Hi Kev,

I agree with others that you can consider return your long-run page
immediately(let the service executing at server-side) and at client-side,
you can display some message indicate that the server task is running and
use some client-side script to postback and poll the server-side service
execution status.  For the script , you can either use ASP.NET 2.0's script
callback feature or use the new AJAX framework(you need to install the ajax
runtime components).

#Implementing Client Callbacks Without Postbacks in ASP.NET Web Pages  
http://msdn2.microsoft.com/en-us/library/ms178208.aspx

http://msdn2.microsoft.com/en-us/library/ms178210.aspx

#ASP.NET AJAX
http://ajax.asp.net/

In addition, you can also found some former threads dicussing on this
topics in the newsgroup:

http://groups.google.com/group/microsoft.public.dotnet.framework.aspnet/brow
se_thread/thread/719a56977f0fea5/bcf7bd5271c85ddb

http://groups.google.com/group/microsoft.public.dotnet.framework.aspnet.buil
dingcontrols/browse_thread/thread/20beec83bdb3de20/cb633eaf816a4a2b

Hope this helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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