webapi中的扩展点

Extension Points

Web API provides extension points for some parts of the routing process.

Interface	Description
IHttpControllerSelector	Selects the controller.
IHttpControllerTypeResolver	Gets the list of controller types. The DefaultHttpControllerSelector chooses the controller type from this list.
IAssembliesResolver	Gets the list of project assemblies. The IHttpControllerTypeResolver interface uses this list to find the controller types.
IHttpControllerActivator	Creates new controller instances.
IHttpActionSelector	Selects the action.
IHttpActionInvoker	Invokes the action.

To provide your own implementation for any of these interfaces, use the Services collection on the HttpConfiguration object:

var config = GlobalConfiguration.Configuration;
config.Services.Replace(typeof(IHttpControllerSelector), new MyControllerSelector(config));