data within a hidden form field.watch the source
page after you’ve submitted the form,then look
for the following codes:
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE"
value="/wEPDwUKLTEwNDY1Nzg0MQ9…0fMCR+FN5P6v5pkTQwNEl5xhBk" />
you can save any value of a variable in a ViewState-
string temp="test";
ViewState["SurveyId"]=temp;
then you can get back the value later by the following
way-
string var=ViewState["SurveyId"];