autofac--. Registration component--3 properties and method injection

Official Document: Http://docs.autofac.org/en/latest/register/prop-method-injection.html

AUTOFAC properties and Method injection

Although constructor parameter injection is the preferred method for passing values to a component, you can also use a property or method injection to provide a value.

Property injection is injected using a writable property instead of a constructor parameter. Method injection sets the dependency relationship by calling a method.

1. Attribute Injection

If it is a lambda expression component , use an object to initialize it:

New A {B = c.resolve<b> ()});

To support circular dependencies, use an activated event handler:

New A ()). OnActivated (e = e.instance.b = E.context.resolve<b> ());

If it is a reflection component , use propertiesautowired() to modify the registration property:

Builder. Registertype<a> (). Propertiesautowired ();

If you have a specific attribute and value that needs to be connected, you can use withproperty () to modify:

Builder. Registertype<a> (). Withproperty ("PropertyName", PropertyValue);

2. Method Injection

The simplest way to call a method to set the value of a component is to use a lambda expression component and the correct invocation to activate the processing method.

Builder. Register (c + =  {varnew  myobjecttype ()  ; var dep = c.resolve<thedependency>();  Result. Setthedependency (DEP);   return result;});

If you cannot register with a lambda expression, you can add an activation event handler (activating eventhandler)

Builder  . Register<MyObjectType>()  = {    var dep = e.context.resolve< Thedependency>();    E.instance.setthedependency (DEP);  });

autofac--. Registration component--3 properties and method injection