DateTimeOffset.ToString 方法

参考

定义

命名空间:: System

程序集:: System.Runtime.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

将当前 DateTimeOffset 对象的值转换为其等效的字符串表示形式。

重载

ToString()	将当前 DateTimeOffset 对象的值转换为其等效的字符串表示形式。
ToString(IFormatProvider)	使用指定的区域性特定格式设置信息将当前 DateTimeOffset 对象的值转换为它的等效字符串表示形式。
ToString(String)	使用指定的格式将当前 DateTimeOffset 对象的值转换为它的等效字符串表示形式。
ToString(String, IFormatProvider)	使用指定的格式和区域性特定格式信息将当前 DateTimeOffset 对象的值转换为它的等效字符串表示形式。

ToString()

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

将当前 DateTimeOffset 对象的值转换为其等效的字符串表示形式。

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

public override string ToString ();

override this.ToString : unit -> string

Public Overrides Function ToString () As String

String

一个 DateTimeOffset 对象的字符串表示形式，并在字符串末尾追加了偏移量。

例外

ArgumentOutOfRangeException

此日期和时间超出了当前区域性所用日历支持的日期范围。

示例

以下示例演示了对方法的调用， ToString() 并在当前区域性为 en-us 的系统上显示其输出。

DateTimeOffset thisDate;

// Show output for UTC time
thisDate = DateTimeOffset.UtcNow;
Console.WriteLine(thisDate.ToString());  // Displays 3/28/2007 7:13:50 PM +00:00

// Show output for local time
thisDate = DateTimeOffset.Now;
Console.WriteLine(thisDate.ToString());  // Displays 3/28/2007 12:13:50 PM -07:00

// Show output for arbitrary time offset
thisDate = thisDate.ToOffset(new TimeSpan(-5, 0, 0));
Console.WriteLine(thisDate.ToString());  // Displays 3/28/2007 2:13:50 PM -05:00

// Show output for UTC time
let thisDate = DateTimeOffset.UtcNow
printfn $"{thisDate.ToString()}"  // Displays 3/28/2007 7:13:50 PM +00:00

// Show output for local time
let thisDate = DateTimeOffset.Now
printfn $"{thisDate.ToString()}"  // Displays 3/28/2007 12:13:50 PM -07:00

// Show output for arbitrary time offset
let thisDate = thisDate.ToOffset(TimeSpan(-5, 0, 0))
printfn $"{thisDate.ToString()}"  // Displays 3/28/2007 2:13:50 PM -05:00

Dim thisDate As DateTimeOffset

' Show output for UTC time
thisDate = DateTimeOffset.UtcNow
Console.WriteLine(thisDate.ToString())  ' Displays 3/28/2007 7:13:50 PM +00:00

' Show output for local time 
thisDate = DateTimeOffset.Now
Console.WriteLine(thisDate.ToString())  ' Displays 3/28/2007 12:13:50 PM -07:00

' Show output for arbitrary time offset
thisDate = thisDate.ToOffset(new TimeSpan(-5, 0, 0))
Console.WriteLine(thisDate.ToString())  ' Displays 3/28/2007 2:13:50 PM -05:00

注解

此方法的返回值与方法的 DateTime.ToString() 返回值相同，只不过它包含一个空格，后跟字符串末尾追加的偏移量。换句话说，它使用短日期模式、长时间模式和 zzz 自定义格式字符串设置输出格式，每个元素与前一个元素之间用空格分隔。例如，如果 DateTime.ToString() 返回值 1/12/2008 6：15：50 PM， ToString() 则返回值 1/12/2008 6：15：50 PM -08：00，时间晚于协调世界时 (UTC) 8 小时。

此方法使用派生自当前区域性的格式设置信息。有关详细信息，请参阅 CurrentCulture。方法的其他重载 ToString 使你能够指定其格式要使用的区域性，并定义值的输出模式 DateTimeOffset 。

调用方说明

方法 ToString() 返回当前区域性使用的日历中日期和时间的字符串表示形式。如果当前 DateTimeOffset 实例的值早于 MinSupportedDateTime 或晚于 MaxSupportedDateTime，则方法将 ArgumentOutOfRangeException引发。下面的示例进行了这方面的演示。当当前区域性为阿拉伯语 (叙利亚) 时，它会尝试设置类范围 HijriCalendar 之外的日期的格式。

