MVVM Pattern (v1.2)

For v2.0+, see v2.0 MVVM Pattern.

Registration Modes

Method	View in DI	ViewModel in DI
AddMvvmTransient	AddTransient<TView>()	AddTransient<TViewModel>()
AddMvvmHybrid	AddTransient<TView>()	AddSingleton<TViewModel>()
AddMvvmSingleton	AddSingleton<TView>()	AddSingleton<TViewModel>()

services.AddMvvmTransient<MainView, MainViewModel>();
services.AddMvvmHybrid<SettingsView, SettingsViewModel>();
services.AddMvvmSingleton<AboutView, AboutViewModel>();

ViewModel-First

ViewLocator resolves View from DI:

// ContentControl.Content = viewModelInstance
// → ViewLocator → sp.GetService<TView>()

ILifecycleAware

public partial class MainViewModel : ObservableObject, ILifecycleAware
{
    public Task OnLoadedAsync() => LoadDataAsync();
    public Task OnUnloaded() => SaveStateAsync();
}

Automatically hooked when View loads/unloads.