TimeZone Klasa

Definicja

Ostrzeżenie

Ten interfejs API jest teraz przestarzały.

Reprezentuje strefę czasową.Represents a time zone.

public ref class TimeZone abstract
[System.Runtime.InteropServices.ComVisible(true)]
[System.Obsolete("System.TimeZone has been deprecated.  Please investigate the use of System.TimeZoneInfo instead.")]
[System.Serializable]
public abstract class TimeZone
type TimeZone = class
Public MustInherit Class TimeZone
Dziedziczenie
TimeZone
Atrybuty

Przykłady

Poniższy przykład zawiera odwołania do wybranych elementów klasy TimeZone.The following example references and displays selected TimeZone class elements.

// Example of selected TimeZone class elements.
using namespace System;
using namespace System::Globalization;
int main()
{
   String^ dataFmt = "{0,-30}{1}";
   String^ timeFmt = "{0,-30}{1:yyyy-MM-dd HH:mm}";
   Console::WriteLine( "This example of selected TimeZone class "
   "elements generates the following \n"
   "output, which varies depending on the "
   "time zone in which it is run.\n" );
   
   // Get the local time zone and the current local time and year.
   TimeZone^ localZone = TimeZone::CurrentTimeZone;
   DateTime currentDate = DateTime::Now;
   int currentYear = currentDate.Year;
   
   // Display the names for standard time and daylight saving 
   // time for the local time zone.
   Console::WriteLine( dataFmt, "Standard time name:", localZone->StandardName );
   Console::WriteLine( dataFmt, "Daylight saving time name:", localZone->DaylightName );
   
   // Display the current date and time and show if they occur 
   // in daylight saving time.
   Console::WriteLine( String::Concat( "\n", timeFmt ), "Current date and time:", currentDate );
   Console::WriteLine( dataFmt, "Daylight saving time?", localZone->IsDaylightSavingTime( currentDate ) );
   
   // Get the current Coordinated Universal Time (UTC) and UTC 
   // offset.
   DateTime currentUTC = localZone->ToUniversalTime( currentDate );
   TimeSpan currentOffset = localZone->GetUtcOffset( currentDate );
   Console::WriteLine( timeFmt, "Coordinated Universal Time:", currentUTC );
   Console::WriteLine( dataFmt, "UTC offset:", currentOffset );
   
   // Get the DaylightTime object for the current year.
   DaylightTime^ daylight = localZone->GetDaylightChanges( currentYear );
   
   // Display the daylight saving time range for the current year.
   Console::WriteLine( "\nDaylight saving time for year {0}:", currentYear );
   Console::WriteLine( "{0:yyyy-MM-dd HH:mm} to "
   "{1:yyyy-MM-dd HH:mm}, delta: {2}", daylight->Start, daylight->End, daylight->Delta );
}

/*
This example of selected TimeZone class elements generates the following
output, which varies depending on the time zone in which it is run.

Standard time name:           Pacific Standard Time
Daylight saving time name:    Pacific Daylight Time

Current date and time:        2006-01-06 16:47
Daylight saving time?         False
Coordinated Universal Time:   2006-01-07 00:47
UTC offset:                   -08:00:00

Daylight saving time for year 2006:
2006-04-02 02:00 to 2006-10-29 02:00, delta: 01:00:00
*/
// Example of selected TimeZone class elements.
using System;
using System.Globalization;

class TimeZoneDemo
{
    static void Main( )
    {
        const string dataFmt = "{0,-30}{1}";
        const string timeFmt = "{0,-30}{1:yyyy-MM-dd HH:mm}";

        Console.WriteLine(
            "This example of selected TimeZone class " +
            "elements generates the following \n" +
            "output, which varies depending on the " +
            "time zone in which it is run.\n" );

        // Get the local time zone and the current local time and year.
        TimeZone localZone = TimeZone.CurrentTimeZone;
        DateTime currentDate = DateTime.Now;
        int      currentYear = currentDate.Year;

        // Display the names for standard time and daylight saving 
        // time for the local time zone.
        Console.WriteLine( dataFmt, "Standard time name:", 
            localZone.StandardName );
        Console.WriteLine( dataFmt, "Daylight saving time name:", 
            localZone.DaylightName );

        // Display the current date and time and show if they occur 
        // in daylight saving time.
        Console.WriteLine( "\n" + timeFmt, "Current date and time:",
            currentDate );
        Console.WriteLine( dataFmt, "Daylight saving time?", 
            localZone.IsDaylightSavingTime( currentDate ) );

        // Get the current Coordinated Universal Time (UTC) and UTC 
        // offset.
        DateTime currentUTC = 
            localZone.ToUniversalTime( currentDate );
        TimeSpan currentOffset = 
            localZone.GetUtcOffset( currentDate );

        Console.WriteLine( timeFmt, "Coordinated Universal Time:", 
            currentUTC );
        Console.WriteLine( dataFmt, "UTC offset:", currentOffset );

        // Get the DaylightTime object for the current year.
        DaylightTime daylight = 
            localZone.GetDaylightChanges( currentYear );

        // Display the daylight saving time range for the current year.
        Console.WriteLine( 
            "\nDaylight saving time for year {0}:", currentYear );
        Console.WriteLine( "{0:yyyy-MM-dd HH:mm} to " +
            "{1:yyyy-MM-dd HH:mm}, delta: {2}", 
            daylight.Start, daylight.End, daylight.Delta );
    } 
} 

/*
This example of selected TimeZone class elements generates the following
output, which varies depending on the time zone in which it is run.

