Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> 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.
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Hi,
This exception could be seen in numerous cases. Based on the provided information it is too hard to find the source of issue. Could you share your full page source code along with the code-behind file content? Thus all the people who want to help you will have better understanding of your case.
Regards,
Andrey
the Telerik team
This exception could be seen in numerous cases. Based on the provided information it is too hard to find the source of issue. Could you share your full page source code along with the code-behind file content? Thus all the people who want to help you will have better understanding of your case.
Regards,
Andrey
the Telerik team
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