need signalR polling for asp.net mvc - html

Question

Any kind soul can guide me how to use signalR on an existing mvc project to poll data in real time i'd be greatly appreciate.
example code:
[controller]
private ApplicationDbContext db = new ApplicationDbContext();
public PartialViewResult Chat(string people) // <---need to send real time data to partial
{
var model = new MessageVM()
{
sender = User.Identity.Name;,
messageList = db.messages.Where(x => x.receiver == people).ToList().Take(30)
};
return PartialView("_chat", model);
}
[view]
#Ajax.ActionLink(item.name, "Chat", new { people = item.name }, new AjaxOptions()
{ HttpMethod = "GET", UpdateTargetId = "divChat", InsertionMode = InsertionMode.Replace })
<div id="divChat"></div> // <---this area need real-time messages data from controller.

Answer 1

First create your signalr connection in js in client side. something like:
function signalrconnection() {
$.connection.hub.url = "http://localhost:54321/signalr";
chat = $.connection.myHub;
if (chat != undefined) {
$.connection.hub.start()
.done(function () {
chat.server.send("client", "Status\tasking for status");
chat = $.connection.myHub;
})
.fail(function () { NoLTConnectionAlert(); });
}
else {
///do something.
}
}
return chat;
}
Then add signalr call to your $(document).ready(function ()) in your js something like:
$(document).ready(function () {
chat = signalrconnection();
intervalstatus = setInterval(checkstatus, 1000);
// Create a function that the hub can call to broadcast messages.
chat.client.addMessage = function (name, message) {}
}
In your controller you should have a class for hub and method inside like:
public class MyHub : Hub
{
public void Send(string name, string message)
{
Clients.Caller.addMessage("parameter", reply);
}
}
Then again you should handle Clients.Caller.addMessage in you js to update <div id="divChat"></div>