Presentation about the MVVM pattern and some experiences of different MVVM frameworks for Windows Phone 7.

2. MVVM
Johan Lindfors

3. model-view-viewmodel
view
viewmodel
model

4. separation of concerns
• modularity
• loose coupling
• role separation
• tool friendly
• maintainability
• less code
• testability

5. separation of concerns
• role separation
• tool friendly
• less code

6. ”everybody wants choices,
no one wants to choose”

8. • role separation + ++ + -
• tool friendly ++ + + -
• less code + + ++ -

9. • role separation + ++ + -
• tool friendly ++ + + -
• less code + + ++ -
• coolness - + + ++

10. • modularity - + + ++
• loose coupling - + + ++
• role separation + ++ + -
• tool friendly ++ + + -
• maintainability ++ + - +
• less code + + ++ -
• testability - + + ++
• coolness - + + ++

11. demo

12. model
• platform independence?
• PortableClassLibrary?
• [DataContract]

13. view
• xaml
• popups
• animations
• dispatcher

14. view-model
• encapsulation or incorporation of model?
• instantiation?
1. per view/page in code
2. per view/page in xaml
3. per application instance
4. using view-model-locator
• converters or conversions?

15. design time
using System.ComponentModel;
...
if (DesignerProperties.IsInDesignTool) {
}
• mock service or view model?
• what about demo time?

16. lesson learned
design code

17. johan.lindfors@coderox.se

18. resources
• www.mvvmexplained.com
• caliburnmicro.codeplex.com
• mvvmlight.codeplex.com
• compositewpf.codeplex.com
• programmeramera.se
• www.coderox.se