Hi,

I have a gridview control in a callback-panel. Everything works fine, but when I'm includng the grdview in the Callback-Trigger and select a record in the gridview, the follwing error occurs:

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(origingal in german language)
Ungültiges Postback- oder Callbackargument. Die Ereignisvalidierung wird mithilfe von <pages enableEventValidation="true"/> in der Konfiguration oder mithilfe von <%@ Page EnableEventValidation="true" %> auf einer Seite aktiviert. Aus Sicherheitsgründen überprüft dieses Feature, dass Argumente für Postback- oder Callbackereignisse von dem Serversteuerelement ausgehen, von dem sie ursprünglich gerendert wurden. Wenn die Daten gültig sind und erwartet wurden, verwenden Sie die ClientScriptManager.RegisterForEventValidation-Methode, um die Postback- oder Callbackdaten für die Validierung zu registrieren.
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(translated by myself)
invalid Postback- oder Callbackargument. the event validation supported by <pages enableEventValidation="true"/> in the configuration or supported by <%@ Page EnableEventValidation="true" %> on a page was activated. Due to security reasons this feature checks, that the argument for postback- or callback-events from the servercontrol are the same, like they are renderd previously. If this data is valid, use the ClientScriptManager.RegisterForEventValidation-Methode, to registrate the Postback- orCallbackdata for validation.

Do you have an example, where and how to use the "ClientScriptManager.RegisterForEventValidation-Method" ?

right, that wasn't the issue.
I've made further investigations and found out, that the problem is that by selecting a datarow I want to do a response.redirect to proceed to another page.

So what should I do now?

Is there a way to tell the callbackpanel, that I want to trigger the "gridview_sorted" and "gridview_paging" events, but not the "gridview_Response" event?

I've found out, that the callback panel has its own redirect property. Using this, it works fine.
So it is a matter of your control, even I should have read the documentation more carefully.