Invalid postback or callback argument.

[sklett]

I just started to get this error. I've googled and read several posts, non
of which have helped (except to turn off event validation - but I don't like
that solution)

I've got a little 'AJAX' mixed in with my web form and I've narrowed the
problem down to this:
when a user does a search, my AJAX stuff hits the server and returns XML
with the results. On the client I iterate over the XML and add a new
Option() element to a list control. If there is one result I don't get this
error, when there are 2 or more I get the error when submitting the form.

I've tried to look at the page source, but apparently when you add Options
using JavaScript the don't show up in the page source. I've added an
alert() call to inspect the values of the results and there is nothing odd
about them.

I'm using .NET 2.0.

I'm not sure what other information would be helpful... if there is
something else that would help, please let me know and I will post ASAP.

Thanks for reading,
Steve

 

[sklett]

Sort of solved. I ended up turning off validation after finding this post:
http://www.mcse.ms/message2257347.html

I would like to find a way to turn off validation for a single control if
possible, but I'm getting the impression this isn't possible.