统计在线人数

如何运用内置对象session和application对象实现统计在线人数

首先创建一个全局应用程序类Global.asax

protected void Application_Start(object sender, EventArgs e)

        {

            if (Application["CountOnline"] == null)

            {

                Application["CountOnline"] = 0;

            }       

        }

        //设置session对象，生存时间为1分钟

        protected void Session_Start(object sender, EventArgs e)

            Session.Timeout = 1;

            int countOnline = (int)Application["CountOnline"];//获取在线人数

            countOnline++;

            Application["CountOnline"] = countOnline;//设置当前在线人数

//会话对象销毁的时候，Session对象减1

        protected void Session_End(object sender, EventArgs e)

            int countOnline = (int)Application["CountOnline"];//获取当前在线人数

            countOnline--;

            Application["CountOnline"] = countOnline;

其次在页面中绑定

<div>

    当前在线人数为：<%=Application["CountOnline"] %>

    </div>