<h3> [ C# ] 상대시간 계산 </h3>

 [ C# ]  상대적 시간 계산

2시간전, 3일전 등등 구하기

const int SECOND = 1;

const int MINUTE = 60 * SECOND;

const int HOUR = 60 * MINUTE;

const int DAY = 24 * HOUR;

const int MONTH = 30 * DAY;

var ts = new TimeSpan(DateTime.UtcNow.Ticks - yourDate.Ticks);

double delta = Math.Abs(ts.TotalSeconds);

if (delta < 1 * MINUTE)

{

  return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";

}

if (delta < 2 * MINUTE)

{

  return "a minute ago";

}

if (delta < 45 * MINUTE)

{

  return ts.Minutes + " minutes ago";

}

if (delta < 90 * MINUTE)

{

  return "an hour ago";

}

if (delta < 24 * HOUR)

{

  return ts.Hours + " hours ago";

}

if (delta < 48 * HOUR)

{

  return "yesterday";

}

if (delta < 30 * DAY)

{

  return ts.Days + " days ago";

}

if (delta < 12 * MONTH)

{

  int months = Convert.ToInt32(Math.Floor((double)ts.Days / 30));

  return months <= 1 ? "one month ago" : months + " months ago";

}

else

{

  int years = Convert.ToInt32(Math.Floor((double)ts.Days / 365));

  return years <= 1 ? "one year ago" : years + " years ago";

}