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

public class Example
{
   public static void Main()
   {
      DateTimeOffset date1 = new DateTimeOffset(new DateTime(550, 1, 1),
                                                TimeSpan.Zero);
      CultureInfo dft;
      CultureInfo arSY = new CultureInfo("ar-SY");
      arSY.DateTimeFormat.Calendar = new HijriCalendar();

      // Change current culture to ar-SY.
      dft = Thread.CurrentThread.CurrentCulture;
      Thread.CurrentThread.CurrentCulture = arSY;

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

      // Restore the default culture.
      Thread.CurrentThread.CurrentCulture = dft;
   }
}
// The example displays the following output:
//    01/01/0550 is earlier than 07/18/0622 or later than 12/31/9999

open System
open System.Globalization
open System.Threading

let date1 = DateTimeOffset(DateTime(550, 1, 1), TimeSpan.Zero)

let arSY = CultureInfo "ar-SY"
arSY.DateTimeFormat.Calendar <- HijriCalendar()

// Change current culture to ar-SY.
let dft = Thread.CurrentThread.CurrentCulture
Thread.CurrentThread.CurrentCulture <- arSY

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

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

// The example displays the following output:
//    01/01/0550 is earlier than 07/18/0622 or later than 12/31/9999

Imports System.Globalization
Imports System.Threading

Module Example
   Public Sub Main()
      Dim date1 As New DateTimeOffset(#1/1/550#, TimeSpan.Zero)
      Dim dft As CultureInfo
      Dim arSY As New CultureInfo("ar-SY")
      arSY.DateTimeFormat.Calendar = New HijriCalendar()
      
      ' Change current culture to ar-SY.
      dft = Thread.CurrentThread.CurrentCulture
      Thread.CurrentThread.CurrentCulture = arSY
      
      ' Display the date using the current culture's calendar.            
      Try
         Console.WriteLine(date1.ToString())
      Catch e As ArgumentOutOfRangeException
         Console.WriteLine("{0} is earlier than {1:d} or later than {2:d}", _
                           date1.ToString("d", CultureInfo.InvariantCulture), _
                           arSY.DateTimeFormat.Calendar.MinSupportedDateTime.ToString("d", CultureInfo.InvariantCulture), _ 
                           arSY.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:
'    01/01/0550 is earlier than 07/18/0622 or later than 12/31/9999

适用于

ToString(IFormatProvider)

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

使用指定的区域性特定格式设置信息将当前 DateTimeOffset 对象的值转换为它的等效字符串表示形式。

public:
 System::String ^ ToString(IFormatProvider ^ formatProvider);

public string ToString (IFormatProvider formatProvider);

public string ToString (IFormatProvider? formatProvider);

override this.ToString : IFormatProvider -> string

Public Function ToString (formatProvider As IFormatProvider) As String

参数

formatProvider: IFormatProvider

一个提供区域性特定的格式设置信息的对象。

String

由 formatProvider 指定的当前 DateTimeOffset 对象值的字符串表示形式。

例外

ArgumentOutOfRangeException

日期和时间超出了 formatProvider 所用日历支持的日期范围。

示例

以下示例使用CultureInfo表示固定区域性的对象以及四个DateTimeOffset其他区域性显示对象。

CultureInfo[] cultures = new CultureInfo[] {CultureInfo.InvariantCulture,
                                           new CultureInfo("en-us"),
                                           new CultureInfo("fr-fr"),
                                           new CultureInfo("de-DE"),
                                           new CultureInfo("es-ES")};

DateTimeOffset thisDate = new DateTimeOffset(2007, 5, 1, 9, 0, 0,
                                             TimeSpan.Zero);

foreach (CultureInfo culture in cultures)
{
   string cultureName;
   if (string.IsNullOrEmpty(culture.Name))
      cultureName = culture.NativeName;
   else
      cultureName = culture.Name;

