MVP-Patern view and presenter

Hi,

   I am quite confused with my doing.I am working in MVP project.In a page am using a modal pop-up extender inside that i am displaying a grid with radiobutton on each row.On click of the ok  button in modal pop up extender i need to take the selected value and display it in the textbox present in the same page.Now am doing, on click of ok button i am processing the foreach loop and get the value and directly setting into the Textbox.My doubt is,Is that approach is correct?Or i need to raise the ok button event into the presenter.But if i raise the presenter event how can i get the access to the radiobutton selected rows in the view.Hope it is quite clear.Please Guide me to overcome  this scenario .