Paolo Morettiin comments
由 Paolo Moretti在评论中提供
回答by formatc
I had same problem, in my example addNotification is client-side method:
我有同样的问题，在我的例子中 addNotification 是客户端方法：
var hubContext = GlobalHost.ConnectionManager.GetHubContext<SignalR.NotificationsHub>();
hubContext.Clients.addNotification("Text here");
On you client side you can add code to call your hub method in addNotification:
在您的客户端，您可以添加代码以在 addNotification 中调用您的集线器方法：
var notification = $.connection.notificationHub;
notification.addNotification = function (message) {
notification.addServerNotification(message); // Server Side method
}
$.connection.hub.start();
Hub:
中心：
[HubName("notificationHub")]
public class NotificationsHub : Hub
{
public void addServerNotification(string message)
{
//do your thing
}
}
UPDATE: Reading your question over and over agian I really don't find a reason to do that. Hub methods are usually there to be called from client side, or I misunderstood you, anyway here is an update. If you want to do a server side thing and then notify clients.
更新：一遍又一遍地阅读你的问题，我真的找不到这样做的理由。集线器方法通常是从客户端调用的，否则我误解了你，无论如何这里有一个更新。如果你想做服务器端的事情，然后通知客户端。
[HttpPost]
[Authorize]
public ActionResult Add(Item item)
{
MyHubMethodCopy(item);
var hubContext = GlobalHost.ConnectionManager.GetHubContext<SignalR.NotificationsHub>();
hubContext.Clients.addNotification("Items were added");
}
private void MyHubMethodCopy(Item item)
{
itemService.AddItem(item);
}
