C# 时间（以微秒为单位）

Question

I am searching how to format time including microseconds. I'm using class DateTime, it allowes (using properties) to get data till miliseconds, which is not enougth. I tried using Ticks, but I didn't know how to translate it to microseconds.

Answer 1

You can use "ffffff" in a format string to represent microseconds:

Console.WriteLine(DateTime.Now.ToString("HH:mm:ss.ffffff"));

To convert a number of ticks to microseconds, just use:

long microseconds = ticks / (TimeSpan.TicksPerMillisecond / 1000);

If these don't help you, please provide more information about exactly what you're trying to do.

EDIT: I originally multiplied ticks by 1000 to avoid losing accuracy when dividing TimeSpan.TicksPerMillisecond by 1000. However, It turns out that the TicksPerMillisecond is actually a constant value of 10,000 - so you can divide by 1000 with no problem, and in fact we could just use:

const long TicksPerMicrosecond = 10;

...

long microseconds = ticks / TicksPerMicrosecond;

Answer 2

I was unable to get Johns tick to micorosecond conversion to work. Here is how I was able to measure Microsecond and Nanosecond resolution by using ticks and the Stopwatch:

Stopwatch sw = new Stopwatch();
sw.Start();

// Do something you want to time

sw.Stop();

long microseconds = sw.ElapsedTicks / (Stopwatch.Frequency / (1000L*1000L));
long nanoseconds = sw.ElapsedTicks / (Stopwatch.Frequency / (1000L*1000L*1000L));

Console.WriteLine("Operation completed in: " + microseconds + " (us)");
Console.WriteLine("Operation completed in: " + nanoseconds + " (ns)");

Answer 3

“ffffff”就是你所需要的。

return DateTime.Now.ToString("HH:mm:ss.ffffff");

Answer 4

It's:

return DateTime.Now.ToString("HH:mm:ss.ffffff");

for the whole time stamp in format hours:minutes:seconds:microseconds

return DateTime.Now.ToString(".ffffff");

if you need only residual microseconds.