DevExpress WinForms MVVM Framework

The DevExpress MVVM Framework lets you apply the Model-View-ViewModel pattern to WinForms applications. The MVVMContext component bridges a Form (View) and a ViewModel class: it manages the ViewModel lifecycle, resolves services, exposes a Fluent API for property binding and command binding, and hosts behaviors.

The framework supports four ViewModel authoring styles. Prefer the compile-time approach (DevExpress Code Generator or CommunityToolkit.Mvvm) for new projects — it catches binding errors at compile time and produces clean, debuggable code. Use runtime POCO for existing MVVMContext-centric projects, and ViewModelBase only when class hierarchy constraints prevent using POCO.

When to Use This Skill

• Set up the MVVMContext component in a WinForms form.
• Choose a ViewModel type and write properties with INotifyPropertyChanged support.
• Declare synchronous (DelegateCommand) or asynchronous (AsyncCommand) commands with CanExecute.
• Bind editor properties and command buttons via the Fluent API (SetBinding, BindCommand).
• Register and call built-in DevExpress services (IMessageBoxService, IDialogService, INavigationService, etc.) without referencing UI from the ViewModel.
• Write custom services that implement an interface and are injected via RegisterService.
• Attach behaviors to controls (ConfirmationBehavior, EventToCommandBehavior, key shortcuts, custom EventTriggerBase).
• Communicate between ViewModels using the Messenger, parent-child relationships, IDialogService, ISupportParameter, or NavigationService.

Prerequisites & Installation