Autofac - MVC/WebApi中的应用 - 敏捷开发

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Autofac前面写了那么多篇, 其实就是为了今天这一篇, Autofac在MVC和WebApi中的应用.

一、目录结构

先看一下我的目录结构吧, 搭了个非常简单的架构, IOC(web), IBLL, BLL, IDAL, DAL, Helper

public interface ITestBll
{
void Say(List<string> msg);
}

我里面都是为了实现Say方法的.

public class TestBll : ITestBll
{
public void Say(List<string> msg)
{
msg.Add("进入TestBll中的方法Say");
var dal = IocContainer.Create<ITestDal>();
dal.Say(msg);
}
}

ITestDal , TestDal 和上面这两个内容其实是一样的, 只是分层不一样. 这里就不贴了.

二、实现

在Application_Start方法的末尾位置, 调用一个注册方法.

protected void MvcInit()
{
IocContainer.RegisterMvc(); IocContainer.RegisterWebApi(); IocContainer.RegisterTypes(System.Reflection.Assembly.Load("BLL").GetTypes()); IocContainer.RegisterTypes(System.Reflection.Assembly.Load("DAL").GetTypes()); IocContainer.Build();
}

mvc, api 在asp.net中, 都是有自己的一套 ioc 方法的, 这里其实也可以不写. 不过这里就是为了在这里面的使用来说的.

在helper类库中, 对autofac具体实现, 加了一些封装.

public class IocContainer
{
private static ContainerBuilder builder; private static IContainer container; static IocContainer()
{
builder = new ContainerBuilder();
} #region 注册接口
public static void RegisterTypeInstancePerLifetimeScope<T>()
{
builder.RegisterType<T>().InstancePerLifetimeScope();
}
public static void RegisterTypeInstancePerDependency<T>()
{
builder.RegisterType<T>().InstancePerDependency();
}
public static void RegisterTypeSingleInstance<T>()
{
builder.RegisterType<T>().SingleInstance();
} /// <summary>
/// 注册接口
/// </summary>
/// <typeparam name="T">实现类型</typeparam>
/// <typeparam name="IT">接口类型</typeparam>
public static void RegisterType<T, IT>()
{
builder.RegisterType<T>().As<IT>();
}
/// <summary>
/// 自动装配接口
/// </summary>
/// <param name="types"></param>
public static void RegisterTypes(params Type[] types)
{
builder.RegisterTypes(types).AsImplementedInterfaces();
} public static void RegisterType<T, IT>(string name)
{
builder.RegisterType<T>().Named<IT>(name);
} public static void RegisterType<T, IT>(int key)
{
builder.RegisterType<T>().Keyed<IT>(key);
} #endregion #region Build
public static void Build()
{
container = builder.Build();
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
//DependencyResolver.SetResolver(new AutofacWebApiDependencyResolver(container));
GlobalConfiguration.Configuration.DependencyResolver = new AutofacWebApiDependencyResolver(container);
}
#endregion #region 注册Mvc
public static void RegisterMvc()
{
builder.RegisterControllers(Assembly.GetCallingAssembly());
}
#endregion #region 注册WebApi
public static void RegisterWebApi()
{
builder.RegisterApiControllers(Assembly.GetCallingAssembly());
}
#endregion #region 创建对象
public static T Create<T>()
{
return container.Resolve<T>();
} public static T Create<T>(string name)
{
return container.ResolveNamed<T>(name);
} public static T Create<T>(int key)
{
return container.ResolveKeyed<T>(key);
} public static object Create(Type t)
{
return container.Resolve(t);
}
#endregion
}