TimeSpan t = TimeSpan.FromSeconds(EnergyRestoreTimer.Instance.SecondsForRestore);
            string sTime = EnergyRestoreTimer.Instance.SecondsForRestore < 3600
                ? $"{t.Hours:D2}:{t.Minutes:D2}:{t.Seconds:D2}"
                : $"{t.Minutes:D2}:{t.Seconds:D2}";
            time.text = sTime;

得到总秒数

var i = TimeSpan.FromTicks(startDate.Ticks).TotalSeconds;

并从秒获取datetime

var thatDateTime = new DateTime().AddSeconds(i)

如果您知道您有一个秒数，您可以通过调用TimeSpan来创建一个TimeSpan值。FromSeconds:

 TimeSpan ts = TimeSpan.FromSeconds(80);

您可以获取天、小时、分钟或秒的数量。或者使用一个ToString重载以任何您喜欢的方式输出它。

private string ConvertTime(double miliSeconds)
{
    var timeSpan = TimeSpan.FromMilliseconds(totalMiliSeconds);
    // Converts the total miliseconds to the human readable time format
    return timeSpan.ToString(@"hh\:mm\:ss\:fff");
}

/ /测试

    [TestCase(1002, "00:00:01:002")]
    [TestCase(700011, "00:11:40:011")]
    [TestCase(113879834, "07:37:59:834")]
    public void ConvertTime_ResturnsCorrectString(double totalMiliSeconds, string expectedMessage)
    {
        // Arrange
        var obj = new Class();;

        // Act
        var resultMessage = obj.ConvertTime(totalMiliSeconds);

        // Assert
        Assert.AreEqual(expectedMessage, resultMessage);
    }

这将以hh:mm:ss格式返回

 public static string ConvertTime(long secs)
    {
        TimeSpan ts = TimeSpan.FromSeconds(secs);
        string displayTime = $"{ts.Hours}:{ts.Minutes}:{ts.Seconds}";
        return displayTime;
    }

TimeSpan构造函数允许以秒为单位传递。只需声明一个TimeSpan类型的变量(秒数)。例:

TimeSpan span = new TimeSpan(0, 0, 500);
span.ToString();