如何从Try-Catch中停止DispatcherTimer？

Question

请帮助我理解如何在第一次尝试失败后停止在WPF DispatcherTimer的MethodOne()事件处理程序中执行dispatcherTimer.Tick的尝试。

        TimeSpan ts = new TimeSpan(0, 0, 5);
        DispatcherTimer dispatcherTimer = new DispatcherTimer();
        dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
        dispatcherTimer.Interval = ts;
        dispatcherTimer.Start();
 ...

    private void dispatcherTimer_Tick(object sender, EventArgs e)
    {           
        try
        {
           MethodOne()
        }
        catch (Exception)
        {
            // Here I would like prevent code from trying to execute MethodOne()
        }  
    }

我想设置一些锁定或停止计时器，但是尝试这样做我遇到了Try-Catch构造中其他代码的可见性问题而不确定如何正确克服它。

Answer 1

这就是“发件人”参数的用途：

private void dispatcherTimer_Tick(object sender, EventArgs e)
{           
    try
    {
       MethodOne()
    }
    catch (Exception)
    {
        (sender as DispatcherTimer).Stop();
    }  
}