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Orders-EF-MVVM ------------------------------------------------------------------------ Orders demo application with Entity Framework and the MVVM pattern This demo shows how following MVVM pattern (Model-View-ViewModel) becomes easy using C1DataSource. View models can be created as live views, which means with little or no code except for simple LINQ statements. It contrasts with the usual practice of creating view models with lots of code building them and even more code synchronizing them with model data when either of them is modified. Live views are synchronized with their sources automatically, there is no need in change notifications and special synchronization code in view models. All you need is to define live views that shape the source data in the way you need them to be shown in the view. This sample is based on the code from the well-known article by Josh Smith, one of the authors of MVVM, "WPF Apps With The Model-View-ViewModel Design Pattern" (http://msdn.microsoft.com/en-us/magazine/dd419663.aspx). Essentially all the files are the same as the originals (bar a few cosmetic changes) except one: ViewModels\OrdersViewModel.cs. In this file, we build the view model class using live views. You can see how many re-shaping functions are applied to model data to construct a view model, all done exclusively through LINQ. This made it easy and required little code. The best part is that it synchronizes automatically with model data when data in either of the two layers is changed - no synchronization code was necessary. The fact that we only changed the way that the view model classes themselves were created (they are still derived from the original base class 'ViewModelBase') and made no other changes to the framework code that Josh Smith had employed in his original sample should serve as an example that this approach is entirely compatible with other frameworks. You can continue to use your preferred frameworks when working with MVVM, but now you have an additional tool to make your MVVM development even easier.
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