Question

I am asking this question to make sure myself that I understood the subject.

“The only way to have a submit button inside a partial view is using Ajax techniques to submit the form”

Answer 1

Well, technically you could do a normal postback from a partial view. But that would tend to defeat the point of a partial:

1. the entire page would have to be re-loaded, which means the result of the partial-view postback would need to be a complete page.
2. the partial view’s modularity suffers, because the result of its postback falls out of the partial view’s scope (ie, the partial view needs to know about the entire current page).

So, it’s an irregular thing to do a non-AJAX postback from a partial view. But there are scenarios where it would be useful/appropriate. Consider for example a “login” partial: you may want to post the credentials back to a specific controller/action, and have that action redirect back to the current page. In that case you could reasonably use a non-AJAX form.