   Console.WriteLine("In {0}, {1}",
                     cultureName, thisDate.ToString(culture));
}
// The example produces the following output:
//    In Invariant Language (Invariant Country), 05/01/2007 09:00:00 +00:00
//    In en-US, 5/1/2007 9:00:00 AM +00:00
//    In fr-FR, 01/05/2007 09:00:00 +00:00
//    In de-DE, 01.05.2007 09:00:00 +00:00
//    In es-ES, 01/05/2007 9:00:00 +00:00

let cultures = 
    [| CultureInfo.InvariantCulture
       CultureInfo "en-us"
       CultureInfo "fr-fr"
       CultureInfo "de-DE"
       CultureInfo "es-ES" |]

let thisDate = DateTimeOffset(2007, 5, 1, 9, 0, 0, TimeSpan.Zero)

for culture in cultures do
    let cultureName = 
        if String.IsNullOrEmpty culture.Name then
            culture.NativeName
        else
            culture.Name
    printfn $"In {cultureName}, {thisDate.ToString culture}"

// The example produces the following output:
//    In Invariant Language (Invariant Country), 05/01/2007 09:00:00 +00:00
//    In en-US, 5/1/2007 9:00:00 AM +00:00
//    In fr-FR, 01/05/2007 09:00:00 +00:00
//    In de-DE, 01.05.2007 09:00:00 +00:00
//    In es-ES, 01/05/2007 9:00:00 +00:00

     Dim cultures() As CultureInfo = {CultureInfo.InvariantCulture, _
                                      New CultureInfo("en-us"), _
                                      New CultureInfo("fr-fr"), _
                                      New CultureInfo("de-DE"), _
                                      New CultureInfo("es-ES")}

     Dim thisDate As New DateTimeOffset(#5/1/2007 9:00AM#, TimeSpan.Zero)                                            

     For Each culture As CultureInfo In cultures
        Dim cultureName As String 
        If String.IsNullOrEmpty(culture.Name) Then
           cultureName = culture.NativeName
        Else
           cultureName = culture.Name
        End If
        Console.WriteLine("In {0}, {1}", _
                          cultureName, thisDate.ToString(culture))
     Next                                            
     ' The example produces the following output:
     '    In Invariant Language (Invariant Country), 05/01/2007 09:00:00 +00:00
     '    In en-US, 5/1/2007 9:00:00 AM +00:00
     '    In fr-FR, 01/05/2007 09:00:00 +00:00
     '    In de-DE, 01.05.2007 09:00:00 +00:00
     '    In es-ES, 01/05/2007 9:00:00 +00:00

注解

此方法的返回值与方法的等效重载 DateTime.ToString 相同，只不过它包含一个空格，后跟字符串末尾追加的偏移量。换句话说，它使用短日期模式、长时间模式和 zzz 自定义格式字符串设置输出格式，每个元素与前一个元素之间用空格分隔。

这三个元素的格式由 formatProvider 参数定义。参数 formatProvider 可以是以下任一参数：

一个 CultureInfo 对象，表示其格式约定应用于返回的字符串的区域性。 DateTimeFormatInfo属性返回CultureInfo.DateTimeFormat的对象定义返回的字符串的格式。
一个 DateTimeFormatInfo 定义日期和时间数据格式的对象。

如果 formatProvider 为 null，则 DateTimeFormatInfo 使用与当前区域性关联的对象， (请参阅 CurrentCulture) 。

调用方说明

方法 ToString(IFormatProvider) 返回由参数表示的区域性使用的日历中日期和时间的 formatProvider 字符串表示形式。其日历由 Calendar 属性定义。如果当前 DateTimeOffset 实例的值早于 MinSupportedDateTime 或晚于 MaxSupportedDateTime，则方法将 ArgumentOutOfRangeException引发。下面的示例进行了这方面的演示。它尝试设置类范围 JapaneseCalendar 之外的日期的格式。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      CultureInfo jaJP = new CultureInfo("ja-JP");
      jaJP.DateTimeFormat.Calendar = new JapaneseCalendar();
      DateTimeOffset date1 = new DateTimeOffset(new DateTime(1867, 1, 1),
                                                TimeSpan.Zero);

      try {
         Console.WriteLine(date1.ToString(jaJP));
      }
      catch (ArgumentOutOfRangeException) {
         Console.WriteLine("{0:d} is earlier than {1:d} or later than {2:d}",
                           date1,
                           jaJP.DateTimeFormat.Calendar.MinSupportedDateTime,
                           jaJP.DateTimeFormat.Calendar.MaxSupportedDateTime);
      }
   }
}
// The example displays the following output:
//    1/1/1867 is earlier than 9/8/1868 or later than 12/31/9999

open System
open System.Globalization

let jaJP = CultureInfo "ja-JP"
jaJP.DateTimeFormat.Calendar <- JapaneseCalendar()
let date1 = DateTimeOffset(DateTime(1867, 1, 1), TimeSpan.Zero)

try
    printfn $"{date1.ToString jaJP}"
with :? ArgumentOutOfRangeException ->
    printfn $"{date1:d} is earlier than {jaJP.DateTimeFormat.Calendar.MinSupportedDateTime:d} or later than {jaJP.DateTimeFormat.Calendar.MaxSupportedDateTime:d}"

