asp.net mvc的生命周期主要分三个阶段

1、网址路由对比

2、找到对应的Controller执行相应的Action

3、执行View并返回结果

完整的生命周期

Request->UrlRoutingModule->RouteHandler->MvcHandler->

DefaultControllerFactory->Controller->View Factory->View->Response

执行control和view

当程序执行到MvcHandler,它的入口是ProcessRequest，在MvcHandler中的ProcessRequest

        protected internal virtual void ProcessRequest(HttpContextBase httpContext) {

            SecurityUtil.ProcessInApplicationTrust(() => {

                IController controller;

                IControllerFactory factory;

                ProcessRequestInit(httpContext, out controller, out factory);

                try {

                    controller.Execute(RequestContext);

                }

                finally {

                    factory.ReleaseController(controller);

                }

            });

        }

第一步：获取Controller,ControllerFactory

// 获取控制器的名称

string controllerName = RequestContext.RouteData.GetRequiredString("controller");

//获取控制器工厂，默认是DefaultControllerFactory

factory = ControllerBuilder.GetControllerFactory();

//创建控制器

controller = factory.CreateController(RequestContext, controllerName);

第二步：执行Controller的Action

 controller.Execute(RequestContext);

 最后调用Controller的ExecuteCore方法

        protected override void ExecuteCore() {

            // If code in this method needs to be updated, please also check the BeginExecuteCore() and

            // EndExecuteCore() methods of AsyncController to see if that code also must be updated.

            PossiblyLoadTempData();

            try {

                string actionName = RouteData.GetRequiredString("action");

                if (!ActionInvoker.InvokeAction(ControllerContext, actionName)) {

                    HandleUnknownAction(actionName);

                }

            }

            finally {

                PossiblySaveTempData();

            }

        }

第三步：执行View

如果从Action返回的是ViewResult,Mvc会调用实现IViewEngine对象的FindView方法，然后再调用实现IView（WebFormView）的Render()方法，将

Html返回给客户端