Question

我尝试每10秒在10分钟后在文本文件中写入一些值。我的代码看起来像这样。

    private void button12_Click(object sender, RoutedEventArgs e)
    {
        DispatcherTimer tPOI = new DispatcherTimer();
        tPOI.Tick += new System.EventHandler(dispatcherTimer_TickPOI);
        tPOI.Interval = new TimeSpan(0, 0, 10);
        tPOI.Start();
        MessageBox.Show("recording POI");
    }

    private void dispatcherTimer_TickPOI(object sender, EventArgs e)
    {
        using (StreamWriter file = new StreamWriter(@textBox36.Text, true))
        {
            file.WriteLine("pos POI");
            file.WriteLine(textBox40.Text);
            file.WriteLine(textBox41.Text);
            file.WriteLine(textBox42.Text);
            file.WriteLine(textBox46.Text);
        }
    }

但是现在我不知道如何在10分钟后停止计时器。有人对我有提示吗？

Answer 1

您可以执行以下操作。跟踪StartTime并检查它是否超过10分钟。

private DateTime _startTime; //track the start time
private DispatcherTimer tPOI;

private void button12_Click(object sender, RoutedEventArgs e) 
{
    tPOI = new DispatcherTimer();
    tPOI.Tick += new System.EventHandler(dispatcherTimer_TickPOI);
    tPOI.Interval = new TimeSpan(0, 0, 10);

    _startTime = DateTime.Now; //assign start time when it actually starts

    tPOI.Start();
    MessageBox.Show("recording POI");
}

private void dispatcherTimer_TickPOI(object sender, EventArgs e) 
{
     if (_startTime.AddMinutes(10) < DateTime.Now) //check if it has crossed 10 mins
     { 
        tPOI.Stop();
     } 
     else 
     {
         using(StreamWriter file = new StreamWriter(@textBox36.Text, true)) 
         {
             file.WriteLine("pos POI");
             file.WriteLine(textBox40.Text);
             file.WriteLine(textBox41.Text);
             file.WriteLine(textBox42.Text);
             file.WriteLine(textBox46.Text);
         }
     }
}

C＃如何在10分钟后停止计时器

1 个答案: