Radical Documentation
View on GitHub
Primary version
Primary version
  • Home
  • Presentation
    • AbstractViewModel
    • Conventions
      • Bootstrap Conventions
      • Runtime Conventions
      • Conventions override
    • Commands and DelegateCommand
    • IViewResolver
      • Default view behaviors
      • view life cycle events
        • Callback expectations
        • notify messages
    • Message broker MVVM built-in messages
    • Application boot process
      • Application configuration
      • Application shutdown
      • Singleton applications
    • AbstractMementoViewModel
      • Simple ViewModel graphs
      • Collections and complex ViewModel graphs
    • Validation and Validation Services
    • Resources
      • Services as resources
      • ViewModels as resources
  • UI Composition
    • UI Composition
      • Region content lifecycle
      • TabControl region
      • Create a custom region
  • Concepts
    • Inversion of Control
      • Third party DI containers
    • Entities
      • Property System
    • Messaging and Message Broker
      • POCO messages
      • Standalone message handlers
    • Observers
      • PropertyObserver
      • MementoObserver
      • BrokerObserver
  • Memento
    • Change Tracking Service
      • MementoEntity and MementoEntityCollection
      • Handling change tracking:
        • Simple model
        • Collections
        • Complex objects graph
      • Atomic operations
      • Change Tracking Service API
      • Property Metadata for the ChangeTrackingService
      • Handling collection sync
      • Property State
  • Behaviors
    • DataGrid Behaviors
    • Password
    • Generic routed event handler to command behavior
    • Overlay adorner
      • Busy status manager
    • TextBox behaviors:
      • Command
      • Auto select
      • DisableUndoManager (.Net 3.5 only)
  • Markup Extensions
    • Editor binding
    • Auto Command binding
  • How to
    • Get the view of a given view model
    • Bi-directional communication between different windows/views
    • Handle the busy status during async/long running operations
    • Implement a customer improvement program
    • Manage focus
    • Create a splash screen
    • Access view model after view is closed
    • Intercept ViewModels before they are used
  • Upgrade guides
    • Radical Presentation 1.x to Radical 2.x for .NET Core
    • Radical 2.0.0 to Radical 2.1.0
Powered by GitBook
On this page
  1. Presentation
  2. IViewResolver

Default view behaviors

PreviousIViewResolverNextview life cycle events

Last updated 3 years ago

We have seen how Radical Presentation at runtime and we have told that during the resolution process we inject/attach to the resolved view some behaviors using a convention.

The convention attaches the following behaviors to each resolved view:

  • to every view (every DependencyObject) attaches the “DependencyObjectCloseHandlerBehavior” whose role is to allow the view model to send a close request message to its own view without the need to handle a reference to the view;

  • if the view is a window attaches the “WindowLifecycleNotificationsBehavior” used to notify to the view model the lifecycle state changes of the view (loaded, shown, activated, closing and closed);

  • “else if” the view is a FrameworkElement attaches the “FrameworkElementLifecycleNotificationsBehavior” whose role is notify to the view model when the view is loaded;

The easiest way to handle view lifecycle state changes in the ViewModel is to setup a .

Automatic broker unsubscribe

The WindowLifecycleNotificationsBehavior whenever the view is closed invokes ViewReleaseHandler convention that is responsible to determine if the ViewModel associated with the closed View should be unsubscribed from all the message broker subscriptions, if any, created.

resolves views instances
callback expectation