CultureInfo.DateTimeFormat 屬性
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
取得或設定 DateTimeFormatInfo,定義日期和時間在文化特性上適當的顯示格式。
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
屬性值
DateTimeFormatInfo,定義用於顯示日期和時間的適當文化特性格式。
例外狀況
此屬性設定為 null。
DateTimeFormat 屬性或 DateTimeFormatInfo 屬性的任何一個已設定,而且 CultureInfo 處於唯讀狀態。
範例
下列程式代碼範例顯示 CultureInfo.Clone 也會複製DateTimeFormatInfo與 CultureInfo相關聯的 和 NumberFormatInfo 實例。
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
' 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
備註
您可以選擇透過 控制台 的區域和語言選項部分,覆寫與目前 Windows 文化特性相關聯的某些值。 例如,使用者可能會選擇以不同的格式顯示日期,或使用文化特性預設值以外的貨幣。
如果 UseUserOverride 是 true
且指定的文化特性符合 Windows 目前的文化特性,則會CultureInfo使用這些覆寫,包括 屬性所DateTimeFormat傳回之實例屬性DateTimeFormatInfo的用戶設定,以及 屬性所NumberFormat傳回之實例的屬性NumberFormatInfo。 例如,如果使用者設定與相關聯的 CultureInfo文化特性不相容,例如,如果選取的行事曆不是 其中 OptionalCalendars一個 ,則方法的結果和屬性的值是未定義的。
在您的應用程式存取屬性之前,不會計算屬性和 NumberFormat 屬性的值DateTimeFormat。 如果使用者在執行應用程式時,可以將目前的文化特性變更為新的文化特性,然後應用程式 DateTimeFormat 存取 或 NumberFormat 屬性,則應用程式會擷取新文化特性的預設值,而不是原始文化特性的覆寫。 若要保留原始目前文化特性的覆寫,應用程式應該先存取 DateTimeFormat 和 NumberFormat 屬性,再變更目前的文化特性。
給呼叫者的注意事項
如果 Calendar 是 TaiwanCalendar , CurrentCulture 但 未設定為 (臺灣) ,名為 zh-TW,則 NativeCalendarName為 , GetEraName(Int32)並 GetAbbreviatedEraName(Int32) 傳回空字串 (“”) 。