TimeSpan到友好的字符串库(C#)

public static class TimeSpanExtensions
{
    private enum TimeSpanElement
    {
        Millisecond,
        Second,
        Minute,
        Hour,
        Day
    }

    public static string ToFriendlyDisplay(this TimeSpan timeSpan, int maxNrOfElements)
    {
        maxNrOfElements = Math.Max(Math.Min(maxNrOfElements, 5), 1);
        var parts = new[]
                        {
                            Tuple.Create(TimeSpanElement.Day, timeSpan.Days),
                            Tuple.Create(TimeSpanElement.Hour, timeSpan.Hours),
                            Tuple.Create(TimeSpanElement.Minute, timeSpan.Minutes),
                            Tuple.Create(TimeSpanElement.Second, timeSpan.Seconds),
                            Tuple.Create(TimeSpanElement.Millisecond, timeSpan.Milliseconds)
                        }
                                    .SkipWhile(i => i.Item2 <= 0)
                                    .Take(maxNrOfElements);

        return string.Join(", ", parts.Select(p => string.Format("{0} {1}{2}", p.Item2, p.Item1, p.Item2 > 1 ? "s" : string.Empty)));
    }
}

示例(LinqPad):

new TimeSpan(1,2,3,4,5).ToFriendlyDisplay(3).Dump();
new TimeSpan(0,5,3,4,5).ToFriendlyDisplay(3).Dump();

1 Day, 2 Hours, 3 Minutes
5 Hours, 3 Minutes, 4 Seconds

适合我,看看是否适合你。

这不是一个功能齐全的实现,但它应该让你足够接近。

DateTime dtNow = DateTime.Now;
DateTime dtYesterday = DateTime.Now.AddDays(-435.0);
TimeSpan ts = dtNow.Subtract(dtYesterday);

int years = ts.Days / 365; //no leap year accounting
int months = (ts.Days % 365) / 30; //naive guess at month size
int weeks = ((ts.Days % 365) % 30) / 7;
int days = (((ts.Days % 365) % 30) % 7);

StringBuilder sb = new StringBuilder();
if(years > 0)
{
    sb.Append(years.ToString() + " years, ");
}
if(months > 0)
{
    sb.Append(months.ToString() + " months, ");
}
if(weeks > 0)
{
    sb.Append(weeks.ToString() + " weeks, ");
}
if(days > 0)
{
    sb.Append(days.ToString() + " days.");
}
string FormattedTimeSpan = sb.ToString();

最后,你真的需要让别人知道一份文件将在1年、5个月、2周和3天后到期吗?你不能告诉他们文件将在1年后或5个月后到期吗?只需取最大的单位,并说出该单位的n。

现在还有 Humanizer project

这是我对此的解决方案。它基于此线程中的其他答案,并按照原始问题中的要求(也是我所需要的)增加了对年和月的支持。

[Test]
public void ToFriendlyDuration_produces_expected_result()
{
    new DateTime(2019, 5, 28).ToFriendlyDuration(null).Should().Be("Until further notice");
    new DateTime(2019, 5, 28).ToFriendlyDuration(new DateTime(2020, 5, 28)).Should().Be("1 year");
    new DateTime(2019, 5, 28).ToFriendlyDuration(new DateTime(2021, 5, 28)).Should().Be("2 years");
    new DateTime(2019, 5, 28).ToFriendlyDuration(new DateTime(2021, 8, 28)).Should().Be("2 years, 3 months");
    new DateTime(2019, 5, 28).ToFriendlyDuration(new DateTime(2019, 8, 28)).Should().Be("3 months");
    new DateTime(2019, 5, 28).ToFriendlyDuration(new DateTime(2019, 8, 31)).Should().Be("3 months, 3 days");
    new DateTime(2019, 5, 1).ToFriendlyDuration(new DateTime(2019, 5, 31)).Should().Be("30 days");
    new DateTime(2010, 5, 28).ToFriendlyDuration(new DateTime(2020, 8, 28)).Should().Be("10 years, 3 months");
    new DateTime(2010, 5, 28).ToFriendlyDuration(new DateTime(2020, 5, 29)).Should().Be("10 years, 1 day");
}

private class TermAndValue
{
    public TermAndValue(string singular, string plural, int value)
    {
        Singular = singular;
        Plural = plural;
        Value = value;
    }

    public string Singular { get; }
    public string Plural { get; }
    public int Value { get; }
    public string Term => Value > 1 ? Plural : Singular;
}

public static string ToFriendlyDuration(this DateTime value, DateTime? endDate, int maxNrOfElements = 2)
{
    if (!endDate.HasValue)
        return "Until further notice";

    var extendedTimeSpan = new TimeSpanWithYearAndMonth(value, endDate.Value);
    maxNrOfElements = Math.Max(Math.Min(maxNrOfElements, 5), 1);
    var termsAndValues = new[]
    {
        new TermAndValue("year", "years", extendedTimeSpan.Years),
        new TermAndValue("month", "months", extendedTimeSpan.Months),
        new TermAndValue("day", "days", extendedTimeSpan.Days),
        new TermAndValue("hour", "hours", extendedTimeSpan.Hours),
        new TermAndValue("minute", "minutes", extendedTimeSpan.Minutes)
    };

    var parts = termsAndValues.Where(i => i.Value != 0).Take(maxNrOfElements);

    return string.Join(", ", parts.Select(p => $"{p.Value} {p.Term}"));
}

internal class TimeSpanWithYearAndMonth
{
    internal TimeSpanWithYearAndMonth(DateTime startDate, DateTime endDate)
    {
        var span = endDate - startDate;

        Months = 12 * (endDate.Year - startDate.Year) + (endDate.Month - startDate.Month);
        Years = Months / 12;
        Months -= Years * 12;

        if (Months == 0 && Years == 0)
        {
            Days = span.Days;
        }
        else
        {
            var startDateExceptYearsAndMonths = startDate.AddYears(Years);
            startDateExceptYearsAndMonths = startDateExceptYearsAndMonths.AddMonths(Months);
            Days = (endDate - startDateExceptYearsAndMonths).Days;
        }

        Hours = span.Hours;
        Minutes = span.Minutes;
    }

    public int Minutes { get; }
    public int Hours { get; }
    public int Days { get; }
    public int Years { get; }
    public int Months { get; }
}

我知道这很旧,但我想用一个很棒的裸体包来回答。

Install-Package Humanizer

https://www.nuget.org/packages/Humanizer

https://github.com/MehdiK/Humanizer

示例来自readme.md

TimeSpan.FromMilliseconds(1299630020).Humanize(4) => "2 weeks, 1 day, 1 hour, 30 seconds"

@伊恩·贝克尔需要荣誉

我会把到期时间间隔留到日期相当接近的时候(如果你担心文件更新,可能需要30或60天)。

它可能不会做你想要的一切,但在v4中,微软将 implementing IFormattable on TimeSpan .

要格式化任何长于1天的时段(即月/年/十年等),仅使用Timespan对象是不够的。

Esteche装配

它很容易实现:

using EstecheAssemblies;  

var date = new DateTime("2019-08-08 01:03:21");  
var text = date.ToFriendlyTimeSpan();

看 how-do-i-calculate-relative-time ,问( by user number 1