This article explains how to broadcast messages automatically using a timer without firing any event.
To know how to get started with SignalR, read my article Broadcast Message Using SignalR.
After installing SignalR and hub class, add a timer to the global file.
The following is the hub method:
public void SendMessage(String message)
{
// Call the addMessage methods on all clients
Clients.All.addMessage(message);
}
void Application_Start(object sender, EventArgs e)
{
var aTimer = new System.Timers.Timer(1000);
aTimer.Elapsed += aTimer_Elapsed;
aTimer.Interval = 3000;
aTimer.Enabled = true;
// Code that runs on application startup
// Register the default hubs route: ~/signalr
//RouteTable.Routes.MapHubs();
}
void aTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
var context = GlobalHost.ConnectionManager.GetHubContext<ChatHub>();
context.Clients.All.addMessage("This message broadcasted on " + DateTime.Now);
}
Client-side code
<script src="Scripts/jquery-1.6.4.min.js" type="text/javascript"></script>
<!--Reference the SignalR library. -->
<script src="Scripts/jquery.signalR-1.1.3.js" type="text/javascript"></script>
<!--Reference the autogenerated SignalR hub script. -->
<script src="signalr/hubs"></script>
<script type="text/javascript">
$(function () {
//Proxy created on the fly
var chat = $.connection.chatHub;
// Declare a function on the chat hub so the server can invoke it
chat.client.addMessage = function (message) {
$("#messages").append("<li>" + message + "</li>");
};
$("#broadcast").click(function () {
// call the chat method on the server
chat.server.sendMessage($("#msg").val());
});
$.connection.hub.start();
});
</script>
</head>
<body>
<!--<input type="text" id="msg" />-->
<!-- <input type="button" id="broadcast" value="broadcast" />-->
<ul id="messages" class="round">
</ul>
</body>
Output
![SignalR.jpg]()
As you can see, the message is broadcast every 3 seconds because I have used a timer time interval of 3 seconds.
var aTimer = new System.Timers.Timer(1000);
aTimer.Elapsed += aTimer_Elapsed;
aTimer.Interval = 3000;
aTimer.Enabled = true;