ASP.NET中HttpApplication中ProcessRequest方法中运行的事件顺序；ASP.NET WebForm和MVC总体请求流程图

ASP.NET中HttpApplication中ProcessRequest方法中运行的事件顺序

1.BeginRequest  開始处理请求

2.AuthenticateRequest 授权验证请求，获取用户授权信息
3.PostAuthenticateRequest 获取成功
4.AunthorizeRequest 授权，一般来检查用户是否获得权限
5.PostAuthorizeRequest 获得授权
6.ResolveRequestCache 获取页面缓存结果(假设没有则运行)
7.PostResolveRequestCache 已获取缓存
8.PostMapRequestHandler 创建页面对象
9.AcquireRequestState 获取Session -- 先推断当前页面对象是否实现了IRequiresSessionState接口，假设实现了，则从浏览器发来的请求报文头中获得SessionId，并到server的 Session池中获得相应的Session对象，最后赋值给 HttpContext的Session属性。
10.PostAcquireRequestState 获得Session
11.PreRequestHandlerExecute 准备运行页面对象
×运行页面对象的ProcessRequest方法(1.ashx,1.aspx)。假设请求的是1.aspx。则会运行页面生命周期
12.PostRequestHandlerExecute 运行完页面对象了
13.ReleaseRequestState 释放请求状态
14.PostReleaseRequestState 已释放请求状态
15.UpdateReuqestCache 更新缓存
16.PostUpdateRequestCache 已更新缓存
17.LogRequest 日志记录
18.PostLogRequest 已完毕日志

19.EndRequest 完毕

能够再Global.asax中加入以Application_为前缀+事件名 的方法运行測试！比如：

 public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            WebApiConfig.Register(GlobalConfiguration.Configuration);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }

        public void Application_BeginRequest(object sender, EventArgs e)
        {
            HttpApplication obj = sender as HttpApplication;
            obj.Context.Response.Write("1 Application_BeginRequest<br/>");
        }

        public void Application_ResolveRequestCache(object sender, EventArgs e)
        {
            HttpApplication obj = sender as HttpApplication;
            obj.Context.Response.Write("6 Application_ResolveRequestCache<br/>");
        }

        public void Application_PostResolveRequestCache(object sender, EventArgs e)
        {
            HttpApplication obj = sender as HttpApplication;
            obj.Context.Response.Write("7 Application_PostResolveRequestCache<br/>");
        }
        public void Application_PreRequestHandlerExecute(object sender, EventArgs e)
        {
            HttpApplication obj = sender as HttpApplication;
            obj.Context.Response.Write("11 Application_PreRequestHandlerExecute<br/>");
        }
    }
}

下面附上MVC总体请求流程图。来自传智播客黑马培训班

ASP.NET WebForm总体请求流程图，来自传智播客黑马培训班