Setting up Autofac with Caliburn Micro v3.2.0 and Autofac v4.8.1

I find myself frequently setting up new projects with Caliburn Micro; however, It isn’t always easy to remember the code to integrate Autofac with the bootstrapper. So, here is the template that I use when creating a new application.

public class ClientBootstrapper : BootstrapperBase
{
    private static IContainer Container;

    public ClientBootstrapper()
    {
        this.Initialize();
    }

    protected override void Configure()
    {
        var builder = new ContainerBuilder();

        builder.RegisterType<WindowManager>()
            .AsImplementedInterfaces()
            .SingleInstance();

        builder.RegisterType<EventAggregator>()
            .AsImplementedInterfaces()
            .SingleInstance();
            
        Container = builder.Build();
    }

    protected override IEnumerable<object> GetAllInstances(Type service)
    {
        var type = typeof(IEnumerable<>).MakeGenericType(service);
        return Container.Resolve(type) as IEnumerable<object>;
    }

    protected override object GetInstance(Type service, string key)
    {
        if (string.IsNullOrWhiteSpace(key))
        {
            if (Container.IsRegistered(service))
                return Container.Resolve(service);
        }
        else
        {
            if(Container.IsRegisteredWithKey(key, service))
                return Container.ResolveKeyed(key, service);
        }

        var msgFormat = "Could not locate any instances of contract {0}.";
        var msg = string.Format(msgFormat, key ?? service.Name);
        throw new Exception(msg);
    }

    protected override void BuildUp(object instance)
    {
        Container.InjectProperties(instance);
    }
}

Hope this helps you out! Good luck with your WPF application.

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