1 首先在全局應用程序裏面添加如下代碼

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;

namespace Events
{
    public class Global : System.Web.HttpApplication
    {

        public Global()
        {
            BeginRequest 
 
+= HandleEvent;
            EndRequest += HandleEvent;
            AcquireRequestState += HandleEvent;
            PostAcquireRequestState += HandleEvent;
        }

        private void HandleEvent(object sender, EventArgs e)
        {
            //httpContext類用於訪問所有有關應用程序，所處理的請求以及正在構建的請求的信息，並且它的屬性currentNotification定義了HttpApplication
事件的子集
 

            string eventName = "<Unknown>";
            switch (Context.CurrentNotification)
            {
                case RequestNotification.BeginRequest:
                case RequestNotification.EndRequest:
                    eventName = Context.CurrentNotification.ToString();
                    
 
break;
                case RequestNotification.AuthenticateRequest:
                    break;
                case RequestNotification.AuthorizeRequest:
                    break;
                case RequestNotification.ResolveRequestCache:
                    break;
                case RequestNotification.MapRequestHandler:
                    break;
                    //當asp.net fromework需要與請求關聯的狀態時，將觸發改事件
                case RequestNotification.AcquireRequestState:
                    if (Context.IsPostNotification)
                    {
                        eventName = "PostAcquireRequestState";
                    }
                    else
                    {
                        eventName = "AcquireRequestState";
                    }
                    break;
                case RequestNotification.PreExecuteRequestHandler:
                    break;
                case RequestNotification.ExecuteRequestHandler:
                    break;
                case RequestNotification.ReleaseRequestState:
                    break;
                case RequestNotification.UpdateRequestCache:
                    break;
                case RequestNotification.LogRequest:
                    break;
                case RequestNotification.SendResponse:
                    break;
                default:
                    break;
            }
            EventCollection.Add(EventSource.Application, eventName);
        }

        protected void Application_Start(object sender, EventArgs e)
        {
            EventCollection.Add(EventSource.Application, "Start");
            Application["message"] = "Aplication Events";
        }

        protected void Session_Start(object sender, EventArgs e)
        {

        }

        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            //收到請求時觸發的第一個事件
            EventCollection.Add(EventSource.Application, "BeginRequest");
            Response.Write(string.Format("request started at {0}", DateTime.Now.ToLongTimeString()));
        }

        protected void Application_EndRequest(object sender,EventArgs e)
        {
            EventCollection.Add(EventSource.Application, "EndRequest");
        }
        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {

        }

        

        protected void Application_Error(object sender, EventArgs e)
        {

        }

        protected void Session_End(object sender, EventArgs e)
        {

        }

        protected void Application_End(object sender, EventArgs e)
        {
            EventCollection.Add(EventSource.Application,"End");
        }
 
    }
}

如何確定asp.net請求生命周期的當前處理事件