using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;//聊天用户类public class ChatUser{    private string _Name;//账号    private string _Password;//密码    private DateTime lastUpdated;//上次更新时间    public ChatUser(string name, string password)    {        this._Name = name;        this._Password = password;        this.lastUpdated = DateTime.Now;    }    public string Name//账号    {        get        {            return this._Name;        }    }    public string Password//密码    {        get        {            return this._Password;        }    }    public bool IsExpired(TimeSpan timeSpan)//用户登录是否过期    {        return DateTime.Now - this.lastUpdated >= timeSpan;    }    public void Update()//更新自己的过期时间    {        this.lastUpdated = DateTime.Now;    }}

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