The callback parameter is invalid. Enable event verification in configuration or on the page

1.When selecting the vehicle information in the subwindow and returning the license plate number, clicking the select button will result in a compilation error:

"/"ApplicationProgramServer error.
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the error message returned or callback parameter is invalid. Use or use <% @ page enableeventvalidation =" true "%> event verification is enabled. For security purposes, this function verifies whether the parameters of the send-back or callback events come from the server controls that initially present these events. If the data is valid and is expected, use clientscriptmanager. registerforeventvalidation method to register the send-back or callback data for verification.
description : RUN Web An unhandled exception occurred during the request. Check the stack trace information for details about the error and the source of the error in Code .

 

Solution: When binding data to form_load, add the ispostback check.