Who is Online? Code Sample - 2eNetWorX

Who is Online Sample Code.

I am sure that you also want to know who is currently using your site, moreover, who is doing what? If your site features a membership system somehow, it's easy to implement such a system so that you can display a list of online users.

The trick is to use global.asa file to capture Session_OnStart and Session_OnEnd events. We simply keep an application variable to store the list of the online users. When a new user starts a session we add him/her to the list, and when his/her session ends we remove the user from the list.

Current implementation utilizes the Scripting.Dictionary object, serving as an advanced array which you can access the items via their keys.

Required files and code

You will need three different pieces of code to get this working as it does on this site:

» global.asa is used to catch the session events.

(If you already have a global.asa, combine this file with yours, if not, just upload this in your application's (site's) root folder)

» header part is used to update the visitor's path info.

(You should put an include statement for _onlineusers.asp file in all of your files. If you have a common header file (like _header.asp here) you only need to include it within that)

» whoson.asp is used to display the list of the online users.

(Either put this as a seperate file, or copy and modify the code to display the list as you like, in any file)

Click on either piece for a syntax highlighted source code.

Although global.asa method is not perfect, it's the fastest one for "Who is Online" implementations. The problem with global.asa is, for some sessions, session_onend event never fires, causing some users seem like hanged on the site.

Well that's it. Contact us if you have any questions, improvements, ideas or contributions.

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