Our site has multiple "wizards" where various data is collected over several pages, and cannot be committed to the database until the last step.
What is the best/correct way to make a wizard like this with ASP.Net MVC
I don't believe there is a best/correct way, but the way I'd do it is...
Each wizard gets its own page. Each step gets its own div. All steps are in the same form.
The previous/next buttons would essentially hide/show the div in each step of the process. The last step's submit button submits the entire form. It would be pretty trivial to implement this using jQuery, and it would be easy to maintain as all the wizard steps are in a single ViewPage.
On the controller side, you'd have two controller methods, the HttpVerbs.Get version that would prepare the form for viewing and the HttpVerbs.Post version that would take a FormsResult and parse it to get out the information required to submit the user's answers to storage/other processes.
Wow, your boss stinks.
You can make your Next and Prev buttons using the ActionLink HtmlHelper method.