如何在WPF中检测鼠标左键双击？

Question

在.NET 4.0 WPF中，如何通过左鼠标按钮检测到双击？

看似微不足道的任务。

我没有看到使用MouseDoubleClick确定System.Windows.Input.MouseButtonEventArgs事件中按下了哪个按钮的方法。

Answer 1

MouseDoubleClick传递MouseButtonEventArgs作为事件参数。这会公开ChangedButton属性，告诉您双击了哪个按钮。

void OnMouseDoubleClick(Object sender, MouseButtonEventArgs e)
{
    if (e.ChangedButton == MouseButton.Left)
    {
        // Left button was double clicked
    }
}

Answer 2

您在寻找MouseButtonEventArgs.ChangedButton吗？ API here。

private void MouseButtonDownHandler(object sender, MouseButtonEventArgs e)
{
    Control src = e.Source as Control;

    if (src != null)
    {
        switch (e.ChangedButton)
        {
            case MouseButton.Left:
                src.Background = Brushes.Green;
                break;
            case MouseButton.Middle:
                src.Background = Brushes.Red;
                break;
            case MouseButton.Right:
                src.Background = Brushes.Yellow;
                break;
            case MouseButton.XButton1:
                src.Background = Brushes.Brown;
                break;
            case MouseButton.XButton2:
                src.Background = Brushes.Purple;
                break;
            default:
                break;
        }
    }
}