如何实现Since方法

Question

我一直在寻找一种显示日期的方法，如stackoverflow

就像是 ：

• 1小时前
• 2分钟前
• 现在

等等...

Answer 1

这里是这样做的一种方法：

    static string GetPrettyDate(DateTime d)
    {
        // 1.
        // Get time span elapsed since the date.
        TimeSpan s = DateTime.Now.Subtract(d);

        // 2.
        // Get total number of days elapsed.
        int dayDiff = (int)s.TotalDays;

        // 3.
        // Get total number of seconds elapsed.
        int secDiff = (int)s.TotalSeconds;

        // 4.
        // Don't allow out of range values.
        if (dayDiff < 0 || dayDiff >= 31)
        {
            return null;
        }

        // 5.
        // Handle same-day times.
        if (dayDiff == 0)
        {
            // A.
            // Less than one minute ago.
            if (secDiff < 60)
            {
                return "just now";
            }
            // B.
            // Less than 2 minutes ago.
            if (secDiff < 120)
            {
                return "1 minute ago";
            }
            // C.
            // Less than one hour ago.
            if (secDiff < 3600)
            {
                return string.Format("{0} minutes ago",
                    Math.Floor((double)secDiff / 60));
            }
            // D.
            // Less than 2 hours ago.
            if (secDiff < 7200)
            {
                return "1 hour ago";
            }
            // E.
            // Less than one day ago.
            if (secDiff < 86400)
            {
                return string.Format("{0} hours ago",
                    Math.Floor((double)secDiff / 3600));
            }
        }
        // 6.
        // Handle previous days.
        if (dayDiff == 1)
        {
            return "yesterday";
        }
        if (dayDiff < 7)
        {
            return string.Format("{0} days ago",
            dayDiff);
        }
        if (dayDiff < 31)
        {
            return string.Format("{0} weeks ago",
            Math.Ceiling((double)dayDiff / 7));
        }
        return null;
    }

资料来源： http : //www.dotnetperls.com/pretty-date