1. Registration and Usage

MVVM Example with Dynamic and Static Data Templates

This example demonstrates how to propagate IViewResolverService service within a WPF application using either the application's resources or a variation of the service locator pattern. It also showcases how to register dynamic and static data templates associated with ViewModel types, and how to utilize the {mvvm:TemplateResolver} XAML markup extension for resolving data templates.

Project Structure

• App.xaml.cs

  • Contains the consolidation of IViewResolverService instance and registration of data templates.

• App.xaml

  • Hosts ViewModel instantiation and definition of a predefined generic data template.

• MainWindow.xaml

  • Defines the main XAML layout containing a ListBox and container controls.

• /ViewModels

  • Contains definition of ViewModel types demonstrating inheritance capability from any base type.

• /Views

  • Hosts XAML layouts for dynamic data templates, showcasing ViewDataTemplate type usage.

• /Views/Item2View.xaml

  • Root element is Grid illustrating XAML tree reduction and ability to inherit any FrameworkElement as root.

Noteworthy Code Snippets

Dynamic Data Template Creation in App.xaml.cs

private DataTemplate CreateDynamicDataTemplateForType<T>()
{
    // Demonstrates how to create DataTemplate for view model type using custom ViewDataTemplate from PS.WPF
    return new ViewDataTemplate
    {
        ViewType = typeof(T)
    };
}

IViewResolverService Instance Consolidation and Data Template Registration in App.xaml.cs

protected override void OnStartup(StartupEventArgs e)
{
    var viewResolverService = GetViewResolverService();

    // Register views in default region
    viewResolverService.AssociateTemplate<Item1ViewModel>(CreateDynamicDataTemplateForType<Item1View>());
    viewResolverService.AssociateTemplate<Item2ViewModel>(CreateDynamicDataTemplateForType<Item2View>());
    viewResolverService.AssociateTemplate<Item3ViewModel>((DataTemplate)Resources["Item3ViewDataTemplate"]);

    base.OnStartup(e);
}

Template Resolution Usage in MainWindow.xaml

<ContentControl Grid.Column="1"
                ContentTemplateSelector="{mvvm:TemplateResolver}"
                Content="{Binding ElementName=ListBox, Path=SelectedItem}" />