private void BtnStart_Click(object sender, RoutedEventArgs e)
{
if (timer.Currentstate == TimerState.未开始)
{
timer.Start();
}
else if (timer.Currentstate == TimerState.运行)
{
timer.Pause();
}
else if (timer.Currentstate == TimerState.暂停)
{
timer.Continuego();
}
}
