Question

我一直在努力做一个简单的第二小时转换器来练习一些C＃。奇怪的是，当我通过599秒标记时，程序减去60秒。所以，540秒等于9分钟; 599秒等于9分59秒，但600秒等于9分钟。我尝试使用按钮来触发命令而不是textchanged，按钮完成了工作。所以，我估计，问题的根源必须是textchanged事件本身。我将添加三个例子。截图图片是土耳其语，但您很容易理解。

我该如何解决这个问题，以及导致这个问题的原因是什么？这真是令人难以置信。

Screenshot

int second, minute, hour, minuteLeft, secondLeft;

    private void txtTime_TextChanged(object sender, EventArgs e)
    {
        CalculateTime();

    }

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }

    void CalculateTime()
    {
        if (txtTime.Text != "")
        {

            second = Convert.ToInt32(txtSure.Text);
            secondLeft = second % 60;
            second = second - minuteLeft;

            minute = second / 60;
            minuteLeft = minute % 60;
            minute = minute - minuteLeft;

            hour = minute / 60;


            lblMsg.Text = hour.ToString() + " hours, " + minuteLeft.ToString() + " minutes " + secondLeft.ToString() + " seconds.";
        }
        else
        {
            lblMsg.Text = "";
        }

Answer 1

您要从秒数中减去minuteLeft：

second = second - minuteLeft;

应该减去secondLeft值：

second = second - secondLeft;

Answer 2

您可以考虑以不同的方式攻击问题：

var durationInSeconds = Convert.ToInt32(txtTime.Text);
var duration = new TimeSpan(0, 0, durationInSeconds);

var second = duration.Seconds;
var minute = duration.Minutes;
var hour = Convert.ToInt32(Math.Truncate(duration.TotalHours));

TimeSpan非常适合此类问题，并且可以让您自动“＃{提取持续时间的小时，分钟和秒组成部分。

你也可以考虑更换：

hour.ToString() + " hours, " + minuteLeft.ToString() + " minutes " + secondLeft.ToString() + " seconds.";

致电：

public static string ToPrettyFormat(TimeSpan timeSpan)
{
    var dayParts = new[] { GetDays(timeSpan), GetHours(timeSpan), GetMinutes(timeSpan) }
        .Where(s => !string.IsNullOrEmpty(s))
        .ToArray();

    var numberOfParts = dayParts.Length;

    string result;
    if (numberOfParts < 2)
        result = dayParts.FirstOrDefault() ?? string.Empty;
    else
        result = string.Join(", ", dayParts, 0, numberOfParts - 1) + " and " + dayParts[numberOfParts - 1];

    return result.UppercaseFirst();
}

从https://codereview.stackexchange.com/questions/24995/convert-timespan-to-readable-text被盗。

Textchanged事件无法正确计算

2 个答案: