Unity-C#中关于时间戳的一些方法

转自：http://www.narkii.com/club/thread-367980-1.html  

/// <summary>

    /// 获取当前时间戳
    /// </summary>
    /// <param name="bflag">为真时获取10位时间戳,为假时获取13位时间戳.</param>
    /// <returns></returns>
    public static long GetTimeStamp(bool bflag = true)
    {
        TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
        long ret;
        if (bflag)
            ret = Convert.ToInt64(ts.TotalSeconds);
        else
            ret = Convert.ToInt64(ts.TotalMilliseconds);
        return ret;
    }


    static DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
    public static string NormalizeTimpstamp0(long timpStamp)
    {
        long unixTime = timpStamp * 10000000L;
        TimeSpan toNow = new TimeSpan(unixTime);
        DateTime dt = dtStart.Add(toNow);
        return dt.ToString("yyyy-MM-dd");
    }




    /// <summary>
    /// 时钟式倒计时
    /// </summary>
    /// <param name="second"></param>
    /// <returns></returns>
    public string GetSecondString(int second)
    {
        return string.Format("{0:D2}", second / 3600) + string.Format("{0:D2}", second % 3600 / 60) + ":" + string.Format("{0:D2}", second % 60);
    }


    /// 将Unix时间戳转换为DateTime类型时间
    /// </summary>
    /// <param name="d">double 型数字</param>
    /// <returns>DateTime</returns>
    public static System.DateTime ConvertIntDateTime(double d)
    {
        System.DateTime time = System.DateTime.MinValue;
        System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0));
        Debug.Log(startTime);
        time = startTime.AddSeconds(d);
        return time;
    }


    /// <summary>
    /// 将c# DateTime时间格式转换为Unix时间戳格式
    /// </summary>
    /// <param name="time">时间</param>
    /// <returns>double</returns>
    public static double ConvertDateTimeInt(System.DateTime time)
    {
        double intResult = 0;
        System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
        intResult = (time - startTime).TotalSeconds;
        return intResult;
    }




    /// <summary>
    /// 日期转换成unix时间戳
    /// </summary>
    /// <param name="dateTime"></param>
    /// <returns></returns>
    public static long DateTimeToUnixTimestamp(DateTime dateTime)
    {
        var start = new DateTime(1970, 1, 1, 0, 0, 0, dateTime.Kind);
        return Convert.ToInt64((dateTime - start).TotalSeconds);
    }


    /// <summary>
    /// unix时间戳转换成日期
    /// </summary>
    /// <param name="unixTimeStamp">时间戳（秒）</param>
    /// <returns></returns>
    public static DateTime UnixTimestampToDateTime(DateTime target, long timestamp)
    {
        DateTime start = new DateTime(1970, 1, 1, 0, 0, 0, target.Kind);
        return start.AddSeconds(timestamp);
    }