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Editorial Team
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Asked: 2026-05-13T18:58:02+00:00

In my application, I have videos with an image. When I click on any

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In my application, I have videos with an image. When I click on any video, it is showing this message:

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 placed the EnableEventValidation="true" both in web.config in that particular page but it is giving same error.

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1 Answer

  1. Editorial Team

    simple place your method, that fetch the data from the database in “ispostback” method then it will not give any error.
    i got the same problem i place the code in ispostback method in page load it is working fine.

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