Microsoft Unity, parameters in constructor

Question

I am using Unity with MVC and NHibernate. Unfortunately, our UnitOfWork resides in a different .dll and it doesn't have a default empty .ctor. This is what I do to register NHibernate:

var connectionString = ConfigurationManager.ConnectionStrings
    ["jobManagerConnection"].ConnectionString;
var assemblyMap = ConfigurationManager.AppSettings["assemblyMap"];
container.RegisterType<IUnitOfWork, UnitOfWork>(
    new ContainerControlledLifetimeManager());

In my WebController I have this:

/// <summary>Gets or sets UnitOfWork.</summary>
[Dependency]
public IUnitOfWork UnitOfWork { get; set; }

The problem is that the constructor of UnitOfWork expects 2 mandatory strings. How I can setup the RegisterType for this Interface in order to pass the two parameters retreived from the web.config? Is it possible?

Mark Seemann · Accepted Answer · 2010-04-08 12:40:52Z

4

Something like this should do it:

var connectionString = ConfigurationManager.ConnectionStrings
    ["jobManagerConnection"].ConnectionString;
var assemblyMap = ConfigurationManager.AppSettings["assemblyMap"];

container.RegisterType<IUnitOfWork, UnitOfWork>(
    new InjectionConstructor(connectionString, assemblyMap),
    new ContainerControlledLifetimeManager());

answered Apr 8, 2010 at 12:40

Mark Seemann

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2 Comments

Raffaeu Over a year ago

Yep, Mark you are right. I just posted a different way. Sorry but the docs in Unity still lack.

Chris Tavares Over a year ago

Mark's got it almost right - you need to put the lifetime manager first: container.RegisterInstance<IUnitOfWork, UnitOfWork>( new ContainerControlledLifetimeManager(), new InjectionConstructor(connectionString, assembyMap));

Raffaeu · Accepted Answer · 2010-04-08 12:42:41Z

1

Easier than I though:

        var connectionString = ConfigurationManager.ConnectionStrings["jobManagerConnection"].ConnectionString;
        var assemblyMap = ConfigurationManager.AppSettings["assemblyMap"];
        container
            .RegisterType<IUnitOfWork, UnitOfWork>(new ContainerControlledLifetimeManager())
            .Configure<InjectedMembers>()
            .ConfigureInjectionFor<UnitOfWork>(new InjectionConstructor(connectionString, assemblyMap));

answered Apr 8, 2010 at 12:42

Raffaeu

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1 Comment

Dave Over a year ago

I couldn't get Mark's syntax for the constructor parameters to work for some reason, but your lengthier implementation worked. Thanks!

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