On last Saturday (i.e. 9th July 2011) I delivered one hour session on "MVVM from Scratch using Silverlight" in Pune User Group's (PUG) Monthly meet. The session was full of demo and very little with slides.

1. MVVM from Scratch using Silverlight - By Kunal Chowdhury

2. Agenda What is MVVM? Why to use MVVM? Events Replacement Demo MVVM Guidelines

3. What is MVVM? MVVM stands for: (M)odel (V)iew (V)iew (M)odel View ViewModel Model

4. What is MVVM? (contd.) View ViewModel Model

5. Why to use MVVM? Loose coupling between the Model, View and ViewModel Create almost 0 code behind lines Reusability of the ViewModel code Unit testing of the ViewModel independently Designers can work in the View without messing up the logic Would benefit from a root ViewModel class for the state management

6. Event Replacement Notification Command Event Aggregation Behavior

7. Demo

8. MVVM Guidelines Separate your View and ViewModel Don’t write any code in .xaml.cs unless require Try to use the Behavior whenever require. This will make sure that, your code behind is clean Your ViewModel should not know it’s View ViewModel should not have any instance of UIElements Expose properties and Bind them in the View

9. Resources Silverlight Articles –http://tinyurl.com/silverlightarticles MVVM Articles - http://tinyurl.com/mvvmarticles Silverlight Zone – http://www.silverlight-zone.com Silverlight.Net – http://www.silverlight.net

10. Questions and Answers

11. Thank you