C # (C Sharp) string and time conversion to each other

C # (C sharp ) The conversion of strings and times.

One, datetime–> string

The time type is converted to a string type, which is fairly simple, and calls the ToString () method directly. Such as:

DateTime dt = DateTime.Now;

String dtstr = dt. ToString ();

If you want to format the output, you can write this:

Dt.        ToString ("YYYY year mm month DD Day"); November 5, 2005
Dt.                      ToString ("Yyyy-mm-dd"); 2005-11-5

String.                  Format ("{0:d}", DT); 2005-11-5
String.                  Format ("{0:d}", DT); November 5, 2005

The Time type format (a character type) can be in two ways: 1, custom time format. own definition of the composition and representation of time; 2. Standard Time format. A limited representation provided by the standard library. (Detailed situation reference list)

Second, string-> DateTime

String dtstring = "2009-10-12 00:12:05";

DateTime dt = DateTime.Parse (DTSTR); Way One

DateTime DT2 = Convert.todatetime (DTSTR); Mode two

Of course datetime also has a variety of representations (unformatted to string type), such as:

Dt.                  TOFILETIMEUTC (); 127756704859912816
Dt.                    ToLocalTime (); 2005-11-5 21:21:25
Dt.            Tolongdatestring (); November 5, 2005

Of course, if you want to print it out eventually, you need ToString () to convert to a string type.

Other methods of time, attributes and operations

Dt. Year//2005 dt. Date//2005-11-5 0:00:00 dt. DayOfWeek//saturday dt. DayOfYear//309 dt. Hour//13 dt.millisecond//441 dt. Minute//30 dt. Month//11 dt. Second//28 dt. Ticks//632667942284412864 dt. TimeOfDay//13:30:28.4412864 DT//2005-11-5 13:47:04 operation: dt. Addyears (1)//2006-11-5 13:47:04 dt. AddDays (1.1)//2005-11-6 16:11:04 dt. AddHours (1.1)//2005-11-5 14:53:04 dt. Addmilliseconds (1.1)//2005-11-5 13:47:04 dt. Addmonths (1)//2005-12-5 13:47:04 dt. AddSeconds (1.1)//2005-11-5 13:47:05 dt. AddMinutes (1.1)//2005-11-5 13:48:10 dt. Addticks (1000)//2005-11-5 13:47:04 dt.compareto (DT)//0 dt. Equals ("2005-11-6 16:11:04")//false dt. Equals (DT)//true dt. GetHashCode ()//1474088234 dt. GetType ()//system.datetime dt. GetTypeCode ()//datetime

Reference:

Custom DateTime Formatting

There are following custom format specifiers y (year), M (month), D (Day), H (hour), H (Hour), M (minute), S (second ), F (second fraction), F (second fraction, trailing zeroes, are trimmed), t (p.m or a.m) and Z (time zone).

Following examples demonstrate how are the format specifiers rewritten to the output.

Create Date Time 2008-03-09 16:05:07.123 datetime dt = new DateTime (2008, 3, 9, 16, 5, 7, 123); String.Format ("{0:y yy yyy yyyy}", DT); "8 008 2008" Year String.Format ("{0:m MM MMM MMMM}", DT); "3 Mar March" Month String.Format ("{0:d dd ddd dddd}", DT); "9 Sun Sunday" Day String.Format ("{0:h hh H hh}", DT); "4" Hour 12/24 String.Format ("{0:m mm}", DT); "5" Minute String.Format ("{0:s ss}", DT); "7 Modified" second String.Format ("{0:f ff FFF FFFF}", DT); "1 123 1230" Sec.fraction String.Format ("{0:f FF FFF FFFF}", DT); "1 123 123" Without zeroes String.Format ("{0:t tt}", DT); "P PM" a.m. or p.m. String.Format ("{0:z zz zzz}", DT); " -6-06-06:00" time zone

can use also date separator /(slash) and time sepatator : (colon). These characters is rewritten to characters defined in the current Datetimeformatinfo.dateseparator and datetimefor Matinfo.timeseparator.

Date separator in German culture is "." (So "/" changes to ".") String.Format ("{0:d/m/yyyy HH:mm:ss}", DT); "9/3/2008 16:05:07"-中文版 (en-US) String.Format ("{0:d/m/yyyy HH:mm:ss}", DT); "9.3.2008 16:05:07"-German (De-de)

Here are some examples of the custom date and time formatting:

[C #]

Month/day numbers Without/with leading zeroes String.Format ("{0:m/d/yyyy}", DT); "3/9/2008" String.Format ("{0:mm/dd/yyyy}", DT); "03/09/2008"//Day/month names String.Format ("{0:ddd, MMM D, yyyy}", DT); "Sun, Mar 9, 2008" String.Format ("{0:dddd, MMMM D, yyyy}", DT); "Sunday, March 9, 2008"//two/four digit year String.Format ("{0:mm/dd/yy}", DT); "03/09/08" String.Format ("{0:mm/dd/yyyy}", DT); "03/09/2008"

Standard DateTime Formatting

In DateTimeFormatInfo there are defined standard to patterns for the current culture. For example property Shorttimepattern are string that contains value h:mm tt for en -US culture and value hh:mm for de-de culture.

Following table shows patterns defined in DateTimeFormatInfo and their values for en-US culture. The contains format specifiers to the String.Format method.

specifier	DateTimeFormatInfo Property	pattern value (for en-US culture)
T	Shorttimepattern	h:mm tt
D	Shortdatepat Tern	m/d/yyyy
T	Longtimepattern	H:mm:ss tt
D	Longdatepattern	dddd, MMMM dd, yyyy
F	(combination of D and T)	dddd, MMMM dd, yyyy h:mm TT
F	Fulldatetimepattern	dddd, MMMM dd, yyyy h:mm:ss TT td>
G	(combination of-