http://msmvps.com/blogs/nunogodinho/archive/tags/UX/Prism/default.aspxTags: UX, PrismenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/nunogodinho/archive/2009/11/18/pdc09-day-two-advanced-topics-for-building-large-scale-applications-with-microsoft-silverlight.aspxThu, 19 Nov 2009 01:17:45 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1740606NunoGodinho0http://msmvps.com/blogs/nunogodinho/rsscomments.aspx?PostID=1740606http://msmvps.com/blogs/nunogodinho/commentapi.aspx?PostID=1740606http://msmvps.com/blogs/nunogodinho/archive/2009/11/18/pdc09-day-two-advanced-topics-for-building-large-scale-applications-with-microsoft-silverlight.aspx#comments<p><strong>MVVM – Model-View-ViewModel</strong></p> <ul> <li>Separation of concerns</li> <li>View = handled UI</li> <li>Model = contains pure data</li> <li>ViewModel = communicates between View and Model through bindings</li> <li>Works Great with Silverlight and WPF</li> <ul> <li>XAML based data bindings</li> </ul> <li>Testable</li> </ul> <p>&#160;</p> <ul> <li><strong>Model</strong></li> <ul> <li>Represents the Data</li> <li>The entity</li> <li>Not required to know where it gets the data from</li> <ul> <li>WCF service, WCF Ria Services</li> </ul> </ul> <li><strong>View</strong></li> <ul> <li>The Screen, the UI</li> </ul> <li><strong>ViewModel</strong></li> <ul> <li>Main source of logic for the MVVM triad</li> <li>Connects the Model and the View</li> <li>Abstracts the View</li> <li>Public Properties that are bound to the View</li> <li>INotifyPropertyChanged and INotifyCollectionChanged talk to the view through bindings</li> <li>Listens for changes from the View made to the Model</li> </ul> <li><strong>Variations of the MVVM</strong></li> <ul> <li>View First</li> <ul> <li>ViewModel is declared as StaticResource in the Views XAML</li> <ul> <li>Works well in Blend</li> </ul> <li>Another way is to create the ViewModel in the View’s code-behind</li> </ul> <li>ViewModel First</li> <ul> <li>View is injected into the ViewModel’s constructor</li> <li>Doesn’t allow the possibility to use Blend</li> </ul> <li>View and ViewModel Marriage</li> <ul> <li>View must be paired with the ViewModel somehow</li> <li> Doesn’t allow the possibility to use Blend</li> </ul> </ul> <li>What don’t we have with MVVM</li> <ul> <li>Commanding</li> </ul> </ul> <p><strong>Prism 2</strong></p> <ul> <li>Prism is a set of options</li> <li>Use what you want and ignore the rest</li> <li>Technical Concepts:</li> <ul> <li>Modules</li> <li>Shell</li> <li>Commands</li> <li>Containers</li> <li>Regions</li> <li>Bootstrapper</li> <li>Event Aggregation</li> <li>Unity and Dependency Injection</li> </ul> </ul><div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=1740606" width="1" height="1">MicrosoftSilverlightUXSilverlight OfflinePrism