SignalR is an “async signaling library for .NET to help build real-time, multi-user interactive web applications”.
And its very cool. A minimal example…
Add the “SignalR” NuGet package to a web application:
Install-Package SignalR
The HTML:
<html>
<head>
</head>
<body>
<script src="../Scripts/jquery-1.6.4.js"></script>
<script src="../Scripts/jquery.signalR.js"></script>
<script src="../signalr/hubs"></script>
<form id="form1" runat="server">
<div>
<script type="text/javascript">
var chat;
$(function () {
// Created proxy
chat = $.connection.myChat;
// Assign a function to be called by the server
chat.addMessage = onAddMessage;
// Register a function with the button click
$("#broadcast").click(onBroadcast);
// Start the connection
$.connection.hub.start();
});
function onAddMessage(message) {
// Add the message to the list
$('#messages').append('<li>' + message + '</li>');
}
function onBroadcast() {
// Call the chat method on the server
chat.send($('#message').val());
}
</script>
<input type="text" id="message" />
<input type="button" id="broadcast" />
<ul id="messages"></ul>
</div>
</form>
</body>
</html>
The code (C#):
using SignalR.Hubs;
public class MyChat : Hub
{
public void Send(string message)
{
// Call the addMessage method on all clients
Clients.addMessage(message);
}
}
And that is it.
Now you have a real-time chat/message application. View the page in multiple browsers and see all the client receive all the messages in real-time.
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