StructureMap 是一个非常灵巧的IOC框架,与asp.net MVC 更是很好的集成。
准备:
下载StructureMap,基本实例中只需要引用StructureMap.dll文件,并引用命名空间StructureMap
下面是我们需要使用IoC的示例代码,我们要创建TestController,希望通过IoC为TestController的构造函数提供Ants.Provider.ICacheProvider的实例对象。
Step1:
用StructureMapControllerFactory代替默认的DefaultControllerFactory,以及StructureMap的初始化,并在Application_Start()进行注册。
1.StructureMapControllerFactory代替默认的DefaultControllerFactory以及StructureMap的初始化
using System;
using System.Web.Mvc;
using StructureMap;
namespace MvcWeb.Ioc
{
//用StructureMap接管MVC中的Controller的创建工作
public class StructureMapControllerFactory : DefaultControllerFactory
{
protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)
{
if (controllerType == null) return null;
try
{
return ObjectFactory.GetInstance(controllerType) as Controller;
}
catch (StructureMapException)
{
System.Diagnostics.Debug.WriteLine(ObjectFactory.WhatDoIHave());
throw;
}
}
}
//初始化StructureMap,注入相关对象
public class StructureMapInitialize
{
public static void Initialize()
{
ObjectFactory.Initialize(
x => {
x.For<Ants.Provider.IAuthenticateProvider>().Singleton().Use<Ants.Provider.CustomAuthenticateProvider>();
x.For<Ants.Provider.ICacheProvider>().Singleton().Use<Ants.Provider.AspNetCacheProvider>();
}
); }
}
}
2.在Application_Start()进行注册
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RegisterRoutes(RouteTable.Routes);
//初始化StructureMap
MvcWeb.Ioc.StructureMapInitialize.Initialize();
//注册StructureMapControllerFactory以代替DefaultControllerFactory
ControllerBuilder.Current.SetControllerFactory(new MvcWeb.Ioc.StructureMapControllerFactory());
}
Step2:构建TestControler
using System.Web.Mvc;
namespace MvcWeb.Controllers
{
[HandleError]
public class TestController : Controller
{
//_cache将会被自动注入
private readonly Ants.Provider.ICacheProvider _cache;
public TestController(Ants.Provider.ICacheProvider cache)
{
this._cache = cache;
}
/**********************************************
Test/Cache
**********************************************/
public ActionResult Cache()
{
_cache.Insert("test", "Hello Word");
return Content(_cache.Get("test").ToString());
}
}
}
Step3:直接浏览Test/Cache 就可以看到成功的显示“Hello World”.