using System;
using System.Collections;
using System.ComponentModel;
using System.Web;
using System.Web.SessionState;

namespace CountPeople
{
/// <summary>
/// Global 的摘要说明。
/// </summary>
public class Global : System.Web.HttpApplication
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;

public Global()
{
InitializeComponent();
}

protected void Application_Start(Object sender, EventArgs e)
{
Application["total"]=0;
Application["online"]=0;
}

protected void Session_Start(Object sender, EventArgs e)
{

Application.Lock();
Application["total"]=(int)Application["total"]+1;
Application["online"]=(int)Application["total"]+1;
Application.UnLock();
}

protected void Application_BeginRequest(Object sender, EventArgs e)
{

}

protected void Application_EndRequest(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)
{
Application.Lock();
Application["online"]=(int)Application["online"]-1;
Application.UnLock();
}

protected void Application_End(Object sender, EventArgs e)
{

}

#region Web 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
}
#endregion
}
}

当我只有一个用户的时候,显示的却是总人数一个,当前在线有2个.