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Showing content from https://docs.microsoft.com/en-us/dotnet/api/system.datetimeoffset.tostring below:

DateTimeOffset.ToString Method (System) | Microsoft Learn

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Converts the value of the current DateTimeOffset object to its equivalent string representation using the specified format.

public:
 System::String ^ ToString(System::String ^ format);

public string ToString(string format);

public string ToString(string? format);

override this.ToString : string -> string

Public Function ToString (format As String) As String

Parameters

format: String

A format string.

Returns

A string representation of the value of the current DateTimeOffset object, as specified by format.

Exceptions

The length of format is one, and it is not one of the standard format specifier characters defined for DateTimeFormatInfo.

-or-

format does not contain a valid custom format pattern.

The date and time is outside the range of dates supported by the calendar used by the current culture.

Examples

The following example displays a DateTimeOffset object to the console using each of the standard date and time format specifiers. The output is formatted by using the en-us culture.

DateTimeOffset outputDate = new DateTimeOffset(2007, 10, 31, 21, 0, 0,
                                     new TimeSpan(-8, 0, 0));
string specifier;

// Output date using each standard date/time format specifier
specifier = "d";
// Displays   d: 10/31/2007
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "D";
// Displays   D: Wednesday, October 31, 2007
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "t";
// Displays   t: 9:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "T";
// Displays   T: 9:00:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "f";
// Displays   f: Wednesday, October 31, 2007 9:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "F";
// Displays   F: Wednesday, October 31, 2007 9:00:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "g";
// Displays   g: 10/31/2007 9:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "G";
// Displays   G: 10/31/2007 9:00:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "M";           // 'm' is identical
// Displays   M: October 31
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "R";           // 'r' is identical
// Displays   R: Thu, 01 Nov 2007 05:00:00 GMT
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "s";
// Displays   s: 2007-10-31T21:00:00
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

specifier = "u";
// Displays   u: 2007-11-01 05:00:00Z
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

// Specifier is not supported
specifier = "U";
try
{
   Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));
}
catch (FormatException)
{
   Console.WriteLine("{0}: Not supported.", specifier);
}

specifier = "Y";         // 'y' is identical
// Displays   Y: October, 2007
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier));

let outputDate = DateTimeOffset(2007, 10, 31, 21, 0, 0, TimeSpan(-8, 0, 0))

// Output date using each standard date/time format specifier
let specifier = "d"
// Displays   d: 10/31/2007
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "D"
// Displays   D: Wednesday, October 31, 2007
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "t"
// Displays   t: 9:00 PM
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "T"
// Displays   T: 9:00:00 PM
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "f"
// Displays   f: Wednesday, October 31, 2007 9:00 PM
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "F"
// Displays   F: Wednesday, October 31, 2007 9:00:00 PM
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "g"
// Displays   g: 10/31/2007 9:00 PM
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "G"
// Displays   G: 10/31/2007 9:00:00 PM
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "M"           // 'm' is identical
// Displays   M: October 31
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "R"           // 'r' is identical
// Displays   R: Thu, 01 Nov 2007 05:00:00 GMT
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "s"
// Displays   s: 2007-10-31T21:00:00
printfn $"{specifier}: {outputDate.ToString specifier}"

let specifier = "u"
// Displays   u: 2007-11-01 05:00:00Z
printfn $"{specifier}: {outputDate.ToString specifier}"

// Specifier is not supported
let specifier = "U"
try
    printfn $"{specifier}: {outputDate.ToString specifier}"
with :? FormatException ->
    printfn $"{specifier}: Not supported."

let specifier = "Y"         // 'y' is identical
// Displays   Y: October, 2007
printfn $"{specifier}: {outputDate.ToString specifier}"

Dim outputDate As New DateTimeOffset(#10/31/2007 9:00PM#, _
                                     New TimeSpan(-8, 0, 0))
Dim specifier As String 
      
' Output date using each standard date/time format specifier
specifier = "d"
' Displays   d: 10/31/2007
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "D"
' Displays   D: Wednesday, October 31, 2007
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "t"
' Displays   t: 9:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "T"
' Displays   T: 9:00:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "f"
' Displays   f: Wednesday, October 31, 2007 9:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "F"
' Displays   F: Wednesday, October 31, 2007 9:00:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "g"
' Displays   g: 10/31/2007 9:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "G"
' Displays   G: 10/31/2007 9:00:00 PM
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "M"           ' 'm' is identical
' Displays   M: October 31
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "R"           ' 'r' is identical
' Displays   R: Thu, 01 Nov 2007 05:00:00 GMT
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "s"
' Displays   s: 2007-10-31T21:00:00
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

specifier = "u"
' Displays   u: 2007-11-01 05:00:00Z
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 

' Specifier is not supported
specifier = "U"
Try
   Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier)) 
Catch e As FormatException
   Console.WriteLine("{0}: Not supported.", specifier)   
End Try

specifier = "Y"         ' 'y' is identical
' Displays   Y: October, 2007
Console.WriteLine("{0}: {1}", specifier, outputDate.ToString(specifier))

Remarks

The format parameter should contain either a single format specifier character (see Standard Date and Time Format Strings) or a custom format pattern (see Custom Date and Time Format Strings) that defines the format of the returned string. If format is a null or empty string (""), the DateTimeOffset value is output using the default format.

