怎么样实现统计在线浏览人数？

Question

我在网站首页里写入js<script runat="server" type="text/javascript">
   
        void Application_Start(object sender,EventArgs e)
        {
        Application["counter"]=0;
        }        void Session_Start(object sender,EventArgs e)
        {
        Application.Lock();
            if (Application["counter"] == null)
            {
                Application["counter"] = 0;
            }
            Application["counter"]=(int)Application["counter"]+1;
            
            Application.UnLock();
        }        void Session_End(object sender,EventArgs e)
        {
        Application.Lock();
        Application["counter"]=(int)Application["counter"]-1;        Application.UnLock();
        }
</script>
首页尾部输出
<div>
   浏览人数： <% Response.Write(Application["counter"]);%>
</div>
但在浏览页面时无法显示人数，是哪里错了呢？

Answer 1

不是你这样。我有源代码`要的话QQM我81835955

Answer 2

给你段代码看看：在线人员统计，Global.asax：
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
using System.Xml.Linq;namespace CountPerson
{
    public class Global : System.Web.HttpApplication
    {        protected void Application_Start(object sender, EventArgs e)
        {
            #region OnlineUsers
            try
            {
                DataTable userTable = new DataTable();
                userTable.Columns.Add("SessionID");
                userTable.Columns.Add("UserIP");
                userTable.Columns.Add("Browser");
                userTable.Columns.Add("OSName");                userTable.AcceptChanges();
                Application.Lock();
                Application["OnlineUsers"] = userTable;
                Application.UnLock();
            }
            catch
            {            }
            #endregion
        }        protected void Session_Start(object sender, EventArgs e)
        {
            try
            {
                string sessionid = Session.SessionID;
                string userIP = Request.UserHostAddress;
                HttpBrowserCapabilities bc = Request.Browser;
                string osName = "win2000";
                //判断操作系统
                switch (bc.Platform)
                {
                    case "WinNT 5.1":
                    case "WinXP":
                        osName = "Windows XP";
                        break;
                    case "WinNT 5.0":
                        osName = "Win2000";
                        break;
                    case "WinNT":
                        osName = "Win2003";
                        break;
                    default:
                        osName = bc.Platform;
                        break;
                }
                string browser = bc.Type;
                DataTable userTable = (DataTable)Application["OnlineUsers"];
                if (userTable == null)
                    return;
                DataRow[] curRow = userTable.Select("SessionID='" + sessionid + "'");
                if (curRow.Length == 0)
                {
                    DataRow row = userTable.NewRow();
                    row["SessionID"] = sessionid;
                    row["UserIP"] = userIP;
                    row["Browser"] = browser;
                    row["OSName"] = osName;                    userTable.Rows.Add(row);
                    userTable.AcceptChanges();                    Application.Lock();
                    Application["OnlineUsers"] = userTable;
                    Application.UnLock();
                }
            }
            catch
            { 
            }
        }        protected void Application_BeginRequest(object sender, EventArgs e)
        {        }        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {        }        protected void Application_Error(object sender, EventArgs e)
        {        }        protected void Session_End(object sender, EventArgs e)
        {
            Hashtable onlineUserHashtable = (Hashtable)Application["OnlineUsers"];
            onlineUserHashtable.Remove(Request.UserHostAddress);
            try
            {
                string sessionid = Session.SessionID;
                DataTable userTable = (DataTable)Application["OnlineUsers"];
                if (userTable == null)
                    return;
                foreach (DataRow row in userTable.Select("SessionID='" + sessionid + "'"))
                {
                    userTable.Rows.Remove(row);
                }
                userTable.AcceptChanges();
                Application.Lock();
                Application["OnlineUsers"]= userTable;
                Application.UnLock();
            }
            catch
            { 
            }
        }        protected void Application_End(object sender, EventArgs e)
        {        }
    }
}在页面中使用GridView绑定用户列表：
protected void Page_Load(object sender, EventArgs e)
        {
            DataTable userTable = null;
            try
            {
                userTable = (DataTable)Application["OnlineUsers"];
            }
            catch
            {
                Response.Write("获得内存在线数据失败");
            }
            if (userTable != null)
            {
                GridView1.DataSource = userTable;
                GridView1.DataBind();
            }
        }