DateTime.TryParseExact 不适用于预期的字符串

Question

Hi I have the following method and I'm passing it the value "07 Jan 2014 13:48:46" and from what I understand the TryParseExact should be matching the format "dd MMM yyyy hh:mm:ss" and returning true, however it is returning false, any ideas?

string[] formats= {"dd-MM-yyyy hh:mm:ss",
                   "dd MMM yyyy hh:mm:ss",
                   "dd MMM yyyy",
                   "hh-mm-ss",
                   "dd-MM-yyyy",
                   "dd-MM-yy",
                  };

 DateTime result;
 if (DateTime.TryParseExact(value, formats, CultureInfo.CurrentCulture, DateTimeStyles.None, out result))
 {
     return result;
 }
 return null;

Answer 1

24-hour time requires use of HH , not hh . Lowercase h is for 12 hour time.

See: http://msdn.microsoft.com/en-us/library/8kb3ddd4%28v=vs.110%29.aspx

Answer 2

Because none of your format have 24-hour clock .

hh specifier is for 01 to 12 . It doesn't have 13 as an hour.

Use HH specifier instead which is for 00 to 23 .

For more information, take a look at;

• Custom Date and Time Format Strings