public static string DateToText(DateTime date) { DateTimeSpan dateSpan = DateTimeSpan.CompareDates(date, DateTime.Now); if (dateSpan.Years == 1) { return($"{dateSpan.Years} year"); } else if (dateSpan.Years > 1) { return($"{dateSpan.Years} years"); } else if (dateSpan.Months == 1) { return($"{dateSpan.Months} month"); } else if (dateSpan.Months > 1) { return($"{dateSpan.Months} months"); } else if (dateSpan.Days == 1) { return($"{dateSpan.Days} day"); } else { return($"{dateSpan.Days} days"); } }
public static DateTimeSpan CompareDates(DateTime date1, DateTime date2) { if (date2 < date1) { DateTime sub = date1; date1 = date2; date2 = sub; } DateTime current = date1; int years = 0; int months = 0; int days = 0; Phase phase = Phase.Years; DateTimeSpan span = new(); int officialDay = current.Day; while (phase != Phase.Done) { switch (phase) { case Phase.Years: if (current.AddYears(years + 1) > date2) { phase = Phase.Months; current = current.AddYears(years); } else { years++; } break; case Phase.Months: if (current.AddMonths(months + 1) > date2) { phase = Phase.Days; current = current.AddMonths(months); if (current.Day < officialDay && officialDay <= DateTime.DaysInMonth(current.Year, current.Month)) { current = current.AddDays(officialDay - current.Day); } } else { months++; } break; case Phase.Days: if (current.AddDays(days + 1) > date2) { current = current.AddDays(days); TimeSpan timespan = date2 - current; span = new DateTimeSpan(years, months, days, timespan.Hours, timespan.Minutes, timespan.Seconds, timespan.Milliseconds); phase = Phase.Done; } else { days++; } break; } } return(span); }