Asp.net 之Application

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Application["App1"] = "value1";
        Application["App2"] = "value2";
        Application["App3"] = "value3";
        int N;
        for (N = 0; N < Application.Count; N++)
        {
            Response.Write("变量名:" + Application.GetKey(N));
            Response.Write("变量值:" + Application.Get(N) + "</br>");
        }
        Application.Lock();
        Application["App1"] = "zhang";
        Application["App2"] = "wang";
        Application["App3"] = "li";
        Application.UnLock();

        //修改后的变量
        Response.Write("修改后的变量值</br>");
        for (N = 0; N < Application.Count; N++)
        {
            Response.Write("变量名:" + Application.GetKey(N));
            Response.Write("变量值:" + Application.Get(N) + "</br>");
        }

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Application.Lock();

        Application["PageClick"] = (int)Application["PageClick"] + 1;
        Application["UserVisit"] = (int)Application["UserVisit"] + 1;

        Application.UnLock();

        Response.Write(string.Format("页面单击数：{0}<br/>", Application["PageClick"]));

        Response.Write(string.Format("用户访问数：{0}<br/>", Application["UserVisit"]));
    }
}

<%@ Application Language="C#" %>

<script runat="server">

    void Application_Start(object sender, EventArgs e)
    {
        //在应用程序启动时运行的代码
       Application["count"] = 0;

    }

    void Application_End(object sender, EventArgs e)
    {
        //在应用程序关闭时运行的代码

    }

    void Application_Error(object sender, EventArgs e)
    {
        //在出现未处理的错误时运行的代码

    }

    void Session_Start(object sender, EventArgs e)
    {
        //在新会话启动时运行的代码
        Application.Lock();
        Application["count"] = (int)Application["count"] + 1;
        Application.UnLock();

    }

    void Session_End(object sender, EventArgs e)
    {
        //在会话结束时运行的代码。
        // 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
        // InProc 时，才会引发 Session_End 事件。如果会话模式
        //设置为 StateServer 或 SQLServer，则不会引发该事件。
        Application.Lock();
        Application["count"] = (int)Application["count"] -1;
        Application.UnLock();

    }

</script>