Invalid postback or callback argument. Event validation is enabled using ''

Question

I am getting the following error when I post back a page from the client-side. I have JavaScript code that modifies an asp:ListBox on the client side.

How do we fix

Answer 1

I implemented a nested grid view and i faced the same problem .I have used LinkButton instead of image button like this:

before i had a column like this:

I have replaced like this.