CultureInfo.DateTimeFormat CultureInfo.DateTimeFormat CultureInfo.DateTimeFormat CultureInfo.DateTimeFormat Property

定义

获取或设置 DateTimeFormatInfo,它定义适合区域性的、显示日期和时间的格式。Gets or sets a DateTimeFormatInfo that defines the culturally appropriate format of displaying dates and times.

public:
 virtual property System::Globalization::DateTimeFormatInfo ^ DateTimeFormat { System::Globalization::DateTimeFormatInfo ^ get(); void set(System::Globalization::DateTimeFormatInfo ^ value); };
public virtual System.Globalization.DateTimeFormatInfo DateTimeFormat { get; set; }
member this.DateTimeFormat : System.Globalization.DateTimeFormatInfo with get, set
Public Overridable Property DateTimeFormat As DateTimeFormatInfo

属性值

一个 DateTimeFormatInfo,它定义适合区域性的、显示日期和时间的格式。A DateTimeFormatInfo that defines the culturally appropriate format of displaying dates and times.

异常

该属性设置为 null。The property is set to null.

设置了 DateTimeFormat 属性或任何 DateTimeFormatInfo 属性,但 CultureInfo 是只读的。The DateTimeFormat property or any of the DateTimeFormatInfo properties is set, and the CultureInfo is read-only.

示例

下面的代码示例演示了 CultureInfo。 clone 还会克隆DateTimeFormatInfoNumberFormatInfo CultureInfo相关联的和实例。The following code example shows that CultureInfo.Clone also clones the DateTimeFormatInfo and NumberFormatInfo instances associated with the CultureInfo.

using namespace System;
using namespace System::Globalization;
int main()
{
   
   // Creates and initializes a CultureInfo.
   CultureInfo^ myCI = gcnew CultureInfo( "en-US",false );
   
   // Clones myCI and modifies the DTFI and NFI instances associated with the clone.
   CultureInfo^ myCIclone = dynamic_cast<CultureInfo^>(myCI->Clone());
   myCIclone->DateTimeFormat->AMDesignator = "a.m.";
   myCIclone->DateTimeFormat->DateSeparator = "-";
   myCIclone->NumberFormat->CurrencySymbol = "USD";
   myCIclone->NumberFormat->NumberDecimalDigits = 4;
   
   // Displays the properties of the DTFI and NFI instances associated with the original and with the clone. 
   Console::WriteLine( "DTFI/NFI PROPERTY\tORIGINAL\tMODIFIED CLONE" );
   Console::WriteLine( "DTFI.AMDesignator\t{0}\t\t{1}", myCI->DateTimeFormat->AMDesignator, myCIclone->DateTimeFormat->AMDesignator );
   Console::WriteLine( "DTFI.DateSeparator\t{0}\t\t{1}", myCI->DateTimeFormat->DateSeparator, myCIclone->DateTimeFormat->DateSeparator );
   Console::WriteLine( "NFI.CurrencySymbol\t{0}\t\t{1}", myCI->NumberFormat->CurrencySymbol, myCIclone->NumberFormat->CurrencySymbol );
   Console::WriteLine( "NFI.NumberDecimalDigits\t{0}\t\t{1}", myCI->NumberFormat->NumberDecimalDigits, myCIclone->NumberFormat->NumberDecimalDigits );
}

/*
This code produces the following output.

DTFI/NFI PROPERTY       ORIGINAL        MODIFIED CLONE
DTFI.AMDesignator       AM              a.m.
DTFI.DateSeparator      /               -
NFI.CurrencySymbol      $               USD
NFI.NumberDecimalDigits 2               4
*/
using System;
using System.Globalization;


public class SamplesCultureInfo  {

   public static void Main()  {

      // Creates and initializes a CultureInfo.
      CultureInfo myCI = new CultureInfo("en-US", false);

      // Clones myCI and modifies the DTFI and NFI instances associated with the clone.
      CultureInfo myCIclone = (CultureInfo) myCI.Clone();
      myCIclone.DateTimeFormat.AMDesignator = "a.m.";
      myCIclone.DateTimeFormat.DateSeparator = "-";
      myCIclone.NumberFormat.CurrencySymbol = "USD";
      myCIclone.NumberFormat.NumberDecimalDigits = 4;

      // Displays the properties of the DTFI and NFI instances associated with the original and with the clone. 
      Console.WriteLine( "DTFI/NFI PROPERTY\tORIGINAL\tMODIFIED CLONE" );
      Console.WriteLine( "DTFI.AMDesignator\t{0}\t\t{1}", myCI.DateTimeFormat.AMDesignator, myCIclone.DateTimeFormat.AMDesignator );
      Console.WriteLine( "DTFI.DateSeparator\t{0}\t\t{1}", myCI.DateTimeFormat.DateSeparator, myCIclone.DateTimeFormat.DateSeparator );
      Console.WriteLine( "NFI.CurrencySymbol\t{0}\t\t{1}", myCI.NumberFormat.CurrencySymbol, myCIclone.NumberFormat.CurrencySymbol );
      Console.WriteLine( "NFI.NumberDecimalDigits\t{0}\t\t{1}", myCI.NumberFormat.NumberDecimalDigits, myCIclone.NumberFormat.NumberDecimalDigits );
      
   }

}

/*
This code produces the following output.