The following table shows the exact operation of certain format specifiers when used with DateTimeOffset, which differs from their behavior when used with DateTime.

Existing format specifier New behavior "K" Designed to round-trip a date and time. With DateTimeOffset, maps to "zzz" (the offset is always displayed with hours and minutes). Note that "K" is a custom format specifier; it cannot appear as the single character in format. "U" Not supported. "r" Converts the DateTimeOffset object to Coordinated Universal Time (UTC) and outputs it using the custom format string ddd, dd MMM yyyy HH:mm:ss GMT. "u" Converts the DateTimeOffset object to UTC and outputs it using the format yyyy-MM-dd HH:mm:ssZ.

The remaining standard date and time format specifiers behave the same with the ToString(String) method as they do with the ToString method.

This method uses formatting information derived from the current culture. For more information, see CurrentCulture.

Notes to Callers

The ToString(String) method returns the string representation of the date and time in the calendar used by the current culture. If the value of the current DateTimeOffset instance is earlier than MinSupportedDateTime or later than MaxSupportedDateTime, the method throws an ArgumentOutOfRangeException. The following example provides an illustration. It attempts to format a date that is outside the range of the HebrewCalendar class when the current culture is Hebrew (Israel).

using System;
using System.Globalization;
using System.Threading;

public class Example
{
   public static void Main()
   {
      DateTimeOffset date1 = new DateTimeOffset(new DateTime(1550, 7, 21),
                                                TimeSpan.Zero);
      CultureInfo dft;
      CultureInfo heIL = new CultureInfo("he-IL");
      heIL.DateTimeFormat.Calendar = new HebrewCalendar();

      // Change current culture to he-IL.
      dft = Thread.CurrentThread.CurrentCulture;
      Thread.CurrentThread.CurrentCulture = heIL;

      // Display the date using the current culture's calendar.
      try {
         Console.WriteLine(date1.ToString("G"));
      }
      catch (ArgumentOutOfRangeException) {
         Console.WriteLine("{0} is earlier than {1} or later than {2}",
                           date1.ToString("d", CultureInfo.InvariantCulture),
                           heIL.DateTimeFormat.Calendar.MinSupportedDateTime.ToString("d", CultureInfo.InvariantCulture),
                           heIL.DateTimeFormat.Calendar.MaxSupportedDateTime.ToString("d", CultureInfo.InvariantCulture));
      }

      // Restore the default culture.
      Thread.CurrentThread.CurrentCulture = dft;
   }
}
// The example displays the following output:
//    07/21/1550 is earlier than 01/01/1583 or later than 09/29/2239

open System
open System.Globalization
open System.Threading

let date1 = DateTimeOffset(DateTime(1550, 7, 21), TimeSpan.Zero)

let heIL = CultureInfo "he-IL"
heIL.DateTimeFormat.Calendar <- HebrewCalendar()

// Change current culture to he-IL.
let dft = Thread.CurrentThread.CurrentCulture
Thread.CurrentThread.CurrentCulture <- heIL

// Display the date using the current culture's calendar.
try
    printfn $"{date1:G}"
with :? ArgumentOutOfRangeException ->
    printfn $"""{date1.ToString("d", CultureInfo.InvariantCulture)} is earlier than {heIL.DateTimeFormat.Calendar.MinSupportedDateTime.ToString("d", CultureInfo.InvariantCulture)} or later than {heIL.DateTimeFormat.Calendar.MaxSupportedDateTime.ToString("d", CultureInfo.InvariantCulture)}"""

// Restore the default culture.
Thread.CurrentThread.CurrentCulture <- dft

// The example displays the following output:
//    07/21/1550 is earlier than 01/01/1583 or later than 09/29/2239

Imports System.Globalization
Imports System.Threading

Module Example
   Public Sub Main()
      Dim date1 As New DateTimeOffset(#7/21/1550#, TimeSpan.Zero)
      Dim dft As CultureInfo
      Dim heIL As New CultureInfo("he-IL")
      heIL.DateTimeFormat.Calendar = New HebrewCalendar()
      
      ' Change current culture to he-IL.
      dft = Thread.CurrentThread.CurrentCulture
      Thread.CurrentThread.CurrentCulture = heIL
      
      ' Display the date using the current culture's calendar.            
      Try
         Console.WriteLine(date1.ToString("G"))
      Catch e As ArgumentOutOfRangeException
         Console.WriteLine("{0} is earlier than {1} or later than {2}", _
                           date1.ToString("d", CultureInfo.InvariantCulture), _
                           heIL.DateTimeFormat.Calendar.MinSupportedDateTime.ToString("d", CultureInfo.InvariantCulture), _ 
                           heIL.DateTimeFormat.Calendar.MaxSupportedDateTime.ToString("d", CultureInfo.InvariantCulture)) 
      End Try
      
      ' Restore the default culture.
      Thread.CurrentThread.CurrentCulture = dft
   End Sub
End Module
' The example displays the following output:
'    07/21/1550 is earlier than 01/01/1583 or later than 09/29/2239