Web Services Online Status

[Kevin Gibbons]

Hi,

I am currently trying to write a web service to display the names of
all users logged into a webpage in an online presence list (username
is collected from a database).

Does anyone know a good example of how to do this so that as soon as a
user accesses or leaves the webpage their online status will be
updated for all connected users?

Thanks in advance,
Kevin

[Dan Rogers]

Because web pages are based on HTTP, and HTTP is a connectionless protocol,
unless you arrange for a special HTTP request to say 'I've left the on-line
building', you really can't assume this without implementing an assumption
based on a length of time expiring since you've seen a request from a given
user.
--------------------

>From: [email]kevgibbo@hotmail.com[/email] (Kevin Gibbons)
>Newsgroups: microsoft.public.dotnet.framework.aspnet.webservic es
>Subject: Web Services Online Status
>Date: 14 Feb 2005 03:19:52 -0800
>Organization: [url]http://groups.google.com[/url]
>Lines: 12
>Message-ID: <547b7188.0502140319.14c32d6e@posting.google.com >
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>X-Trace: posting.google.com 1108379993 19234 127.0.0.1 (14 Feb 2005

11:19:53 GMT)

>X-Complaints-To: [email]groups-abuse@google.com[/email]
>NNTP-Posting-Date: Mon, 14 Feb 2005 11:19:53 +0000 (UTC)
>Path:

TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!newsfee d00.sul.t-online.de!t-onli
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microsoft.public.dotnet.framework.aspnet.webservic es:5518

>X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webservic es
>
>Hi,
>
>I am currently trying to write a web service to display the names of
>all users logged into a webpage in an online presence list (username
>is collected from a database).
>
>Does anyone know a good example of how to do this so that as soon as a
>user accesses or leaves the webpage their online status will be
>updated for all connected users?
>
>Thanks in advance,
>Kevin
>