DateTime To Relative String - CSharp System

CSharp examples for System:DateTime Format

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Description

DateTime To Relative String

Demo Code


using System;/*w w  w .  ja  va 2s  .co  m*/

public class Main{
        public static string ToRelativeString(this DateTime dt)
        {
            var ts = new TimeSpan(DateTime.UtcNow.Ticks - dt.Ticks);
            double delta = Math.Abs(ts.TotalSeconds);

            if (delta < 60)
            {
                return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";
            }
            if (delta < 120)
            {
                return "a minute ago";
            }
            if (delta < 2700) // 45 * 60
            {
                return ts.Minutes + " minutes ago";
            }
            if (delta < 5400) // 90 * 60
            {
                return "an hour ago";
            }
            if (delta < 86400) // 24 * 60 * 60
            {
                return ts.Hours + " hours ago";
            }
            if (delta < 172800) // 48 * 60 * 60
            {
                return "yesterday";
            }
            if (delta < 2592000) // 30 * 24 * 60 * 60
            {
                return ts.Days + " days ago";
            }
            if (delta < 31104000) // 12 * 30 * 24 * 60 * 60
            {
                int months = Convert.ToInt32(Math.Floor((double)ts.Days / 30));
                return months <= 1 ? "one month ago" : months + " months ago";
            }
            int years = Convert.ToInt32(Math.Floor((double)ts.Days / 365));
            return years <= 1 ? "one year ago" : years + " years ago";
        }
}

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