计时器组件未停止

Question

我正在使用Winforms应用，当用户单击它时，我想使标签“滑行”。为此，我创建了一个click事件，该事件启动了一个计时器，该计时器随后将标签逐渐移至窗体上方。然后，我有了一个递增的计数器，当计数器到达某个位置时，计时器应该停止。但是，计时器没有停止。为了测试目的，我故意将计数器限制设置为2，但是标签继续从表格中移开。这是代码：

private void DrawerTimer_Tick(object sender, EventArgs e)
    {
        int counter = 0;
        newsLabel.Top -= 10;
        counter++;
        if (counter == 2)
            drawerTimer.Stop();
    }

    private void News_Click(object sender, EventArgs e)
    {
        drawerTimer.Start();
    }

Answer 1

int counter = 0; // here you are setting it 0
newsLabel.Top -= 10;
counter++; // here you are incrementing it by 1
if (counter == 2) // here you are checking for 2, its never going to get there
   drawerTimer.Stop();

[很有可能您会想做这样的事情

private int _counter; // instance field, field to remember your count

private void DrawerTimer_Tick(object sender, EventArgs e)
{
    newsLabel.Top -= 10;
    counter++; // increment it every tick
    if (counter == 2)
        drawerTimer.Stop();
}

private void News_Click(object sender, EventArgs e)
{
    _counter = 0; // set to zero when start
    drawerTimer.Start();
}