CODEWITHSUNDEEP
c#dependency-injectionautofac
TugboatCaptain
TugboatCaptain

Reputation: 4328

Resolving or injecting dependency in global.asax using autofac

I need to execute some one-time code on start of my application in the global.asax. I've already got autofac up and running with numerous registrations but the problem is that I can't figure out how to resolve or inject a dependency into SecurityConfig.RegisterActivities() that's inside my global.asax.

I tried manually resolving the dependency myself in global.asax using the autofac container but it threw the exception "No scope with a Tag matching 'AutofacWebRequest' is visible from the scope in which the instance was requested."

How do I get this dependency into that class?

protected void Application_Start()
{
        var builder = new ContainerBuilder();
        DependencyRegistrar dr = new DependencyRegistrar();
        dr.Register(builder);

        new SecurityConfig().RegisterActivities(); // this needs injecting into or resolving of IServiceManager instance
}

public class DependencyRegistrar
{
    public virtual IContainer Register(ContainerBuilder builder)
    {
        builder.RegisterType<ServiceManager>().As<IServiceManager>().InstancePerHttpRequest();
        builder.RegisterType<SecurityConfig>().AsSelf().PropertiesAutowired().InstancePerDependency();
    }
}

public class SecurityConfig
{
    public void RegisterActivities()
    {
        ServiceManager.DoSomething();
    }

    public IServiceManager ServiceManager { get; set; }
}

Upvotes: 4

Views: 6491

Answers (1)

TugboatCaptain
TugboatCaptain

Reputation: 4328

This allowed me to resolve my dependencies finally.

using(var scope = container.BeginLifetimeScope("AutofacWebRequest"))
{
    scope.Resolve<SecurityConfig>().RegisterActivities();
}

Upvotes: 2

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