public class OnlineManage
{
private static OnlineManage _instance = new OnlineManage();
//private Dictionary _onlineUserList = new Dictionary();
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();
}
}
///
/// 获取当前在线用户总数(包含登录和未登录的)
///
public int Count
{
get { return _onlineSession.Count; }
}
///
/// 在线会员数
///
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 in _onlineSession.Keys)
{
OnlineUserInfo oInfo = _onlineSession[_sKey];
if (oInfo == null)
{
_onlineSession.Remove(_sKey);
}
else
{
if (oInfo.UserID == UserID)
{
return oInfo;
}
}
}
return null;
}
}
}
public OnlineUserInfo this[string sSessionID]
{
get
{
if (_onlineSession.ContainsKey(sSessionID))
return _onlineSession[sSessionID];
else
return null;
}
}
///
/// 获取所有当前在线用户的ID数组
///
public int[] OnlineUserIDs
{
get
{
lock(this)
{
List<int> ids = new List<int>();
foreach(string _sKey in _onlineSession.Keys)
{
OnlineUserInfo oInfo = this[_sKey];
if(oInfo!=null && oInfo.UserID>0)
{
ids.Add(oInfo.UserID);
}
}
return ids.ToArray();
}
}
}
///
/// 用户有活动，存在异常情况：
/// 1. Session未结束，但是换了用户登录
///
///
public void UserActived(string sSessionID,int iUserID)
{
lock (this)
{
OnlineUserInfo oInfo = this[sSessionID];
if (oInfo == null)
{
oInfo = new OnlineUserInfo(sSessionID, iUserID);
_onlineSession.Add(sSessionID, oInfo);
}
else
{
if(oInfo.UserID != iUserID) //考虑同一个页面先后用别的帐号登录
{
oInfo.UserID = iUserID;
oInfo.LoginTime = DateTime.Now;
}
oInfo.LastActiveTime = DateTime.Now;
}
}
}
///
/// 用户离开（未活动时间超时或者用户注销了）
///
///
public void UserLeaved(string sSessionID,int iUserID)
{
lock(this)
{
_onlineSession.Remove(sSessionID);
}
}
///
/// 用户离开（未活动时间超时或者用户注销了）
///
///
public void UserLeaved(string sSessionID)
{
lock (this)
{
_onlineSession.Remove(sSessionID);
}
}
///
/// 检查在线用户状态，如果发现有超时未活动的用户，将其删除
///
public void CheckOnlineUsers()
{
lock(this)
{
//1.先查询出需要删除的Key列表
List<string> _removeKeys = new List<string>();
foreach (KeyValuePair<string, OnlineUserInfo> kvp in _onlineSession)
{
OnlineUserInfo oInfo = kvp.Value;
string _sKey = kvp.Key;
if(oInfo == null)
{
_removeKeys.Add(_sKey);
}
else
{
if(oInfo.UserID>0) //登录会员
{
if (oInfo.NoActiveMinutes > Timeout_Minutes_Member)
{
_removeKeys.Add(_sKey);
}
}
else //未登录会员
{
if (oInfo.NoActiveMinutes > Timeout_Minutes)
{
_removeKeys.Add(_sKey);
}
}
}
}
//2.从容器中删除这些Key
foreach (string _key in _removeKeys)
{
_onlineSession.Remove(_key);
}
_removeKeys.Clear();
}
}
///
/// 获取唯一实例
///
///
public static OnlineManage GetInstance()
{
return _instance;
}
}
///
/// 在线用户信息类
///
public class OnlineUserInfo
{
public int UserID;
public string SessionID;
public DateTime LoginTime;
public DateTime LastActiveTime;
///
/// 构造函数，用于用户新登录时创建用户在线条目
///
/// 活动的用户ID
/// 用户活动时间
public OnlineUserInfo(int iUserID,DateTime dtLoginTime)
{
UserID = iUserID;
SessionID = "";
LoginTime = dtLoginTime;
LastActiveTime = dtLoginTime;
}
///
/// 构造函数，用于用户新登录时创建用户在线条目
///
/// 活动的用户ID
/// 用户活动时间
public OnlineUserInfo(string sSessionID, int iUserID)
{
UserID = iUserID;
LoginTime = DateTime.Now;
LastActiveTime = DateTime.Now;
SessionID = sSessionID;
}
///
/// 用户初次进来并创建了新Session
///
///
public OnlineUserInfo(string sSessionID)
{
UserID = 0;
LoginTime = DateTime.Now;
LastActiveTime = DateTime.Now;
SessionID = sSessionID;
}
///
/// 获取该用户的未活动时长（分钟数）
///
public int NoActiveMinutes
{
get
{
TimeSpan dtSpan = DateTime.Now.Subtract(LastActiveTime);
return (int)dtSpan.TotalMinutes;
}
}
///
/// 获取该用户的在线时长（分钟数）
///
public int OnlineMinutes
{
get
{
TimeSpan dtSpan = DateTime.Now.Subtract(LoginTime);
return (int)dtSpan.TotalMinutes;
}
}
}
本文作者:佚名 来源:http://www.cnblogs.com/caojinqin/