AutoFac原理图(IOC控制反转，DI依赖注入)

参考资料：Ioc容器Autofac系列（2）-- asp.net mvc中整合autofac

http://www.cnblogs.com/daisy-popule/p/4126599.html

http://www.tuicool.com/articles/VfIRvq

1>创建Asp.net MVC项目并引入Autofac

          

Global.asax

using Autofac;
using Autofac.Integration.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Compilation;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace CMS.MvcUI
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
            BuiderIocContainer();
        }

        public static void BuiderIocContainer()
        {


            var builder = new ContainerBuilder();

            builder.RegisterControllers(System.Reflection.Assembly.GetExecutingAssembly());//注册mvc容器的实现


            //如果有web类型，请使用如下获取Assenbly方法(获取所有需要用到的程序集，放到list中)

            //用GetReferencedAssemblies方法获取当前应用程序下所有的程序集
            var assemblys = BuildManager.GetReferencedAssemblies().Cast<Assembly>().ToList();

            

            builder.RegisterAssemblyTypes(assemblys.ToArray())//查找程序集中以Repository结尾的类型
            .Where(t => t.Name.EndsWith("Bll"))//查找所有程序集下面以Bll结尾的类
            .AsImplementedInterfaces(); //将找到的类和对应的接口放入IOC容器(放到IOC容器中有什么用处？：)


            builder.RegisterAssemblyTypes(assemblys.ToArray())//查找程序集中以Dal结尾的类型
            .Where(t => t.Name.EndsWith("Dal"))
            .AsImplementedInterfaces();//表示注册的类型，以接口的方式注册

            //builder.RegisterAssemblyTypes(assemblys.ToArray()).AsImplementedInterfaces(); //这样写就将应用程序下所有的类都注册了


            //RegisterType表示我要注册什么类型； As<T_UserInfoBll>表示这个类型需要实现什么接口。IT_UserInfoBll就是接口名称
            //builder.RegisterType<T_UserInfoBll>().As<IT_UserInfoBll>();


            // builder.RegisterType<GmsWorkContext>();
            // builder.RegisterType<GmsWorkContext>().PropertiesAutowired(); 




            // builder.RegisterType<UserService>().As<IUserService>();
            // builder.RegisterType<EasyAuthorize>().PropertiesAutowired();



            var container = builder.Build(); //Build()方法是表示：创建一个容器
            //config.DependencyResolver = new AutofacDependencyResolver(container);//注册api容器需要使用HttpConfiguration对象
            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));//注册MVC容器

        }
    }
}

using CMS.IDAL;
using CMS.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace CMS.MvcUI.Controllers
{
    using IBLL;
    public class HomeController : Controller
    {
        IT_UserInfoBll _bll;
        public HomeController(IT_UserInfoBll  bll) //使用构造函数实现注入
        {
            _bll = bll;
                      
        }
        public ActionResult Index()
        {
            
            return View();
        }
	}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CMS.BLL
{
    using IBLL;
    using IDAL;
    using System.Linq.Expressions;
    public class BaseBll<TEntity>:IBaseBll<TEntity> where TEntity:class
    {
        protected IBaseDal<TEntity> _ibasedal;
        //public BaseBll(IBaseDal<TEntity> ibasedal)
        //{
        //    _ibasedal = ibasedal;
        //}
    
        public List<TEntity> QueryWhere(Expression<Func<TEntity, bool>> where)
        {
            return _ibasedal.QueryWhere(where);
        }
    }
}

T_UserInfoBll.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CMS.BLL
{
    using Model;
    using IBLL;
    using IDAL;
    public class T_UserInfoBll : BaseBll<T_UserInfo>, IT_UserInfoBll
    {
        public IT_UserInfoDal _dal;

        public T_UserInfoBll(IT_UserInfoDal dal)
        {
            _dal = dal;
            base._ibasedal = dal;
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CMS.DAL
{
    //using Model;
    using IDAL;
    using System.Linq.Expressions;
    public class BaseDal<TEntity>:IBaseDal<TEntity> where TEntity:class
    {
        BaseDbContext db = new BaseDbContext();
        public List<TEntity> QueryWhere(Expression<Func<TEntity, bool>> where)
        {
            return db.Set<TEntity>().Where(where).ToList();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CMS.DAL
{
    using Model;
    using IDAL;
    public class T_UserInfoDal:BaseDal<T_UserInfo>,IT_UserInfoDal
    {
    }
}

BaseDbContext.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CMS.DAL
{
    using System.Data.Entity;
    public class BaseDbContext:DbContext
    {
        public BaseDbContext()
            : base("salesEntities")
        { }
    }
}