Setter / property injection in Unity without attributes

Question

I am working on a project where the Unity framework is used as the IoC container. My question relates to injecting an optional dependency (in this case a logger) into severa

Answer 1

The following walkthrough shows one way of doing it through configuration. You can of course wire it through code as well. http://aardvarkblogs.wordpress.com/unity-container-tutorials/10-setter-injection/

Answer 2

You can inject your class with unity container.

for example if you have a class "MyClass" and you have dependency on two interface "IExample1" and "IExample2" and you don't want to define parameter for them in constructor , then follow below steps

Step 1. Register both the interfaces in unity container

IUnityContainer container = new UnityContainer();
container.RegisterType<IExample1,Impl1>();
container.RegisterType<IExample2,Impl2>();
//resolve class MyClass
var myClass = container.Resolve<MyClass>();

Step 2. Your class should look like this

public class MyClass
{
     IExample1 ex1;
     IExample2 ex2
     public MyClass(IUnityContainer container)
     {
        /* This unity container is same unity container that we used in step 
           1 to register and resolve classes. So you can use this container to resolve
           all the dependencies. */
       ex1= container.Resolve<IExample1>(); // will give you object of Impl1
       ex2= container.Resolve<IExample2>(); // will give you object of Impl2
     }
}

Step 3. In this way you can resolve any number of dependencies without defining them in constructor.