SimpleInjector与MVC4集成，与Web Api集成，以及通过属性注入演示

1，与MVC集成

见http://simpleinjector.codeplex.com/wikipage?title=Integration%20Guide&referringTitle=Home
我们自己建个MVC4项目测试

1.1 nuget

只需要安装Mvc的集成即可，其它的依赖会自动安装：

Install-Package SimpleInjector.Integration.Web.Mvc

1.2 Global.asax:

protected void Application_Start()

{

AreaRegistration.RegisterAllAreas();

GlobalConfiguration.Configure(WebApiConfig.Register);

FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

RouteConfig.RegisterRoutes(RouteTable.Routes);

BundleConfig.RegisterBundles(BundleTable.Bundles);

//按如下步骤添加

// 1. Create a new Simple Injector container

var container = new Container();

// 2. Configure the container (register)

//container.Register<IUserService, UserService>(Lifestyle.Transient);

//container.Register<IUserRepository, SqlUserRepository>(Lifestyle.Singleton);

//随便写个例子测试，名字就不计较了，Lifestyle的区别自行查文档

container.Register<Iaaa, aaa>(Lifestyle.Transient);

// 3. Optionally verify the container's configuration.

container.Verify();

// 4. Store the container for use by Page classes.

//WebApiApplication.Container = container;

System.Web.Mvc.DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));

// 5. register global filters //如果有注册全局过滤器的需要加此节点，和下面注释掉的方法

//RegisterGlobalFilters(GlobalFilters.Filters, container);

}

//public static void RegisterGlobalFilters(GlobalFilterCollection filters, Container container)

//{

//}

}

1.3 测试接口和方法的实现

public interface Iaaa

{

int a { get; set; }

string hello(string str);

}

public class aaa : Iaaa

{

public aaa()

{

a = DateTime.Now.Millisecond;

}

public int a { get; set; }

public string hello(string str)

{

return "hello " + str + " timestamp: " + a;

}

1.4 到一个controller里面测试

注意私有变量，和构造函数的使用即可。

public class testController : Controller

{

private Iaaa _srv;

public testController(Iaaa srv)

{

_srv = srv;

}

public string Index(string id)

{

return _srv.hello(id);

}

访问/test/myname 正确输出"hello myname timestamp 234"
其实跟官网的一模一样：http://simpleinjector.codeplex.com/

2，与WebApi集成

http://simpleinjector.codeplex.com/wikipage?title=Web%20API%20Integration&referringTitle=Integration%20Guide
在同一个项目里测试就行了，更好演示与mvc和与web api集成的区别，所以也不需要新建项目，及添加引用了

2.1 新建一个webapi的控制器tst

基本上是复制test控制器的代码，很简单：

public class tstController : ApiController

{

private Iaaa _srv;

public tstController(Iaaa srv)

{

_srv = srv;

}

public string get(string id)

{

return _srv.hello(id);

}

2.2 测试失败

访问/api/tst/aaa，却直接报错Type 'WebApplication1.Controllers.tstController' does not have a default constructor，按照上面给的官网的集成说明提示更改Global.asax即可，改后如下（见修改点1和2）

protected void Application_Start()

{

AreaRegistration.RegisterAllAreas();

GlobalConfiguration.Configure(WebApiConfig.Register);

FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

RouteConfig.RegisterRoutes(RouteTable.Routes);

BundleConfig.RegisterBundles(BundleTable.Bundles);

//按如下步骤添加

// 1. Create a new Simple Injector container

var container = new Container();

// a.1 webapi, frist register controller 修改点1

var services = GlobalConfiguration.Configuration.Services;

var controllerTypes = services.GetHttpControllerTypeResolver()

.GetControllerTypes(services.GetAssembliesResolver());

// register Web API controllers (important! http://bit.ly/1aMbBW0)

foreach (var controllerType in controllerTypes)

{

container.Register(controllerType);

}

// 2. Configure the container (register)

//container.Register<IUserService, UserService>(Lifestyle.Transient);

//container.Register<IUserRepository, SqlUserRepository>(Lifestyle.Singleton);

//随便写个例子测试，名字就不计较了，Lifestyle的区别自行查文档

container.Register<Iaaa, aaa>(Lifestyle.Transient);

// 3. Optionally verify the container's configuration.

container.Verify();

// 4. Store the container for use by Page classes.

