Question

I am registering some types in Autofac using named parameters like this

 builder.Register<LogRequest>((c, p) =>
    {
        var param = p.Named<TenantConfigurations>("myparam");
        if (param is MyClass)
        {
            return new LogRequest(param as MyClass);
        }
        return null;
    });

How can i do the same for types that I register with builder.RegisterAssemblyTypes method. Assuming that all types constructor takes same parameter param

Update

This is what i ended up doing

Assembly.GetAssembly(CustomType)
                    .GetTypes()
                    .Where(t => t.IsSubclassOf(CustomType) && !t.IsAbstract)
                    .ToList().ForEach(t =>
                                        {
                                            builder.Register((c, p) =>
                                            {
                                                var param = p.Named<TenantConfigurations>("myparam");
                                                if (param is MyClass)
                                                {
                                                    return t.GetConstructor(new Type[] { typeof(TenantConfigurations) }).Invoke(new object[] { config });
                                                }
                                            });
                                        });

Answer 1

Yes, you can easily do that using “WithParameter” extension. Example:

builder.RegisterAssemblyTypes(assembly).WithParameter("param", "value");

Update:

Also, you can do that by using “LifetimeEvents”. Simple usage example:

builder.RegisterAssemblyTypes(assembly).OnActivating(args =>
{
    var param = args.Parameters.Named<string>("param");
    args.ReplaceInstance(new HelloWorld(param));
});