I'm trying to create a server to client broadcast mechanism with SignalR and it doesnt seem to do anything.

I have a hub like this:

public class DataMessageService : Hub, IClientNotificationService
{
    dynamic _clients;

    public DataMessageService(IConnectionManager connectionManager)
    {
        _clients = connectionManager.GetClients<DataMessageService>();
    }

    public void SendDataChangeNotification(string entityName, string changeType, string id)
    {
        _clients.dataChangeNotification(new string[] {entityName, changeType, id});
    }
}

My _Layouts.cshtml has this:

var _centralHub;

$(function() {
    // startup the signalr hub and get the proxies we need
    _centralHub = $.connection.dataMessageService;
    $.connection.hub.start();
});

And I have some code in a partial which is loaded by a jquery tab using ajax:

_centralHub.dataChangeNotification = function (data) {
    alert(data[0] + "::" + data[1] + "::" + data[2]);
    if (data[0] == 'User') {
        grid.refresh();
    }
};

Now in the data layer, when some crud action occurs, I call DataMessageService.SendDataChangeNotification but nothing happens at the client end.

Am I missing something?

Update: I thought it might be something to do with the vs web server thingy but it also fails when using full IIS (on Win 7).

Another Update: I had confused my service with my hub. I'v'e now split these so it looks like the following, but it still doesnt work.

  public class DataMessageService : IClientNotificationService
  {
    public void SendDataChangeNotification(string entityName, string changeType, string id)
    {
      IConnectionManager icm = AspNetHost.DependencyResolver.Resolve<IConnectionManager>();
      dynamic clients = icm.GetClients<DataMessageHub>();      
      clients.dataChangeNotification(new string[] { entityName, changeType, id });
    }
  }

  public class DataMessageHub : Hub
  {
  }

:(

Even more info:

This works with FireFox but not with IE or Chrome.

I also tried to create a simple sample app and this worked fine with Chrome and IE.

Given that we don't have web sockets available to us, long polling may not be a good idea for our users/infrastructure. Maybe one day...

• model-view-controller
• signalr

A new instance of the hub is created every time it is resolved so you can't persist state like that.

You can get all clients in the hub from this.Clients.

To broadcast from outside of the hub class use this:

IConnectionManager connectionManager = AspNetHost.DependencyResolver.Resolve<IConnectionManager>();
dynamic clients = connectionManager.GetClients<DataMessageService>();
clients.dataChangeNotification(new string[] {entityName, changeType, id});