Csharp/CSharp Tutorial/Date Time/DateTime Format

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Culture-insensitive DateTime format strings

Format string            Meaning                  Sample output                                
o                        Round-trippable          2010-01-02T17:11:30.0000000                  
r, R                     RFC 1123 standard        Sun, 02 Jan 2000 17:11:30 GMT                
s                        Sortable; ISO 8601       2010-01-02T17:11:30                          
u                        "Universal" Sortable     2010-01-02 17:11:30Z                         
U                        UTC                      Sunday, 02 January 2000 08:11:30

Culture-sensitive DateTime format strings

Format string          Meaning                      Sample output
d                      Short date                   01/02/2010
D                      Long date                    Sunday, 02 January 2010
t                      Short time                   17:18
T                      Long time                    17:18:19
f                      Long date + short time       Sunday, 02 January 2010 17:18
F                      Long date + long time        Sunday, 02 January 2010 17:18:19
g                      Short date + short time      01/02/2010 17:18
G (default)            Short date + long time       01/02/2010 17:18:19
m, M                   Month and day                January 02
y, Y                   Year and month               2010 January

DateTime Formatting

Format Character       Format Pattern                               Associated Property/ Description
D                      MM/dd/yyyy                                   ShortDatePattern
D                      dddd, MMMM dd, yyyy                          LongDatePattern
F                      dddd, MMMM dd, yyyy HH:mm                    Full date and time 
F                      dddd, MMMM dd, yyyy HH:mm:ss                 FullDateTimePattern
G                      MM/dd/yyyy HH:mm                             General 
G                      MM/dd/yyyy HH:mm:ss                          General 
M, M                   MMMM dd                                      MonthDayPattern
r, R                   ddd, dd MMM yyyy HH":"mm":"ss "GMT"          RFC1123Pattern
S                      yyyy-MM-dd HH:mm:ss                          SortableDateTimePattern using local time
T                      HH:mm                                        ShortTimePattern
T                      HH:mm:ss                                     LongTimePattern
U                      yyyy-MM-dd HH:mm:ss                          UniversalSortableDateTimePattern using universal time
U                      dddd, MMMM dd, yyyy HH:mm:ss                 UniversalSortableDateTimePattern
y, Y                   MMMM, yyyy                                   YearMonthPattern

Format time and date: {0:hh:mm tt}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("Time is {0:hh:mm tt}", dt); 
  } 
}
Time is 01:53 PM

Format time and date: 24 hour time is {0:HH:mm}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("24 hour time is {0:HH:mm}", dt); 
  } 
}
24 hour time is 13:53

Format time and date: Date is {0:ddd MMM dd, yyyy}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("Date is {0:ddd MMM dd, yyyy}", dt); 
  } 
}
Date is Sun Mar 25, 2007

Format time and date: Date is {0:gg}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("Era: {0:gg}", dt); 
  } 
}
Era: A.D.

Format time and date information.

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; // obtain current time 
 
    Console.WriteLine("d format: {0:d}", dt); 
    Console.WriteLine("D format: {0:D}", dt); 
 
    Console.WriteLine("t format: {0:t}", dt); 
    Console.WriteLine("T format: {0:T}", dt); 
 
    Console.WriteLine("f format: {0:f}", dt); 
    Console.WriteLine("F format: {0:F}", dt); 
 
    Console.WriteLine("g format: {0:g}", dt); 
    Console.WriteLine("G format: {0:G}", dt); 
 
    Console.WriteLine("m format: {0:m}", dt); 
    Console.WriteLine("M format: {0:M}", dt); 
 
    Console.WriteLine("r format: {0:r}", dt); 
    Console.WriteLine("R format: {0:R}", dt); 
 
    Console.WriteLine("s format: {0:s}", dt); 
 
    Console.WriteLine("u format: {0:u}", dt); 
    Console.WriteLine("U format: {0:U}", dt); 
 
    Console.WriteLine("y format: {0:y}", dt); 
    Console.WriteLine("Y format: {0:Y}", dt); 
  } 
}
d format: 25/03/2007
D format: March 25, 2007
t format: 1:53 PM
T format: 1:53:55 PM
f format: March 25, 2007 1:53 PM
F format: March 25, 2007 1:53:55 PM
g format: 25/03/2007 1:53 PM
G format: 25/03/2007 1:53:55 PM
m format: March 25
M format: March 25
r format: Sun, 25 Mar 2007 13:53:55 GMT
R format: Sun, 25 Mar 2007 13:53:55 GMT
s format: 2007-03-25T13:53:55
u format: 2007-03-25 13:53:55Z
U format: March 25, 2007 8:53:55 PM
y format: March, 2007
Y format: March, 2007

Format time and date: Time with seconds{0:HH:mm:ss tt}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("Time with seconds: " + "{0:HH:mm:ss tt}", dt); 
  } 
}
Time with seconds: 13:53:57 PM