// The example displays the following output:
//    1/1/1867 is earlier than 9/8/1868 or later than 12/31/9999

Imports System.Globalization

Module Example
   Public Sub Main()
      Dim jaJP As New CultureInfo("ja-JP")
      jaJP.DateTimeFormat.Calendar = New JapaneseCalendar() 
      Dim date1 As New DateTimeOffset(#01/01/1867#, TimeSpan.Zero)

      Try
         Console.WriteLine(date1.ToString(jaJP))
      Catch e As ArgumentOutOfRangeException
         Console.WriteLine("{0:d} is earlier than {1:d} or later than {2:d}", _
                           date1, _
                           jaJP.DateTimeFormat.Calendar.MinSupportedDateTime, _ 
                           jaJP.DateTimeFormat.Calendar.MaxSupportedDateTime) 
      End Try
   End Sub
End Module
' The example displays the following output:
'    1/1/1867 is earlier than 9/8/1868 or later than 12/31/9999

适用于

ToString(String)

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

使用指定的格式将当前 DateTimeOffset 对象的值转换为它的等效字符串表示形式。

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

参数

format: String

一个格式字符串。

String

由 format 指定的当前 DateTimeOffset 对象值的字符串表示形式。

例外

FormatException

format 的长度为 1，它不属于为 DateTimeFormatInfo 定义的标准格式说明符字符。

- 或 -

format 不包含有效的自定义格式模式。

ArgumentOutOfRangeException

此日期和时间超出了当前区域性所用日历支持的日期范围。

示例

以下示例使用每个标准日期和时间格式说明符向控制台显示 DateTimeOffset 对象。使用 en-us 区域性设置输出格式。

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))

注解

参数 format 应包含单个格式说明符字符 (请参阅标准日期和时间格式字符串) 或自定义格式模式 (请参阅定义返回字符串格式的自定义日期和时间格式字符串) 。如果 format 为 null 或空字符串 (“”) ，则 DateTimeOffset 使用默认格式输出值。

下表显示了与一起使用 DateTimeOffset时某些格式说明符的确切操作，这与与与一起使用 DateTime时的行为不同。

现有格式说明符	新行为
“K”	旨在往返日期和时间。使用 DateTimeOffset，映射到“zzz” (偏移量始终以小时和分钟) 显示。请注意，“K”是自定义格式说明符;它不能显示为中的 `format`单个字符。
“U”	不支持。
“r”	将 DateTimeOffset 对象转换为协调世界时 (UTC) ，并使用自定义格式字符串 `ddd, dd MMM yyyy HH:mm:ss GMT`输出它。
“u”	将 DateTimeOffset 对象转换为 UTC，并使用格式 `yyyy-MM-dd HH:mm:ssZ`输出它。

剩余的标准日期和时间格式说明符与 ToString(String) 方法 ToString 的行为相同。

此方法使用派生自当前区域性的格式设置信息。有关详细信息，请参阅 CurrentCulture。

调用方说明

方法 ToString(String) 返回当前区域性使用的日历中日期和时间的字符串表示形式。如果当前 DateTimeOffset 实例的值早于 MinSupportedDateTime 或晚于 MaxSupportedDateTime，则方法将 ArgumentOutOfRangeException引发。下面的示例进行了这方面的演示。当当前区域性为希伯来语 (以色列) 时，它会尝试设置类范围 HebrewCalendar 之外的日期的格式。

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

另请参阅

适用于

ToString(String, IFormatProvider)

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

Source:: DateTimeOffset.cs

使用指定的格式和区域性特定格式信息将当前 DateTimeOffset 对象的值转换为它的等效字符串表示形式。

public:
 virtual System::String ^ ToString(System::String ^ format, IFormatProvider ^ formatProvider);

public string ToString (string format, IFormatProvider formatProvider);

public string ToString (string? format, IFormatProvider? formatProvider);

override this.ToString : string * IFormatProvider -> string

Public Function ToString (format As String, formatProvider As IFormatProvider) As String

