获取当前时间差

   /// <summary>
    /// 获取当前时间差
    /// </summary>
    /// <param name="strTime"></param>
    /// <returns></returns>
    public static string GetTimeDiff(object strTime)
    {
        TimeSpan nowTime = new TimeSpan(DateTime.Now.Ticks);
        TimeSpan passTime = new TimeSpan(Convert.ToDateTime(strTime).Ticks);
        TimeSpan ts = nowTime.Subtract(passTime);
        if (ts.TotalDays >= 1)
        {
            return ((int)ts.TotalDays) + "天前";
        }
        if (ts.TotalHours >= 1 && ts.TotalHours < 24)
        {
            return ((int)ts.TotalHours) + "小时前";
        }
        if (ts.TotalMinutes >= 1 && ts.TotalMinutes < 60)
        {
            return ((int)ts.TotalMinutes) + "分钟前";
        }
        if (ts.TotalSeconds >= 1 && ts.TotalSeconds < 60)
        {
            return ((int)ts.TotalSeconds) + "秒前";
        }
        return "未知";
    }