AutoFac使用方法总结三：生命周期

     生命周期

AutoFac中的生命周期概念非常重要，AutoFac也提供了强大的生命周期管理的能力。
     AutoFac定义了三种生命周期：

Per Dependency
Single Instance
Per Lifetime Scope

Per Dependency为默认的生命周期，也被称为’transient’或’factory’，其实就是每次请求都创建一个新的对象

    [Fact]
     public void per_dependency()
     {
         var builder = new ContainerBuilder();
         builder.RegisterType<MyClass>().InstancePerDependency();
         IContainer container = builder.Build();
         var myClass1 = container.Resolve<MyClass>();
         var myClass2 = container.Resolve<MyClass>();
         Assert.NotEqual(myClass1,myClass2);
     }

Single Instance也很好理解，就是每次都用同一个对象

     [Fact]
     public void single_instance()
     {
         var builder = new ContainerBuilder();
         builder.RegisterType<MyClass>().SingleInstance();

         IContainer container = builder.Build();
         var myClass1 = container.Resolve<MyClass>();
         var myClass2 = container.Resolve<MyClass>();

         Assert.Equal(myClass1,myClass2);
     }

Per Lifetime Scope，同一个Lifetime生成的对象是同一个实例

     [Fact]
     public void per_lifetime_scope()
     {
         var builder = new ContainerBuilder();
         builder.RegisterType<MyClass>().InstancePerLifetimeScope();

         IContainer container = builder.Build();
         var myClass1 = container.Resolve<MyClass>();
         var myClass2 = container.Resolve<MyClass>();

         ILifetimeScope inner = container.BeginLifetimeScope();
         var myClass3 = inner.Resolve<MyClass>();
         var myClass4 = inner.Resolve<MyClass>();

         Assert.Equal(myClass1,myClass2);
         Assert.NotEqual(myClass2,myClass3);
         Assert.Equal(myClass3,myClass4);
     }

     [Fact]
     public void life_time_and_dispose()
     {
         var builder = new ContainerBuilder();
         builder.RegisterType<Disposable>();

         using (IContainer container = builder.Build())
         {
             var outInstance = container.Resolve<Disposable>(new NamedParameter("name", "out"));

             using(var inner = container.BeginLifetimeScope())
             {
                 var inInstance = container.Resolve<Disposable>(new NamedParameter("name", "in"));
             }//inInstance dispose here
         }//out dispose here
     }

转载链接：http://niuyi.github.io/blog/2012/04/06/autofact-by-unit-test3/