Without knowing anything about Datasnap or any other kind of middle ware
you may be using (therefore this may be inappropriate or not the best
way), I can think of a couple of ideas.
1) If you are using TCP/IP for communicating then just leave the
connection open and send an update every second or so for the client to read
2) Whether you are using TCP/IP or not you could query the middle-ware
every second or so, passing it an ID for the operation that you
retrieved when it was initiated.
Either way, I think you will end up having to think about threading issues.
Hope I haven't misunderstood what you are asking.
Phil.
Alister Christie wrote:
I'm in the process of porting a desktop BDE application to a multier
application (still using the BDE currently). I'm using the standard
Datasnap stuff available in Delphi to do so (remote datamodules,
clientdatasets, providers etc...). Some of the processes I want to
shift into the middle tier can take minutes to process and was
wondering how to display a progress bar while things are working in
the background. I presume some sort of callback procedure would be
required so that the application can be updated from the middle tier
as to the progress of the operation. Can anyone point me in the right
direction?
Alister Christie
Computers for People
Ph: 04 471 1849 Fax: 04 471 1266
http://www.salespartner.co.nz
PO Box 13085
Johnsonville
Wellington
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