MVVM development, which is the abbreviation for the Model View ViewModel, is a Microsoft specialization of the Presentation Model design pattern introduced by Martin Fowler. It is targeted at interface development which supports event-driven programming in Windows Presentation Foundation (WPF) and Silverlight on the .NET platforms using XAML and the .NET languages.
MVVM facilitates a clear separation of the graphical user interface from the development of the business logic or back end logic known as the data model. The view model is responsible for exposing the data objects so those objects are both easily developed and used.
MVVM was designed to make use of data binding functions in WPF. It separates the view layer development from the rest of the application by removing almost all of the GUI code. The GUI is written in the framework markup language XAML. This permits the layers of the application to be constructed by separate developers, increasing productivity, extensibility and maintainability.
The core of WPF is a resolution-independent, vector-based rendering engine that is built to take advantage of modern graphics hardware. WPF is comprised of a set of development features that include Extensible Application Markup Language (XAML), user controls, data binding, layout, both 2-D and 3-D graphics, animation, styles, templates, documents, media and text.
Both technologies are included in the Microsoft .NET Framework and Microsoft Visual Studio offers the finest development environment available to professional developers.
XAML is a declarative markup language. As applied to the .NET Framework programming model, XAML simplifies creating a UI for a .NET Framework application. You can create visible UI elements in the declarative XAML markup, and then separate the UI definition from the run-time logic by using code-behind files, joined to the markup through partial class definitions. XAML directly represents the instantiation of objects in a specific set of backing types defined in assemblies. This is unlike most other markup languages, which are typically an interpreted language without such a direct tie to a backing type system. XAML enables a workflow where separate parties can work on the UI and the logic of an application, using potentially different tools.
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