c# - System.ArgumentException: Invalid postback or callback argument -


invalid postback or callback argument. event validation enabled using in configuration or <%@ page enableeventvalidation="true" %> in page. security purposes, feature verifies arguments postback or callback events originate server control rendered them. if data valid , expected, use clientscriptmanager.registerforeventvalidation method in order register postback or callback data validation.

your code-generated (java)script contains xml or html markup, not allowed asp.net built-in xss validation.


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