Microsoft Developer Network - Easy MVVM Example

"This project will give you crash course on WPF MVVM that you can do in your lunch break! Everything you need to know about binding, INotifyPropertyChanged, Dependency Objects & Properites, POCO objects, Business Objects, Attached Properties and much more!

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Easy MVVM examples (in extreme detail)

This article discusses the various methods and tricks used in MVVM to enable a developer to completely separate the user interface from the code.

Table of Contents

• Introduction
• Classic INotifyPropertyChanged
  • Switching windows from traditional event handlers in code-behind
• DataContext Made in Code
  • Closing Windows from the ViewModel
• Using DependencyObject instead of INPC
  • Controlling an Application through CanExecute
  • Closing with a Attached Property via Dependency Property
• Using POCO objects with MVVM
  • Custom Event Self-close Hack
  • Tweaking one property to show the difference
  • A Cleaner 'Interface' Way to Close the Window
• How to consume a closed Business Object (database layer, web service)
  • Wrapping POCOs
  • Polling POCOs
  • Virtually Codeless Master/Detail CRUD Control
    • How to bind and when to update
    • Create, Update, Delete Logic

Introduction

Model View ViewModel is the golden child of WPF, allowing a developer to completely separate their application code from any UI dependencies.

This means an application can be easily be re-skinned and it also makes an application much easier to test.

The View represents any front-end user interface controls (Window, Page, UserControl), the model represents the classes used in the application, and the ViewModel is the middle-man that requests, molds and exposes the data, as properties and commands.

This is article is linked to a TechNet sample project that you can download and explore. It covers many basic concepts of MVVM, and some of the common pitfalls and solutions.

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