问题
This line of code:
DateTime dt = DateTime.ParseExact(time, "hh:mm", CultureInfo.InvariantCulture);
parses a "time" value of "12:45" just fine, but throws an exception of "13:00"
Should I be using some other CultureInfo value, or do I need to append a "pm" to hour values above 12, or ... ?
Error message is: System.FormatException was unhandled Message=String was not recognized as a valid DateTime.
回答1:
"hh" is the 12-hour clock format (01 to 12). You need to use "HH" for a 24 hour clock.
DateTime dt = DateTime.ParseExact(time, "HH:mm", CultureInfo.InvariantCulture);
回答2:
Try this:
DateTime dt = DateTime.ParseExact(time, "u", CultureInfo.InvariantCulture);
"u" indicates universal sortable format.
回答3:
Though Hans already answered your question in comment section, Here is an MSDN link describing all kinds of date formats used with DateTime.ParseExact method.
来源：https://stackoverflow.com/questions/11232385/datetime-parseexact-does-not-grok-24-hour-time-values