[dba-VB] Is it possible to develop active ASP.NET Web Services?

Yes, but not with ASP.NET.  Classic and .NET ASP are both 'interpreters'
for incoming web pages, similar to server side includes.  There is
nothing in these to run without an incoming web request.  So you can
create your own service on a web server.

However, just to try and guess at what you are trying to do, if you
would like something to occur with a user, without a user's interaction,
you can have stuff hidden in an inline frame.

Drew

-----Original Message-----
From: dba-vb-bounces at databaseadvisors.com
[mailto:dba-vb-bounces at databaseadvisors.com] On Behalf Of Shamil
Salakhetdinov
Sent: Saturday, December 06, 2008 12:22 PM
To: 'Access-D - VB'
Subject: [dba-VB] Is it possible to develop active ASP.NET Web Services?

Hi All,

ASP.NET Web Services are known to be passive IOW they are activated when
called from outside, they do some work, and quit until another web
request
comes...

...I wonder is it possible to develop active web service, which will be
activating itself once in a while (e.g. by using a kind of schedule
controlled by timer + some programmatic logic)...

...that active service could be something like endlessly
running/sleeping/running... between resets web service method IOW a web
service method with timeout set to infinitum...

...because ASP.NET web services application is by definition
multi-threaded
having one thread like the questioned/requested above shouldn't be an
issue
for the other IMO...

...this thread could be started by outside call or even (I guess) by web
service itself calling its own method with infinitum timeout on start-up
*via loopback web service call not directly* or something like that...

...that questioned/requested solution should be pure ASP.NET web service
one
as it's planned to be used on ASP.Net hosting without access to the host
operating system to run scheduled Windows Service etc...

...it could happen that questioned/requested Web Service solution is
built-in ASP.NET feature: I must say I didn't investigate the docs/I
didn't
try to make a POC solution - I expect somebody here might have done
something like that already - all I need is an answer: yes, it can be
done,
RTFM => {{URL}}} ...

Thank you.

--
Shamil

P.S. Sorry, I didn't do in advance investigation - I just didn't want to
get
negative answer by myself - and if positive answer exists I'd be glad to
share it with you, and you'll be ready for such a "tricky"/unusual (?)
solution using Web Services in advance...





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