How to prevent FileUpload from uploading on Prev click in a wizard?

[Bogdan]

Hi,

I have a FileUpload control on the last step in a wizard control. I'd like
the control to upload the file only when the Finish button is clicked
(present on the last step). Unfortunately the control also uploads the file
when the Previous button is clicked. I'm assuming that this is because the
page is posted-back (submitted) to the server.
Is there a way to change that behaviour?

Thanks,
Bogdan

[Peter Bucher [MVP]]

Hello Bogdan

Is there a way to change that behaviour?

No - not directly

The upload is started by the client when a postback occours.
On the serverside is the upload allready done, and you can choose wheter to
save or not.....
So you have to interact on clientside.

For example:
use (javascript: history(-1);) or similar.
delete your <input type="file.... with help of the DOM

--
Gruss, Peter Bucher
Microsoft MVP - Visual Developer ASP / ASP.NET, Switzerland
http://www.aspnetzone.de/ - ASP.NET Zone, die ASP.NET Community
http://www.aspnetzone.de/blogs/peterbucher/ - Auf den Spuren von .NET