int i = 0;
void item_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
i += 1;
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = new TimeSpan(0, 0, 0, 0, 300);
timer.Tick += (s, e1) =>
{
timer.IsEnabled = false;
i = 0;
};
timer.IsEnabled = true;
if (i % 2 == 0)
{
timer.IsEnabled = false;
i = 0;
//內容代碼位置
}
}