DTFI/NFI PROPERTY       ORIGINAL        MODIFIED CLONE
DTFI.AMDesignator       AM              a.m.
DTFI.DateSeparator      /               -
NFI.CurrencySymbol      $               USD
NFI.NumberDecimalDigits 2               4

*/
Imports System.Globalization


Public Class SamplesCultureInfo
   
   Public Shared Sub Main()
      
      ' Creates and initializes a CultureInfo.
      Dim myCI As New CultureInfo("en-US", False)
      
      ' Clones myCI and modifies the DTFI and NFI instances associated with the clone.
      Dim myCIclone As CultureInfo = CType(myCI.Clone(), CultureInfo)
      myCIclone.DateTimeFormat.AMDesignator = "a.m."
      myCIclone.DateTimeFormat.DateSeparator = "-"
      myCIclone.NumberFormat.CurrencySymbol = "USD"
      myCIclone.NumberFormat.NumberDecimalDigits = 4
      
      ' Displays the properties of the DTFI and NFI instances associated with the original and with the clone. 
      Console.WriteLine("DTFI/NFI PROPERTY" + ControlChars.Tab + "ORIGINAL" + ControlChars.Tab + "MODIFIED CLONE")
      Console.WriteLine("DTFI.AMDesignator" + ControlChars.Tab + "{0}" + ControlChars.Tab + ControlChars.Tab + "{1}", myCI.DateTimeFormat.AMDesignator, myCIclone.DateTimeFormat.AMDesignator)
      Console.WriteLine("DTFI.DateSeparator" + ControlChars.Tab + "{0}" + ControlChars.Tab + ControlChars.Tab + "{1}", myCI.DateTimeFormat.DateSeparator, myCIclone.DateTimeFormat.DateSeparator)
      Console.WriteLine("NFI.CurrencySymbol" + ControlChars.Tab + "{0}" + ControlChars.Tab + ControlChars.Tab + "{1}", myCI.NumberFormat.CurrencySymbol, myCIclone.NumberFormat.CurrencySymbol)
      Console.WriteLine("NFI.NumberDecimalDigits" + ControlChars.Tab + "{0}" + ControlChars.Tab + ControlChars.Tab + "{1}", myCI.NumberFormat.NumberDecimalDigits, myCIclone.NumberFormat.NumberDecimalDigits)

   End Sub

End Class 'SamplesCultureInfo


' This code produces the following output.
'
' DTFI/NFI PROPERTY       ORIGINAL        MODIFIED CLONE
' DTFI.AMDesignator       AM              a.m.
' DTFI.DateSeparator      /               -
' NFI.CurrencySymbol      $               USD
' NFI.NumberDecimalDigits 2               4

注解

OverridesOverrides

用户可以选择通过 "控制面板" 的 "区域和语言选项" 部分,替代与 Windows 的当前区域性关联的某些值。The user might choose to override some of the values associated with the current culture of Windows through the regional and language options portion of Control Panel. 例如,用户可以选择以不同的格式显示日期,或使用区域性默认值以外的其他货币。For example, the user might choose to display the date in a different format or to use a currency other than the default for the culture.

如果UseUserOverride CultureInfotrue ,并且指定的区域性与 Windows 的当前区域性匹配,则将使用这些替代, DateTimeFormatInfo包括DateTimeFormat属性返回的实例的属性的用户设置。属性NumberFormat返回的NumberFormatInfo实例的属性。If UseUserOverride is true and the specified culture matches the current culture of Windows, the CultureInfo uses those overrides, including user settings for the properties of the DateTimeFormatInfo instance returned by the DateTimeFormat property, and the properties of the NumberFormatInfo instance returned by the NumberFormat property. 如果用户设置与关联CultureInfo的区域性不兼容(例如,如果所选的日历不OptionalCalendars是),则方法的结果和属性的值是不确定的。If the user settings are incompatible with the culture associated with the CultureInfo, for example, if the selected calendar is not one of the OptionalCalendars, the results of the methods and the values of the properties are undefined.

在应用程序访问DateTimeFormat属性之前, NumberFormat不会计算属性和属性的值。The value of the DateTimeFormat property and the NumberFormat property is not calculated until your application accesses the property. 如果用户可以在应用程序运行时将当前区域性更改为新的区域性,然后应用程序访问DateTimeFormatNumberFormat属性,则应用程序将检索新区域性的默认值,而不是原始区域性。If the user can change the current culture to a new culture while the application is running and then the application accesses the DateTimeFormat or NumberFormat property, the application retrieves the defaults for the new culture instead of the overrides for the original culture. 若要保留原始当前区域性的替代,应用程序应在更改当前DateTimeFormat区域性NumberFormat之前访问和属性。To preserve the overrides for the original current culture, the application should access the DateTimeFormat and NumberFormat properties before changing the current culture.

调用方说明

如果Calendar GetEraName(Int32) GetAbbreviatedEraName(Int32) NativeCalendarName为,但未设置为中文(台湾),名为zh-chs,则,然后返回空字符串("")。TaiwanCalendar CurrentCultureIf Calendar is the TaiwanCalendar but the CurrentCulture is not set to Chinese (Taiwan), named zh-TW, then NativeCalendarName, GetEraName(Int32), and GetAbbreviatedEraName(Int32) return an empty string ("").

适用于

另请参阅