How to configure Autofac and SignalR in a MVC 5 application

Question

I am trying to configure an MVC 5 application to use SignalR 2.2.x and inject a service into my NotificationsHub. We are using Autofac for MVC but I am not sure

Answer 1

Install nuget package Autofac.SignalR, for example:

Register your hubs

// during creation of the IContainer, register signalr hubs automatically
var executingAssembly = Assembly.GetExecutingAssembly();
builder.RegisterHubs(executingAssembly);

// alternatively register hubs individually
// ExternallyOwned() ensures SignalR is allowed to control disposal of the hubs rather than Autofac.
builder.RegisterType().ExternallyOwned();

Set signalr service locator

// replace the Signalr dependency resolver once your IContainer 'container' is ready
GlobalHost.DependencyResolver = new AutofacDependencyResolver(container);

// or this can alternatively be set in the HubConfiguration instance when using OWIN IAppBuilder map.RunSignalR(hubConfiguration);
var hubConfiguration = new HubConfiguration
{
    Resolver = new AutofacDependencyResolver(container),
    //...
}

For more information:

https://autofaccn.readthedocs.io/en/latest/integration/signalr.html

https://docs.microsoft.com/en-us/aspnet/signalr/overview/advanced/dependency-injection