测试棱镜DialogService

public class MainViewModel : INotifyPropertyChanged
{
    private string _message;
    public string Message
    {
        get { return _message; }
        set
        {
            _message = value;
            OnPropertyChanged(nameof(Message));
        }
    }

    public ICommand ShowDialogCommand { get; }

    public MainViewModel(DialogService dialogService)
    {
        ShowDialogCommand = new RelayCommand(() => dialogService.ShowDialog(new MyDialogViewModel()));
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class MyDialogViewModel : INotifyPropertyChanged
{
    private string _input;
    public string Input
    {
        get { return _input; }
        set
        {
            _input = value;
            OnPropertyChanged(nameof(Input));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

<Window x:Class="MyApp.Views.MyDialogView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MyDialog" Height="200" Width="300">
    <StackPanel>
        <TextBox Text="{Binding Input, UpdateSourceTrigger=PropertyChanged}" />
        <Button Content="OK" Command="{Binding CloseDialogCommand}" />
    </StackPanel>
</Window>

public class DialogService
{
    private readonly IUnityContainer _container;

    public DialogService(IUnityContainer container)
    {
        _container = container;
    }

    public void ShowDialog<T>(T viewModel) where T : class, INotifyPropertyChanged
    {
        var view = _container.Resolve<T>();
        view.DataContext = viewModel;
        view.ShowDialog();
    }
}