MVC :: Passing Of Id To Edit Action

Mar 30, 2010

I am rather new to ASP.NET MVC and am trying to develop good practices and have studied a few tutorials and videos. There seems to be some differences in how people define the signature of a typical edit action method - sometimes the id (primary key) is listed and sometimes not. It seems like letting the framework do the model binding is a GOOD THING, so I will probably have the model (or view model) as a parameter:

ActionResult Edit(int id,
CompanyViewModel company);
ActionResult Edit(CompanyViewModel company);

But, should the id be a parameter too? I assume it is common-place to have the id in a hidden form field as well so the id (primary key) is then already bound in the model (or view model) - if so, what is the id parameter good for? Or should it be the other way around - keep the id parameter and do not bother using a hidden field for it? What are the pros and cons and what is the best practice?

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