asp.net - require explanation if user changed radiobutton between pageload and postback? -


in form, may make radio button choice today, change mind tomorrow, come back, , make different radio button choice. if so, need explain why decided make change, typing rationale text field.

is there way customvalidator on text field know radiobuttonlist's choice when page loaded, in order compare same radiobuttonlist's choice when page submitted?

all of takes place within formview, worst case scenario, can use formview's itemupdating event @ oldvalues , newvalues, , show/hide label, seemed little hacky, , i'm wondering if there's pure validator way accomplish it.

i ended using hidden fields bind initial values of radiobuttonlists. customvalidator used hidden fields "before" values , current selectedvalue of radiobuttonlists "after" values.


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