Hi, I'm trying to persist a full local file path selected in a fileupload control as it doesn't persist (I understand why) across postbacks. I am using a req field validator. If the page posts back for some reason (there are valid scenarios) I don't want the user to have to choose the same file over again. 

When the page postsback, I want to execute a client-side javascript BEFORE the client-side page validation occurs. If my hidden field used to persist the file path is populated, I want to disable the required field validator on the fileupload control. I looked to see if I could use the req field validator on the hidden field but it doesn't seem as if I can. At this point it seems the validation occurs before my script is executed client-side. I know this sounds messy, any other suggested approaches are welcome. Any hints on how to do this?

 Thanks

 Test on event, if your hidden field has a value just disable your requiredfieldvalidator.  On load, or postback, or whatever you're trying to accomplish.

 Do you have viewstate disabled? All my form fields retain their values on postback unless I specifically clear them with viewstate enabled.

Brandon
 

I wrote an article on my blog about conditional validation.  Please take a look.

http://www.dotnetadvisor.com/Blog/ConditionalValidation.aspx
 

Cheers Rob, I'll work through this.