Postback Issues

[Mike]

I'm having some problems with "Invalid postback or callback argument" on an
ASP.NET page. It appears to only happen on Firefox browsers, but I could be
wrong about that.

At any rate, the exception is raised when the user clicks on a postback link
on the page before the page has completely loaded. Some of these pages are
rather long, so the chances of that happening is increased. And these pages
have a Repeater control and each line on the Repeater contains a postback
link that is built 'on the fly'.

Is there someway to prevent this exception or handle it more gracefully?
For instance, is it possible to disable postbacks until the page has
completed loading? Is there a best practice for trapping the exception?

Thanks,

Mike

[Walter Wang [MSFT]]

Hi Mike,

Please refer to following thread for more information:

http://forums.asp.net/t/955145.aspx?PageIndex=1

Eilon from ASP.Net team posted two replies in the thread to describe
workarounds.

Also, on the 10th page of the thread:
http://forums.asp.net/t/955145.aspx?PageIndex=10, there's also some other
workaround that to override the Render() method of the Page class to move
the __EVENTVALIDATION to the beginning of the page.

As Eilon already pointed out:

<quote>Unfortunately there's no "perfect" solution for this just
yet.</quote>

It's really difficult to get over this issue perfectly.

Regards,
Walter Wang (wa****@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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