参数

format: String

一个格式字符串。

formatProvider: IFormatProvider

一个提供区域性特定的格式设置信息的对象。

String

当前 DateTimeOffset 对象的值的字符串表示形式，由 format 和 provider 指定。

实现

ToString(String, IFormatProvider)

例外

FormatException

format 的长度为 1，它不属于为 DateTimeFormatInfo 定义的标准格式说明符字符。

- 或 -

format 不包含有效的自定义格式模式。

ArgumentOutOfRangeException

日期和时间超出了 formatProvider 所用日历支持的日期范围。

示例

以下示例使用 ToString(String, IFormatProvider) 方法显示使用 DateTimeOffset 自定义格式字符串的多个不同区域性的对象。

DateTimeOffset outputDate = new DateTimeOffset(2007, 11, 1, 9, 0, 0,
                                     new TimeSpan(-7, 0, 0));
string format = "dddd, MMM dd yyyy HH:mm:ss zzz";

// Output date and time using custom format specification
Console.WriteLine(outputDate.ToString(format, null as DateTimeFormatInfo));
Console.WriteLine(outputDate.ToString(format, CultureInfo.InvariantCulture));
Console.WriteLine(outputDate.ToString(format,
                                      new CultureInfo("fr-FR")));
Console.WriteLine(outputDate.ToString(format,
                                      new CultureInfo("es-ES")));
// The example displays the following output to the console:
//    Thursday, Nov 01 2007 09:00:00 -07:00
//    Thursday, Nov 01 2007 09:00:00 -07:00
//    jeudi, nov. 01 2007 09:00:00 -07:00
//    jueves, nov 01 2007 09:00:00 -07:00

let outputDate = DateTimeOffset(2007, 11, 1, 9, 0, 0, TimeSpan(-7, 0, 0))
let format = "dddd, MMM dd yyyy HH:mm:ss zzz"

// Output date and time using custom format specification
printfn $"{outputDate.ToString(format, null)}"
printfn $"{outputDate.ToString(format, CultureInfo.InvariantCulture)}"
printfn $"""{outputDate.ToString(format, CultureInfo "fr-FR")}"""
printfn $"""{outputDate.ToString(format, CultureInfo "es-ES")}"""

// The example displays the following output to the console:
//    Thursday, Nov 01 2007 09:00:00 -07:00
//    Thursday, Nov 01 2007 09:00:00 -07:00
//    jeudi, nov. 01 2007 09:00:00 -07:00
//    jueves, nov 01 2007 09:00:00 -07:00

Dim outputDate As New DateTimeOffset(#11/1/2007 9:00AM#, _
                                     New TimeSpan(-7, 0, 0)) 
Dim format As String = "dddd, MMM dd yyyy HH:mm:ss zzz"

' Output date and time using custom format specification
Console.WriteLine(outputDate.ToString(format, Nothing))
Console.WriteLine(outputDate.ToString(format, CultureInfo.InvariantCulture))
Console.WriteLine(outputDate.ToString(format, _
                                      New CultureInfo("fr-FR")))
Console.WriteLine(outputDate.ToString(format, _
                                      New CultureInfo("es-ES")))
' The example displays the following output to the console:
'    Thursday, Nov 01 2007 09:00:00 -07:00
'    Thursday, Nov 01 2007 09:00:00 -07:00
'    jeudi, nov. 01 2007 09:00:00 -07:00
'    jueves, nov 01 2007 09:00:00 -07:00

注解

参数 format 应包含单个格式说明符字符 (请参阅标准日期和时间格式字符串) 或自定义格式模式 (请参阅自定义日期和时间格式字符串) 。如果 format 为 null 或空字符串 (“”) ，则 DateTimeOffset 使用默认格式输出对象。

下表显示了与一起使用 DateTimeOffset时某些格式说明符的确切操作，这与与与一起使用 DateTime时的行为不同。

现有格式说明符	新行为
“K”	旨在往返日期和时间。使用 DateTimeOffset，映射到“zzz” (偏移量始终以小时和分钟) 显示。请注意，“K”是自定义格式说明符;它不能显示为中的 `format`单个字符。
“U”	不支持。
“r”	将 DateTimeOffset 对象转换为协调世界时 (UTC) ，并使用自定义格式字符串 `ddd, dd MMM yyyy HH:mm:ss GMT`输出它。
“u”	将 DateTimeOffset 值转换为 UTC，并使用格式 `yyyy-MM-dd HH:mm:ssZ`输出它。

