SignalR cannot read property client of undefined

Question

I\'m trying to add SignalR to my project (ASPNET MVC 4). But I can\'t make it work.

In the below image you can see the error I\'m receiving.

Answer 1

For those who tried to add the generated proxy file path in the bundle.

Do not include the "~/signalr/hubs" in your BundleConfig.cs.

You can have the JQuery.SignalR in the bundle:

bundles.Add(new ScriptBundle("~/bundles/signalr").Include(
                  "~/Scripts/jquery.signalR-{version}.js"));

But you will need to add "/signalr/hubs" it in your view:

@section Scripts {
    @Scripts.Render("~/bundles/signalr")
    @Scripts.Render("/signalr/hubs")
}

I hope this helps.

Answer 2

In my case, I lost Microsoft.Owin.Host.SystemWeb.dll & Microsoft.Owin.Security.dll in my project. After adding References to them, that error was solved. it's working now.

Answer 3

Ok, I've found the issue, one thing I needed to do was:

These two references were missing:

Microsoft.AspNet.SignalR.Hosting.AspNet
Microsoft.AspNet.SignalR.Hosting.Common

Now, I included them getting nuget package: WebApiDoodle.SignalR which uses those two. My question is why those Dlls weren't added one I installed the Nuget Package: Microsoft.AspNet.SignalR -Pre?

Bug?

Then I had this in my global.asax.cs

using SignalR;

so

RouteTable.Routes.MapHubs();

was using that one, I needed to remove that using and use this one:

using Microsoft.AspNet.SignalR;

So the MapHubs use that one, and started to work.

Hope this helps others. Guillermo.

Answer 4

I had the same error message and resolved the issue by fixing a typo I had in the [HubName] attribute on the hub class - it was not exactly matching the property in the client-side javascript.

C# hub class:

[HubName("gameHub")]
public class GameHub : Hub
{

client-side javascript:

var foo = $.connection.gameHub;

"gameHub" must be the same.

hth

Answer 5

I fixed that problem by changing my js code from: var myHub = $.connection.SentimentsHub; to var myHub = $.connection.sentimentsHub;

So if you have some hub with class name TestHub you must use testHub(first letter is lowercase) name in js

Answer 6

For ASP.Net MVC folks:

Check your _Layout.cshtml: If you are calling the jquery bundle after the @RenderBody(), you will get this error.

Resoultion: Just move the @Scripts.Render("~/bundles/jquery") to the head section or write all signalr scripts in the scripts "section"