Formatting TimeSpans

问题

I am trying to format a TimeSpan with the following line of code:

.ToString("[d.]hh:mm:ss")

It throws a FormatException, but the exception goes away when I remove the :, the [], and the .. I also cannot include spaces. Does anyone know why this is happening? On this msdn page it clearly states that you can include these characters. I am using .Net framework 4.5.2 btw.

Thanks.

回答1:

TimeSpan ts = new TimeSpan(5, 10, 44);
string test = string.Format("{0:dd\\:hh\\:mm\\:ss\\.ffff}", ts);

回答2:

You need to escape the literal characters. It's quite awkward but this is what you need.

TimeSpan ts = new TimeSpan(1, 2, 3, 4, 555);

string output = ts.ToString("d\\.hh\\:mm\\:ss");

See Docs here.

来源：https://stackoverflow.com/questions/24328466/formatting-timespans