Timespan格式

这个问题在这里已经有了答案：

如何在.NET中使用自定义格式String.Format TimeSpan对象？ 18个答案

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没有内置功能，您需要使用自定义方法，如下所示：

TimeSpan ts = new TimeSpan(0, 70, 0);
String.Format("{0} hour{1} {2} minute{3}", 
              ts.Hours, 
              ts.Hours == 1 ? "" : "s",
              ts.Minutes, 
              ts.Minutes == 1 ? "" : "s")

---

public static string Pluralize(int n, string unit)
{
    if (string.IsNullOrEmpty(unit)) return string.Empty;

    n = Math.Abs(n); // -1 should be singular, too

    return unit + (n == 1 ? string.Empty : "s");
}

public static string TimeSpanInWords(TimeSpan aTimeSpan)
{
    List<string> timeStrings = new List<string>();

    int[] timeParts = new[] { aTimeSpan.Days, aTimeSpan.Hours, aTimeSpan.Minutes, aTimeSpan.Seconds };
    string[] timeUnits = new[] { "day", "hour", "minute", "second" };

    for (int i = 0; i < timeParts.Length; i++)
    {
        if (timeParts[i] > 0)
        {
            timeStrings.Add(string.Format("{0} {1}", timeParts[i], Pluralize(timeParts[i], timeUnits[i])));
        }
    }

    return timeStrings.Count != 0 ? string.Join(", ", timeStrings.ToArray()) : "0 seconds";
}

---

从这里复制我自己的答案：如何将TimeSpan转换为格式化的字符串？

public static string ToReadableAgeString(this TimeSpan span)
{
    return string.Format("{0:0}", span.Days / 365.25);
}

public static string ToReadableString(this TimeSpan span)
{
    string formatted = string.Format("{0}{1}{2}{3}",
        span.Duration().Days > 0 ? string.Format("{0:0} days, ", span.Days) : string.Empty,
        span.Duration().Hours > 0 ? string.Format("{0:0} hours, ", span.Hours) : string.Empty,
        span.Duration().Minutes > 0 ? string.Format("{0:0} minutes, ", span.Minutes) : string.Empty,
        span.Duration().Seconds > 0 ? string.Format("{0:0} seconds", span.Seconds) : string.Empty);

    if (formatted.EndsWith(", ")) formatted = formatted.Substring(0, formatted.Length - 2);

    if (string.IsNullOrEmpty(formatted)) formatted = "0 seconds";

    return formatted;
}

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