SignalR +通过一个操作方法发布消息到集线器 [英] SignalR + posting a message to a Hub via an action method

问题描述

我使用SignalR的hub-功能（ https://github.com/SignalR/SignalR ）发布消息所有订阅的客户端：

I am using the hub- feature of SignalR (https://github.com/SignalR/SignalR) to publish messages to all subscribed clients:

public class NewsFeedHub : Hub
public void Send(string channel, string content)
{
    Clients[channel].addMessage(content);
}

这打电话时发送通过Javascript，但我也想在Web应用程序发布消息（从ASP.NET MVC操作方法内）工作正常。我已经尝试过实例化一个新的对象ob NewsFeedHub并调用发送方法，但这会导致一个错误（如集线器的潜在连接未设置）。有没有办法使用集线器没有连接的方法吗？

This works fine when calling "Send" via Javascript, but I would also like the web application to publish messages (from within an ASP.NET MVC action method). I already tried instantiating a new object ob NewsFeedHub and calling the Send method, but this results in an error (as the underlying "Connection" of the Hub is not set). Is there a way to use the Hub without a connection?

推荐答案

请注意，SignalR API已经更改多次因为这个问题被问。有机会的话，有些答案会变得过时。这并不意味着它们应该被向下投票，因为他们在写本新闻时是正确

有是该另一个更新的答案，如在的 SignalR维基

There is another updated answer for this, as seen in the SignalR Wiki

C＃

Public ActionResult MyControllerMethod()
{
    var context = GlobalHost.ConnectionManager.GetHubContext<MyHub>();
    context.Clients.All.methodInJavascript("hello world");
    // or
    context.Clients.Group("groupname").methodInJavascript("hello world");
}

vb.net

vb.net

Public Function MyControllerMethod() As ActionResult
    Dim context = GlobalHost.ConnectionManager.GetHubContext(Of MyHub)()
    context.Clients.All.methodInJavascript("hello world")
    '' or
    context.Clients.Group("groupname").methodInJavascript("hello world")
End Function

更新

这code已被更新。按照<一href=\"http://www.asp.net/signalr/overview/signalr-20/hubs-api/hubs-api-guide-server\">http://www.asp.net/signalr/overview/signalr-20/hubs-api/hubs-api-guide-server更改。

This code has been updated. Follow http://www.asp.net/signalr/overview/signalr-20/hubs-api/hubs-api-guide-server for changes.

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