剩余的标准日期和时间格式说明符与 ToString(String) 方法 ToString 的行为相同。

与标准格式说明符对应的模式以及日期和时间组件的符号和名称由 formatProvider 参数定义。参数 formatProvider 可以是以下任一参数：

一个 CultureInfo 对象，该对象表示在中使用 input其格式的区域性。 DateTimeFormatInfo属性返回CultureInfo.DateTimeFormat的对象定义中使用的input格式。
一个 DateTimeFormatInfo 定义日期和时间数据格式的对象。

如果 formatProvider 为 null，则 DateTimeFormatInfo 使用与当前区域性关联的对象， (请参阅 CurrentCulture) 。

调用方说明

方法 ToString(String, IFormatProvider) 返回参数使用的 formatProvider 日历中日期和时间的字符串表示形式。其日历由 Calendar 属性定义。如果当前 DateTimeOffset 实例的值早于 MinSupportedDateTime 或晚于 MaxSupportedDateTime，则方法将 ArgumentOutOfRangeException引发。下面的示例进行了这方面的演示。它尝试设置类范围 UmAlQuraCalendar 之外的日期的格式。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      CultureInfo arSA = new CultureInfo("ar-SA");
      arSA.DateTimeFormat.Calendar = new UmAlQuraCalendar();
      DateTimeOffset date1 = new DateTimeOffset(new DateTime(1890, 9, 10),
                                                TimeSpan.Zero);

      try {
         Console.WriteLine(date1.ToString("d", arSA));
      }
      catch (ArgumentOutOfRangeException) {
         Console.WriteLine("{0:d} is earlier than {1:d} or later than {2:d}",
                           date1,
                           arSA.DateTimeFormat.Calendar.MinSupportedDateTime,
                           arSA.DateTimeFormat.Calendar.MaxSupportedDateTime);
      }
   }
}
// The example displays the following output:
//    9/10/1890 is earlier than 4/30/1900 or later than 5/13/2029

open System
open System.Globalization

let arSA = CultureInfo "ar-SA"
arSA.DateTimeFormat.Calendar <- UmAlQuraCalendar()
let date1 = DateTimeOffset(DateTime(1890, 9, 10), TimeSpan.Zero)

try
    printfn $"""{date1.ToString("d", arSA)}"""
with :? ArgumentOutOfRangeException ->
    printfn $"{date1:d} is earlier than {arSA.DateTimeFormat.Calendar.MinSupportedDateTime:d} or later than {arSA.DateTimeFormat.Calendar.MaxSupportedDateTime:d}"

// The example displays the following output:
//    9/10/1890 is earlier than 4/30/1900 or later than 11/16/2077

Imports System.Globalization

Module Example
   Public Sub Main()
      Dim arSA As New CultureInfo("ar-SA")
      arSA.DateTimeFormat.Calendar = New UmAlQuraCalendar() 
      Dim date1 As New DateTimeOffset(#09/10/1890#, TimeSpan.Zero)

      Try
         Console.WriteLine(date1.ToString("d", arSA))
      Catch e As ArgumentOutOfRangeException
         Console.WriteLine("{0:d} is earlier than {1:d} or later than {2:d}", _
                           date1, _
                           arSA.DateTimeFormat.Calendar.MinSupportedDateTime, _ 
                           arSA.DateTimeFormat.Calendar.MaxSupportedDateTime) 
      End Try
   End Sub
End Module
' The example displays the following output:
'    9/10/1890 is earlier than 4/30/1900 or later than 5/13/2029

另请参阅

适用于

通过

DateTimeOffset.ToString 方法

定义

重载

ToString()

返回

例外

示例

注解

调用方说明

适用于

ToString(IFormatProvider)

参数

返回

例外

示例

注解

调用方说明

适用于

ToString(String)

参数

返回

例外

示例

注解

调用方说明

另请参阅

适用于

ToString(String, IFormatProvider)

参数

返回

实现

例外

示例

注解

调用方说明

另请参阅

适用于

反馈

其他资源