private List<string> getOnlineUsers()
{
List<string> activeSessions = new List<string>();
object obj = typeof(HttpRuntime).GetProperty("CacheInternal", BindingFlags.NonPublic | BindingFlags.Static).GetValue(null, null);
object[] obj2 = (object[])obj.GetType().GetField("_caches", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(obj);
for (int i = 0; i < obj2.Length; i++)
{
Hashtable c2 = (Hashtable)obj2[i].GetType().GetField("_entries", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(obj2[i]);
foreach (DictionaryEntry entry in c2)
{
object o1 = entry.Value.GetType().GetProperty("Value", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(entry.Value, null);
if (o1.GetType().ToString() == "System.Web.SessionState.InProcSessionState")
{
SessionStateItemCollection sess = (SessionStateItemCollection)o1.GetType().GetField("_sessionItems", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(o1);
if (sess != null)
{
if (sess["loggedInUserId"] != null)
{
activeSessions.Add(sess["loggedInUserId"].ToString());
}
}
}
}
}
return activeSessions;
}</string></string></string>
by using this you can get the list of all active sessions ,so when the user gets login try to check ,user is already present in the list or not.
Reference:
http://stackoverflow.com/questions/8854176/get-a-list-of-all-active-sessions-in-asp-net[
^]
Submit an article or tip