ASP.NET MVC & Web API项目中集成MEF

1.实现方式

//WebApi需要实现的接口
System.Web.Http.Dependencies.IDependencyResolver
//MVC需要实现的接口
System.Web.Mvc.IDependencyResolver

2.实现代码

我们写一个通用的类，同时实现这两个接口

public class MefDependencySolver : System.Web.Http.Dependencies.IDependencyResolver, System.Web.Mvc.IDependencyResolver
{
   //实现接口方法
}

3.全局配置

var catalog = new DirectoryCatalog(AppDomain.CurrentDomain.SetupInformation.PrivateBinPath);
var resolver = new MefDependencyResolver(catalog);
// Install MEF dependency resolver for MVC
DependencyResolver.SetResolver(resolver);
// Install MEF dependency resolver for Web API
System.Web.Http.GlobalConfiguration.Configuration.DependencyResolver = resolver;

参考地址：

http://blog.csdn.net/allenwdj/article/details/50509340

http://stackoverflow.com/questions/13566688/how-to-integrate-mef-with-asp-net-mvc-4-and-asp-net-web-api