How To Hack DropDownList Value

Feb 28, 2010

I've got a DropDownList and I'm trying to prevent it from being used as an attack vector. Can I assume that the user is unable to actually change the values of the DDL and postback to the server? At the moment, I get this ASP.NET error message thrown if I try and change the packet after submission:For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.Am I right in thinking that this is due to the integrity being compromised in the viewstate hash?

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