在Windows中，显示时间跨度的标签消失了，但在Windows的新版本中却没有 [英] Label displaying Timespan disappearing in XP but not in newer Windows versions

问题描述

我有一个秒表计时器，已将其添加到程序中.在我的Win 7机器和我尝试过的Vista机器上，它都可以正常工作，但是在XP中，计时器启动时，小时和分钟的零值消失了，但是如果重置计时器，它将恢复.这是计时器的所有代码.我已经删除了诊断问题似乎不需要的所有内容:

I have a stopwatch timer that I've added to my program. It's working fine on my Win 7 machine, and on the Vista machines I've tried, but in XP, the hrs and mins zeros disappear when the timer starts, but will come back if I reset the timer. Here's all of my code that I have for the timer. I've removed everything that didn't seem necessary to diagnose the problem:

  DateTime startTime, stopTime;
    TimeSpan stoppedTime;
    bool reset;



    private void btnStopwatchStart_Click(object sender, EventArgs e)
    {
        // Start timer and get starting time
        if (reset)
        {
            reset = false;
            startTime = DateTime.Now;
            stoppedTime = new TimeSpan(0);
        }
        else
        {
            stoppedTime += DateTime.Now - stopTime;
        }
        stopwatchTimer.Enabled = true;
    }

    private void btnStopwatchReset_Click(object sender, EventArgs e)
    {
        // Reset displays to zero
        reset = true;
        lblElapsed.Text = "00:00:00";
    }

    private void btnStopwatchPause_Click(object sender, EventArgs e)
    {
        // Stop timer
        stopTime = DateTime.Now;
        stopwatchTimer.Enabled = false;
    }

    private void stopwatchTimer_Tick(object sender, EventArgs e)
    {
        DateTime currentTime;
        // Determine elapsed and total times
        currentTime = DateTime.Now;

        // Display times
        lblElapsed.Text = HMS(currentTime - startTime - stoppedTime);
    }

    private string HMS(TimeSpan tms)
    {
        // Format time as string, leaving off last six decimal places
        string s = tms.ToString();
        return (s.Substring(0, s.Length - 6));
    }

推荐答案

也许是旧版本的.NET?您的HMS()函数严重取决于TimeSpan.ToString()生成的位数.这是格式化它的更好方法:

Older version of .NET, maybe? Your HMS() function critically depends on the number of digits generated by TimeSpan.ToString(). Here's a better way to format it:

    private static string HMS(TimeSpan tms) {
        return new DateTime(tms.Ticks).ToString("H:mm:ss");
    }

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