记录登陆人员个数

ApplicationSiteNum.aspx.cs

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

namespace Application
{
public partial class ApplicationSiteNum : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Write("当前在线人数为："+Application["count"].ToString());
}
}
}

Global.asax后台：

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

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

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

Application["ChatLog"] = "你好，欢迎来到聊天室！";
}

protected void Session_Start(object sender, EventArgs e)
{
Application.Lock();
Application["count"] = (int)Application["count"] + 1;
Application.Unlock();
}

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)
{

}

protected void Application_End(object sender, EventArgs e)
{

}
}
}