Standard time name:           Pacific Standard Time
Daylight saving time name:    Pacific Daylight Time

Current date and time:        2006-01-06 16:47
Daylight saving time?         False
Coordinated Universal Time:   2006-01-07 00:47
UTC offset:                   -08:00:00

Daylight saving time for year 2006:
2006-04-02 02:00 to 2006-10-29 02:00, delta: 01:00:00
*/ 
' Example of selected TimeZone class elements.
Imports System.Globalization

Module TimeZoneDemo

    Sub Main( )

        Const dataFmt As String = "{0,-30}{1}"
        Const timeFmt As String = "{0,-30}{1:yyyy-MM-dd HH:mm}"

        Console.WriteLine( "This example of selected " & _
            "TimeZone class elements generates the following " & _
            vbCrLf & "output, which varies depending on the " & _
            "time zone in which it is run." & vbCrLf )

        ' Get the local time zone and the current local time and year.
        Dim localZone As TimeZone = TimeZone.CurrentTimeZone
        Dim currentDate As DateTime = DateTime.Now
        Dim currentYear As Integer = currentDate.Year

        ' Display the names for standard time and daylight saving 
        ' time for the local time zone.
        Console.WriteLine( dataFmt, "Standard time name:", _
            localZone.StandardName )
        Console.WriteLine( dataFmt, "Daylight saving time name:", _
            localZone.DaylightName )

        ' Display the current date and time and show if they occur 
        ' in daylight saving time.
        Console.WriteLine( vbCrLf & timeFmt, _
            "Current date and time:", currentDate )
        Console.WriteLine( dataFmt, "Daylight saving time?", _
            localZone.IsDaylightSavingTime( currentDate ) )

        ' Get the current Coordinated Universal Time (UTC) and UTC 
        ' offset.
        Dim currentUTC As DateTime = _
            localZone.ToUniversalTime( currentDate )
        Dim currentOffset As TimeSpan = _
            localZone.GetUtcOffset( currentDate )

        Console.WriteLine( timeFmt, "Coordinated Universal Time:", _
            currentUTC )
        Console.WriteLine( dataFmt, "UTC offset:", currentOffset )

        ' Get the DaylightTime object for the current year.
        Dim daylight As DaylightTime = _
            localZone.GetDaylightChanges( currentYear )

        ' Display the daylight saving time range for the current year.
        Console.WriteLine( vbCrLf & _
            "Daylight saving time for year {0}:", currentYear )
        Console.WriteLine( "{0:yyyy-MM-dd HH:mm} to " & _
            "{1:yyyy-MM-dd HH:mm}, delta: {2}", _
            daylight.Start, daylight.End, daylight.Delta )
    End Sub 
End Module 

'This example of selected TimeZone class elements generates the following
'output, which varies depending on the time zone in which it is run.
'
'Standard time name:           Pacific Standard Time
'Daylight saving time name:    Pacific Daylight Time
'
'Current date and time:        2006-01-06 16:47
'Daylight saving time?         False
'Coordinated Universal Time:   2006-01-07 00:47
'UTC offset:                   -08:00:00
'
'Daylight saving time for year 2006:
'2006-04-02 02:00 to 2006-10-29 02:00, delta: 01:00:00

Uwagi

Strefa czasowa jest regionem geograficznym, w którym jest używany ten sam czas standardowy.A time zone is a geographical region in which the same standard time is used.

Ważne

Jeśli to możliwe, należy użyć klasy TimeZoneInfo zamiast klasy TimeZone.Whenever possible, use the TimeZoneInfo class instead of the TimeZone class.

Za pomocą klasy TimeZone można pobrać informacje o bieżącej strefie czasowej i skonwertować czas lokalny na uniwersalny czas koordynowany (UTC) lub odwrotnie.You can use the TimeZone class to retrieve information about the current time zone, and to convert times from local time to Coordinated Universal Time (UTC) or vice versa. Nie można jednak użyć klasy TimeZone do reprezentowania stref czasowych innych niż strefa lokalna lub do obsługi konwersji daty i godziny z jednej strefy czasowej na inną.However, you cannot use the TimeZone class to represent time zones other than the local zone or to handle date and time conversions from one time zone to another. W tym celu należy użyć klasy TimeZoneInfo.For this purpose, use the TimeZoneInfo class. Za pomocą tej klasy można pobrać informacje dotyczące dowolnej strefy czasowej zdefiniowanej w systemie lokalnym, utworzyć niestandardowe strefy czasowe i przekonwertować czasy z jednej strefy czasowej na inną.You can use this class to retrieve information on any time zone defined on the local system, to create custom time zones, and to convert times from one time zone to another.