Format time and date: Use m for day of month{0:m}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("Use m for day of month: {0:m}", dt); 
  } 
}
Use m for day of month: March 25

Format time and date: use m for minutes: {0:%m}

using System;  
  
class MainClass {  
  public static void Main() {  
    DateTime dt = DateTime.Now; 
 
    Console.WriteLine("use m for minutes: {0:%m}", dt); 
  } 
}
use m for minutes: 53

Pre-built date/time specifiers

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;
using System.Security.Cryptography;
public class MainClass
{
    public static void Main()
    {
        DateTime dt1 = new DateTime(2004, 10, 9, 22, 47, 35, 259);
        DateTimeFormatInfo di = new DateTimeFormatInfo();
        for (char c = "a"; c <= "z"; c++)
        {
            try
            {
                foreach (string s in di.GetAllDateTimePatterns(c))
                {
                    Console.WriteLine(""{0}": {1} - {2}/{3}", c, s,
                        dt1.ToString(c.ToString()), dt1.ToString(s));
                }
                char cUpper = Char.ToUpper(c);
                foreach (string s in di.GetAllDateTimePatterns(cUpper))
                {
                    Console.WriteLine(""{0}": {1} - {2}", cUpper, s,
                        dt1.ToString(cUpper.ToString()), dt1.ToString(s));
                }
            }
            catch (ArgumentException)
            {
                // Ignore--specifier not found.
            }
        }
    }
}
"d": MM/dd/yyyy - 09/10/2004/10/09/2004
"D": dddd, dd MMMM yyyy - October 9, 2004
"f": dddd, dd MMMM yyyy HH:mm - October 9, 2004 10:47 PM/Saturday, 09 October 2004 22:47
"f": dddd, dd MMMM yyyy hh:mm tt - October 9, 2004 10:47 PM/Saturday, 09 October 2004 10:47 PM
"f": dddd, dd MMMM yyyy H:mm - October 9, 2004 10:47 PM/Saturday, 09 October 2004 22:47
"f": dddd, dd MMMM yyyy h:mm tt - October 9, 2004 10:47 PM/Saturday, 09 October 2004 10:47 PM
"F": dddd, dd MMMM yyyy HH:mm:ss - October 9, 2004 10:47:35 PM
"g": MM/dd/yyyy HH:mm - 09/10/2004 10:47 PM/10/09/2004 22:47
"g": MM/dd/yyyy hh:mm tt - 09/10/2004 10:47 PM/10/09/2004 10:47 PM
"g": MM/dd/yyyy H:mm - 09/10/2004 10:47 PM/10/09/2004 22:47
"g": MM/dd/yyyy h:mm tt - 09/10/2004 10:47 PM/10/09/2004 10:47 PM
"G": MM/dd/yyyy HH:mm:ss - 09/10/2004 10:47:35 PM
"m": MMMM dd - October 09/October 09
"M": MMMM dd - October 09
"o": yyyy"-"MM"-"dd"T"HH":"mm":"ss.fffffffK - 2004-10-09T22:47:35.2590000/2004-10-09T22:47:35.259000
0
"O": yyyy"-"MM"-"dd"T"HH":"mm":"ss.fffffffK - 2004-10-09T22:47:35.2590000
"r": ddd, dd MMM yyyy HH":"mm":"ss "GMT" - Sat, 09 Oct 2004 22:47:35 GMT/Sat, 09 Oct 2004 22:47:35 G
MT
"R": ddd, dd MMM yyyy HH":"mm":"ss "GMT" - Sat, 09 Oct 2004 22:47:35 GMT
"s": yyyy"-"MM"-"dd"T"HH":"mm":"ss - 2004-10-09T22:47:35/2004-10-09T22:47:35
"t": HH:mm - 10:47 PM/22:47
"t": hh:mm tt - 10:47 PM/10:47 PM
"t": H:mm - 10:47 PM/22:47
"t": h:mm tt - 10:47 PM/10:47 PM
"T": HH:mm:ss - 10:47:35 PM
"u": yyyy"-"MM"-"dd HH":"mm":"ss"Z" - 2004-10-09 22:47:35Z/2004-10-09 22:47:35Z
"U": dddd, dd MMMM yyyy HH:mm:ss - October 10, 2004 5:47:35 AM
"y": yyyy MMMM - October, 2004/2004 October
"Y": yyyy MMMM - October, 2004

Use the ToLongDateString() and ToShortDateString() methods to convert the date parts of a DateTime to long and short date strings

using System;
class MainClass
{
  public static void Main()
  {
    DateTime myDateTime11 = new DateTime(2004, 1, 15, 23, 2, 5);
    Console.WriteLine("myDateTime11 = " + myDateTime11);
    Console.WriteLine("myDateTime11.ToLongDateString() = " + myDateTime11.ToLongDateString());
    Console.WriteLine("myDateTime11.ToShortDateString() = " + myDateTime11.ToShortDateString());

