asp.Netフォーマット表示時間は数ヶ月、数日前、数時間前、数分前、または数秒前

 1:  /// <summary>

 2:          ///            ,   ,    ,    ,    

 3:          /// </summary>

 4:          /// <param name="dt">         </param>

 5:          /// <returns>   ,   ,    ,    ,    </returns>

 6:          public static string DateStringFromNow(DateTime dt)

 7:          {

 8:              TimeSpan span = DateTime.Now - dt;

 9:              if (span.TotalDays > 60)

10:              {

11:                  return dt.ToShortDateString();

12:              }

13:              else if (span.TotalDays > 30)

14:              {

15:                  return "1   ";

16:              }

17:              else if (span.TotalDays > 14)

18:              {

19:                  return "2  ";

20:              }

21:              else if (span.TotalDays > 7)

22:              {

23:                  return "1  ";

24:              }

25:              else if (span.TotalDays > 1)

26:              {

27:                  return string.Format("{0}  ", (int)Math.Floor(span.TotalDays));

28:              }

29:              else if (span.TotalHours > 1)

30:              {

31:                  return string.Format("{0}   ", (int)Math.Floor(span.TotalHours));

32:              }

33:              else if (span.TotalMinutes > 1)

34:              {

35:                  return string.Format("{0}   ", (int)Math.Floor(span.TotalMinutes));

36:              }

37:              else if (span.TotalSeconds >= 1)

38:              {

39:                  return string.Format("{0}  ", (int)Math.Floor(span.TotalSeconds));

40:              }

41:              else

42:              {

43:                  return "1  ";

44:              }

45:          }

46:   

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