Script Error is getting displayed

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I am using server side controls and also clientside scripting when I am clicking on server control
I getting below error

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Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 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 resolved it by using

<pages enableeventvalidation="false" />

but I do not want to use it.I want to know where is the exact issue?
How can I know that issue?How can I resolve?

Posted 16-Jun-13 23:33pm

syna syna

Updated 16-Jun-13 23:53pm

RelicV

v2

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_Amy · Answer 1 · 2013-06-16T23:43:00

In every PostBack, ASP.NET validates the request and excecutes the event validation. It will check for the event which is fired and the control that is firing the event. If the controls are not expected to fire such event, then this exception will be thrown.

But when using UpdatePanels, these errors are inescapable. So, the only option is to set EnableEventValidation property to fase.

--Amit