asp.net 格式化显示时间为几个月,几天前,几小时前,几分钟前,或几秒前(转载)

public static string DateFormatToString(DateTime dt)  
    {  
        TimeSpan span = (DateTime.Now - dt).Duration();  
        if (span.TotalDays > 60)  
        {  
            return dt.ToString("yyyy-MM-dd");  
        }  
        else if (span.TotalDays > 30)  
        {  
            return "1个月前";  
        }  
        else if (span.TotalDays > 14)  
        {  
            return "2周前";  
        }  
        else if (span.TotalDays > 7)  
        {  
            return "1周前";  
        }  
        else if (span.TotalDays > 1)  
        {  
            return string.Format("{0}天前", (int)Math.Floor(span.TotalDays));  
        }  
        else if (span.TotalHours > 1)  
        {  
            return string.Format("{0}小时前", (int)Math.Floor(span.TotalHours));  
        }  
        else if (span.TotalMinutes > 1)  
        {  
            return string.Format("{0}分钟前", (int)Math.Floor(span.TotalMinutes));  
        }  
        else if (span.TotalSeconds >= 1)  
        {  
            return string.Format("{0}秒前", (int)Math.Floor(span.TotalSeconds));  
        }  
        else  
        {  
            return "1秒前";  
        }  
    }  

原文:http://blog.csdn.net/zanychou/article/details/44923497