submit and do html form string in asp mvc controler side : i have html string like this in controller 
i receive this from web service (not important)

    string str ="<form name='jy'action='https://' method='POST'><input type=submit value='Pay'></form>";


i should send this to view and show to user and user should click on submit and ...
but i want do this form and submit it automatically in controller side .
i mean no need to show this to user then user click on submit
it useless
how can i do this?