MVVM Madness: Commands

Question

I like MVVM. I don\'t love it, but like it. Most of it makes sense. But, I keep reading articles that encourage you to write a lot of code so that you can write XAML and don\'t

Answer 1

I think the fault lies in the purity requirement. Design patterns, MVVM included, are a tool in the toolbox, not an end unto themselves. If it makes more sense to break with the purity of the model for a well-considered case (and it clearly looks like you've considered this case), then break with the model.

If that works for you, and you don't believe it's an undue maintenance burden, then I'd say that nothing is wrong with what you've done. I think that you've clearly met the burden of proof for showing that this is a reasonable solution to your problem in spite of what a pure MVVM implementation might be.

(I consider this argument similar to the arguments for multiparadigm languages. While a Pure OO approach can be applied, sometimes doing things in a more functional way is more appropriate. While a Pure Functional approach can be applied, sometimes the trade offs show that OO techniques are more than worth the while.)