  }
}
myDateTime11 = 15/01/2004 11:02:05 PM
myDateTime11.ToLongDateString() = January 15, 2004
myDateTime11.ToShortDateString() = 15/01/2004

Use the ToLongTimeString() and ToShortTimeString() methods to convert the time parts of a DateTime to long and short time strings

using System;
class MainClass
{
  public static void Main()
  {
    DateTime myDateTime11 = new DateTime(2004, 1, 15, 23, 2, 5);
    Console.WriteLine("myDateTime11 = " + myDateTime11);
    Console.WriteLine("myDateTime11.ToLongTimeString() = " +  myDateTime11.ToLongTimeString());
    Console.WriteLine("myDateTime11.ToShortTimeString() = " +  myDateTime11.ToShortTimeString());
  }
}
myDateTime11 = 15/01/2004 11:02:05 PM
myDateTime11.ToLongTimeString() = 11:02:05 PM
myDateTime11.ToShortTimeString() = 11:02 PM

Use the ToString() method to convert a DateTime to a string: d, D, f, F, g, G, m ,r, s, t,T, u, U, y

using System;
class MainClass
{
  public static void Main()
  {
    DateTime myDateTime = new DateTime(2004, 1, 12, 22, 2, 10);
    Console.WriteLine("myDateTime.ToString() = " + myDateTime.ToString());
    Console.WriteLine("myDateTime.ToString(\"d\") = " + myDateTime.ToString("d"));
    Console.WriteLine("myDateTime.ToString(\"D\") = " + myDateTime.ToString("D"));
    Console.WriteLine("myDateTime.ToString(\"f\") = " + myDateTime.ToString("f"));
    Console.WriteLine("myDateTime.ToString(\"F\") = " + myDateTime.ToString("F"));
    Console.WriteLine("myDateTime.ToString(\"g\") = " + myDateTime.ToString("g"));
    Console.WriteLine("myDateTime.ToString(\"G\") = " + myDateTime.ToString("G"));
    Console.WriteLine("myDateTime.ToString(\"m\") = " + myDateTime.ToString("m"));
    Console.WriteLine("myDateTime.ToString(\"r\") = " + myDateTime.ToString("r"));
    Console.WriteLine("myDateTime.ToString(\"s\") = " + myDateTime.ToString("s"));
    Console.WriteLine("myDateTime.ToString(\"t\") = " + myDateTime.ToString("t"));
    Console.WriteLine("myDateTime.ToString(\"T\") = " + myDateTime.ToString("T"));
    Console.WriteLine("myDateTime.ToString(\"u\") = " + myDateTime.ToString("u"));
    Console.WriteLine("myDateTime.ToString(\"U\") = " + myDateTime.ToString("U"));
    Console.WriteLine("myDateTime.ToString(\"y\") = " + myDateTime.ToString("y"));
  }
}
myDateTime.ToString() = 12/01/2004 10:02:10 PM
myDateTime.ToString("d") = 12/01/2004
myDateTime.ToString("D") = January 12, 2004
myDateTime.ToString("f") = January 12, 2004 10:02 PM
myDateTime.ToString("F") = January 12, 2004 10:02:10 PM
myDateTime.ToString("g") = 12/01/2004 10:02 PM
myDateTime.ToString("G") = 12/01/2004 10:02:10 PM
myDateTime.ToString("m") = January 12
myDateTime.ToString("r") = Mon, 12 Jan 2004 22:02:10 GMT
myDateTime.ToString("s") = 2004-01-12T22:02:10
myDateTime.ToString("t") = 10:02 PM
myDateTime.ToString("T") = 10:02:10 PM
myDateTime.ToString("u") = 2004-01-12 22:02:10Z
myDateTime.ToString("U") = January 13, 2004 6:02:10 AM
myDateTime.ToString("y") = January, 2004

Use the ToString() method to convert a DateTime to a string: MMMM dd, yyyy

using System;
class MainClass
{
  public static void Main()
  {
    DateTime myDateTime = new DateTime(2004, 1, 12, 22, 2, 10);
    Console.WriteLine("myDateTime.ToString() = " + myDateTime.ToString());
    Console.WriteLine("myDateTime.ToString(\"MMMM dd, yyyy\") = " + myDateTime.ToString("MMMM dd, yyyy"));
  }
}
myDateTime.ToString() = 12/01/2004 10:02:10 PM
myDateTime.ToString("MMMM dd, yyyy") = January 12, 2004
Источник — «http://nfex.ru/index.php?title=Csharp/CSharp_Tutorial/Date_Time/DateTime_Format&oldid=6589»