An issue about AJAX.net: the callback or callback parameter is invalid!

The callback parameter is invalid. Use <pages enableEventValidation = "true"/> in the configuration, or use <% @ Page EnableEventValidation = "true" %> On the Page to enable event verification. 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 the ClientScriptManager. RegisterForEventValidation method to register the sending back or callback data for verification.

After careful check and tracking, we found that it would be nice to comment out the sentence in web. config.

<Globalization requestEncoding = "gb2312" responseEncoding = "gb2312"/>

But the problem arises. Do I need to encode each QueryString that transmits a Chinese string!