//WebApiApplication.Container = container;

System.Web.Mvc.DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));

// a.2 webapi 按照文档，写在verify()后面修改点2

GlobalConfiguration.Configuration.DependencyResolver = new SimpleInjectorWebApiDependencyResolver(container);

// 5. register global filters //如果有注册全局过滤器的需要加此节点，和下面注释掉的方法

//RegisterGlobalFilters(GlobalFilters.Filters, container);

}

//public static void RegisterGlobalFilters(GlobalFilterCollection filters, Container container)

//{

//}

}

再测试就通过了

3，通过属性注入

我们上面演示的都是通过构造器注入，关于属性注入，SimpleInjector做了严格限制，但是还是支持，需要显式注入：http://simpleinjector.codeplex.com/wikipage?title=Advanced-scenarios&referringTitle=Home#Property-Injection
直接演示一种最简单的方法吧：

container.RegisterInitializer<HandlerBase>(handlerToInitialize => {

handlerToInitialize.ExecuteAsynchronously = true;

});

所以完成版的Global.asax如下：

protected void Application_Start()

{

AreaRegistration.RegisterAllAreas();

GlobalConfiguration.Configure(WebApiConfig.Register);

FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

RouteConfig.RegisterRoutes(RouteTable.Routes);

BundleConfig.RegisterBundles(BundleTable.Bundles);

//按如下步骤添加

// 1. Create a new Simple Injector container

var container = new Container();

// a.1 webapi, frist register controller 修改点1

var services = GlobalConfiguration.Configuration.Services;

var controllerTypes = services.GetHttpControllerTypeResolver()

.GetControllerTypes(services.GetAssembliesResolver());

// register Web API controllers (important! http://bit.ly/1aMbBW0)

foreach (var controllerType in controllerTypes)

{

container.Register(controllerType);

}

// 2. Configure the container (register)

//container.Register<IUserService, UserService>(Lifestyle.Transient);

//container.Register<IUserRepository, SqlUserRepository>(Lifestyle.Singleton);

//随便写个例子测试，名字就不计较了，Lifestyle的区别自行查文档

container.Register<Iaaa, aaa>(Lifestyle.Transient);

container.RegisterInitializer<tstController>(c => c.s2 = new bbb());//显然，其实就是手动指定

// 3. Optionally verify the container's configuration.

container.Verify();

// 4. Store the container for use by Page classes.

//WebApiApplication.Container = container;

System.Web.Mvc.DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));

// a.2 webapi 修改点2，按照文档，写在verify()后面

GlobalConfiguration.Configuration.DependencyResolver = new SimpleInjectorWebApiDependencyResolver(container);

// 5. register global filters //如果有注册全局过滤器的需要加此节点，和下面注释掉的方法

//RegisterGlobalFilters(GlobalFilters.Filters, container);

}

//public static void RegisterGlobalFilters(GlobalFilterCollection filters, Container container)

//{

//}

}

完整版的webapi的controller如下：

public class tstController : ApiController

{

private Iaaa _srv;

public Ibbb s2 { get; set;} //注意s2，是一个属性

public tstController(Iaaa srv)

{

_srv = srv;

}

//演示构造函数注入

public string get(string id)

{

return _srv.hello(id);

}

//演示属性注入

public string get()

{

return s2.curtime;

}

取名字随意了点，包涵。
访问/api/tst/，得到current time is: 2013-12-15T23:06:0，我们并没有在构造器中初始化Ibbb，但已经是从aaa对象里取到了值，测试通过。

4，示例代码

git clone https://github.com/walkerwzy/simpleinjectorSample.git

分类: c#, .net MVC

标签: DI, simpleinjector