MVVM where to put Data Access Layer?

Question

I am investigating WPF\'s MVVM design pattern. But am unsure where to put the Data Acess code?

In some examples I have looked at, data access is performed directly i

Answer 1

I would add another layer, essentially what you want is a data factory. You want to create a set of classes that will CRUD to the database for you and return clean POCO objects to the ViewModel.

A good example to look at would the Nerd Dinner book. It covers MVC not MVVM but the patterns are very similar and the way they access data in that solution would be good starting point.

Hope this helps.