Unity Container resolve with dynamic parameters

Question

I have a situation where I would like to resolve a class with a dynamic constructor parameter in my ASP.NET 4, MVC web application. I am using Unity v4.0.1. I need the value that is passed to the constructor of the service on Resolve to be be different for each request as shown below.

var obj = new MyObject();
container.RegisterType<IMyService, MyService>(
          new PerRequestLifetimeManager(), 
          new InjectionConstructor(obj));

How do I achieve this?

score 2 · Answer 1 · edited May 23 '17 at 10:29

I was able to achieve it as below by taking help from here.

Register my type as

container.RegisterType<IMyService, MyService>(new PerRequestLifetimeManager());

In my Global.asax.cs

protected void Application_BeginRequest()
{
    var obj = new MyObject();

    container
        .Resolve<IMyService>(
            new ParameterOverrides
              {
                  {"obj", obj},
              }.OnType<MyService>()
        );
}

Make sure to have the constructor of MyService as

public MyService(MyObject obj){
    //do something here
}

Unity Container resolve with dynamic parameters

1 Answers1