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Kevin Gibbons - 14 Feb 2005 11:19 GMT

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

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Dan Rogers - 15 Feb 2005 21:37 GMT

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: kevgibbo@hotmail.com (Kevin Gibbons)
>Newsgroups: microsoft.public.dotnet.framework.aspnet.webservices
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>Content-Transfer-Encoding: 8bit
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11:19:53 GMT)

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

TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!newsfeed00.sul.t-online.de!t-onli
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microsoft.public.dotnet.framework.aspnet.webservices:5518

>X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webservices
>
[quoted text clipped - 10 lines]
>Thanks in advance,
>Kevin

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