转换time_t的蜱 [英] convert time_t to ticks

问题描述

我有一个转换蜱time_t的格式的功能。

I have a function that convert ticks to time_t format

 long ticks = DateTime.Now.Ticks;

       long tt = GetTimeTSecondsFrom(ticks);

  long GetTimeTSecondsFrom(long ticks)
    {
        DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
        return (long) (new DateTime(ticks) - epoch).TotalSeconds;
    }

现在我很困惑如何将它与一些数学公式转换回蜱不能用的功能。

Now i am confused how to convert it back to ticks with some mathematical formula and not with a function.

任何建议... ??

Any suggestions...??

感谢

让我来一般情况，并解释。
DateTime.Now.Ticks给我一个值633921719670980000这是在抽动

Let me take a general case and explain. DateTime.Now.Ticks give me a value 633921719670980000 which is in tics

然后我转换这time_t的上述功能，让TT = 1256575167

then i convert this in time_t with the above function and get tt = 1256575167

现在我想这个转换回633921719670980000.为了这个，我需要一个公式

now i want to convert this back to 633921719670980000. for this i need a formula

推荐答案

日期 1970-01-01 00:00:00ž正是62135596800秒（621,355,968,000,000,000蜱），所以要转换的DateTime 滴答计数成 time_t的价值，你可能只是它的规模（由10,000,000分），以获得秒钟，然后再减去偏移量。

The date1970-01-01 00:00:00 Zis exactly 62,135,596,800 seconds (621,355,968,000,000,000 ticks), so to convert aDateTimetick count into atime_tvalue you could just scale it (divide by 10,000,000) to get seconds, and then subtract that offset.

要走另一条路，做相反：偏移秒添加到 time_t的值，然后将10,000,000缩放（乘），以获得蜱。

To go the other way, do the reverse: add the offset seconds to thetime_tvalue, then scale it (multiply by 10,000,000) to get ticks.

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