get session ID in ASP.Net

Question

how can I get IDs of all current sessions?

Answer 1

If you want a way to store a list of the current sessions where you control the backing store, so that you may store extra data about the client, you can use a list. (I'm writing the following example from the top of my head)

Hook into Application_SessionStart in the global.asax.cs file:

static List sessions = new List();
static object sessionLock = new object();

void Application_SessionStart()
{
    lock (sessionLock) {
        sessions.Add(Session.SessionID);
    }
}

void Application_SessionEnd()
{
    lock (sessionLock) {
        sessions.Remove(Session.SessionID);
    }
}

Alternatively, you can use a dictionary, storing the session ID as a key, and extra data about that user as the value. Then you can easily create a page that shows all current user sessions, for example, for an admin site to show current user sessions.

SessionEnd will only be called if your sessions are InProc.