Klasa TimeZone obsługuje tylko jedną regułę korekty czasu letniego dla lokalnej strefy czasowej.The TimeZone class supports only a single daylight saving time adjustment rule for the local time zone. W związku z tym Klasa TimeZone może dokładnie raportować informacje o czasie letnim lub konwertować między czasem UTC a czasem lokalnym tylko dla okresu, w którym obowiązuje Najnowsza Reguła korekty.As a result, the TimeZone class can accurately report daylight saving time information or convert between UTC and local time only for the period in which the latest adjustment rule is in effect. Z kolei Klasa TimeZoneInfo obsługuje wiele reguł dostosowawczych, co umożliwia współpracę z danymi strefy czasowej historycznej.In contrast, the TimeZoneInfo class supports multiple adjustment rules, which makes it possible to work with historic time zone data.

Uwagi dotyczące implementowania

Oprócz zapewniania implementacji dla abstract elementów członkowskich (oznaczonych MustOverride w Visual Basic), ważne jest, aby klasy pochodzące z TimeZone zastąpiły domyślne zachowanie metody ToLocalTime(DateTime).In addition to providing implementations for its abstract members (those marked MustOverride in Visual Basic), it is important that classes derived from TimeZone override the default behavior of the ToLocalTime(DateTime) method. Wynika to z faktu, że domyślne zachowanie ToLocalTime(DateTime) w .NET Framework wersji 2,0 nie zależy od wywołania GetUtcOffset(DateTime), tak jak w .NET Framework wersjach 1,0 i 1,1.This is because the default behavior of ToLocalTime(DateTime) in the .NET Framework version 2.0 does not depend on a call to GetUtcOffset(DateTime), as it did in the .NET Framework versions 1.0 and 1.1. Aby uzyskać szczegółowe informacje, zobacz metodę ToLocalTime(DateTime).For details, see the ToLocalTime(DateTime) method.

Konstruktory

TimeZone()

Inicjuje nowe wystąpienie klasy TimeZone klasy.Initializes a new instance of the TimeZone class.

Właściwości

CurrentTimeZone

Pobiera strefę czasową bieżącego komputera.Gets the time zone of the current computer.

DaylightName

Pobiera nazwę strefy czasowej czasu letniego.Gets the daylight saving time zone name.

StandardName

Pobiera nazwę standardowej strefy czasowej.Gets the standard time zone name.

Metody

Equals(Object)

Określa, czy określony obiekt jest równy bieżącemu obiektowi.Determines whether the specified object is equal to the current object.

(Odziedziczone po Object)
GetDaylightChanges(Int32)

Zwraca okres czasu letniego dla danego roku.Returns the daylight saving time period for a particular year.

GetHashCode()

Służy jako domyślna funkcja skrótu.Serves as the default hash function.

(Odziedziczone po Object)
GetType()

Pobiera Type bieżącego wystąpienia.Gets the Type of the current instance.

(Odziedziczone po Object)
GetUtcOffset(DateTime)

Zwraca przesunięcie uniwersalnego czasu koordynowanego (UTC) dla określonego czasu lokalnego.Returns the Coordinated Universal Time (UTC) offset for the specified local time.

IsDaylightSavingTime(DateTime)

Zwraca wartość wskazującą, czy określona data i godzina przypada w okresie czasu letniego.Returns a value indicating whether the specified date and time is within a daylight saving time period.

IsDaylightSavingTime(DateTime, DaylightTime)

Zwraca wartość wskazującą, czy określona data i godzina przypada w określonym okresie czasu letniego.Returns a value indicating whether the specified date and time is within the specified daylight saving time period.

MemberwiseClone()

Tworzy skróconą kopię bieżącego Object.Creates a shallow copy of the current Object.

(Odziedziczone po Object)
ToLocalTime(DateTime)

Zwraca czas lokalny odpowiadający określonej wartości daty i godziny.Returns the local time that corresponds to a specified date and time value.

ToString()

Zwraca ciąg, który reprezentuje bieżący obiekt.Returns a string that represents the current object.

(Odziedziczone po Object)
ToUniversalTime(DateTime)

Zwraca uniwersalny czas koordynowany (UTC), który odnosi się do określonego czasu.Returns the Coordinated Universal Time (UTC) that corresponds to a specified time.

Dotyczy

Zobacz też