/// <summary>
/// 在线用户信息管理类
/// </summary>
public class OnlineManage
{
    private static OnlineManage _instance = new OnlineManage();
    //private Dictionary<int, OnlineUserInfo> _onlineUserList = new Dictionary<int, OnlineUserInfo>();
    private Dictionary<string, OnlineUserInfo> _onlineSession = new Dictionary<string, OnlineUserInfo>();

    public const int Timeout_Minutes = 20;  //非登录会员在线用户过期时间
    public const int Timeout_Minutes_Member = 40; //登录会员在线过期时间

    private OnlineManage()
    {
    }

    public void Clear()
    {
        lock(this)
        {
            //_onlineUserList.Clear();
            _onlineSession.Clear();
        }
    }

    /// <summary>
    /// 获取当前在线用户总数(包含登录和未登录的)
    /// </summary>
    public int Count
    {
        get { return _onlineSession.Count; }
    }

    /// <summary>
    /// 在线会员数
    /// </summary>
    public int MemberCount
    {
        get
        {
            int iRet = 0;
            lock(this)
            {
                foreach (string _sKey in _onlineSession.Keys)
                {
                    OnlineUserInfo oInfo = _onlineSession[_sKey];
                    if (oInfo == null)
                    {
                        _onlineSession.Remove(_sKey);
                    }
                    else
                    {
                        if (oInfo.UserID>0)
                        {
                            iRet++;
                        }
                    }
                }
            }
            return iRet;
        }
    }

    public OnlineUserInfo this[int UserID]
    {
        get
        {
            lock(this)
            {
                foreach (string _sKey i