使用MVVM处理WPF中的对话框

public class DialogViewModel : ViewModelBase
{
    private string _message;
    public string Message
    {
        get { return _message; }
        set { SetProperty(ref _message, value); }
    }

    public DialogViewModel()
    {
        Message = "Hello, world!";
    }
}

<DataTemplate DataType="{x:Type viewModels:DialogViewModel}">
    <TextBlock Text="{Binding Message}" />
</DataTemplate>

public class MainViewModel : ViewModelBase
{
    public ICommand ShowDialogCommand { get; }

    public MainViewModel()
    {
        ShowDialogCommand = new RelayCommand(ShowDialog);
    }

    private void ShowDialog()
    {
        var dialogViewModel = new DialogViewModel();
        var dialogView = new DialogView(dialogViewModel);
        dialogView.ShowDialog();
    }
}

public class DialogView : Window
{
    public DialogView(DialogViewModel viewModel)
    {
        DataContext = viewModel;
        WindowStartupLocation = WindowStartupLocation.CenterOwner;
        Owner = Application.Current.MainWindow;
        ShowInTaskbar = false;
    }
}