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I am using ASP.NET ajax to dynamically add/remove controls from a page without using full postbacks. The UI is very complicated. Under certain scenarios, when a control on the page causes a full postback, after changing the controls via async postbacks, I get this error:
I can fix it by setting EnableEventValidation=’false’ at the page level.
What are the implications of doing this? Are there times when it is ok to do this or is this a hack?
If you have a WYSIWYG input text box or a textbox expecting HTML, then you have to disable validation or do some JavaScript hack.
The catch is that you will need to provide thorough validation to prevent XSS and such.