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Invalid postback or callback argument in GridView ImageButton

Posted by Rahul Kumar Saxena Blogs | ASP.NET Controls Sep 03, 2010
If you are using Imagebutton inside GrideView and on click you are getting Invalid postback or callback then below reason can be responsible for this...
Check you GridView can be DoubleBind  being of this, generated Row ID become change of each GridView row.

I think being of this generated Row IDs in the Postback seems to differ from the row id generated in the initial post.
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