动态地向WPF添加事件处理程序

MyButton.Click += MyButton_Click;

private void MyButton_Click(object sender, RoutedEventArgs e)
{
    MessageBox.Show("Button clicked!");
}

public static class ButtonClick
{
    public static readonly DependencyProperty OnClickProperty =
        DependencyProperty.RegisterAttached("OnClick", typeof(ICommand), typeof(ButtonClick), new PropertyMetadata(null, OnOnClickChanged));

    public static ICommand GetOnClick(DependencyObject d)
    {
        return (ICommand)d.GetValue(OnClickProperty);
    }

    public static void SetOnClick(DependencyObject d, ICommand value)
    {
        d.SetValue(OnClickProperty, value);
    }

    private static void OnOnClickChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        var button = d as Button;
        if (button != null)
        {
            if (e.NewValue != null)
            {
                button.Click += Button_Click;
            }
            else
            {
                button.Click -= Button_Click;
            }
        }
    }

    private static void Button_Click(object sender, RoutedEventArgs e)
    {
        var button = sender as Button;
        if (button != null)
        {
            var command = GetOnClick(button);
            if (command.CanExecute(button))
            {
                command.Execute(button);
            }
        }
    }
}

public ICommand ButtonClickCommand { get; set; }

public MainWindow()
{
    InitializeComponent();
    DataContext = this;
    ButtonClickCommand = new RelayCommand(ButtonClick);
}

private void ButtonClick(object parameter)
{
    MessageBox.Show("Button clicked!");
}