System.ArgumentException: Invalid postback or callback argument

Question

Server Error in '/WebSite10' Application. Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

I get that mistake.

Note that: I do generate some controls dynamically and call their events..Why does it happen and how can I prevent it?

Alex Reitbort · Accepted Answer · 2011-06-30 12:30:53Z

2

You need to regenerate those controls dynamically on each page_load. Even on Postback. You also need to set their Id to the same value each time.

answered Jun 30, 2011 at 12:30

Alex Reitbort

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Dmitry Makovetskiyd Over a year ago

oooh.. So there is inconsistency between what is postback. I think the controlsIDs are all named. I will see what controls i dont regenerate..

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