TimeZone Classe

Definizione

Attenzione

System.TimeZone has been deprecated. Please investigate the use of System.TimeZoneInfo instead.

Rappresenta un fuso orario.Represents a time zone.

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

Esempio

Nell'esempio seguente viene fatto riferimento a e vengono visualizzati TimeZone gli elementi della classe selezionati.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

Commenti

Un fuso orario è un'area geografica in cui viene utilizzata la stessa ora solare.A time zone is a geographical region in which the same standard time is used.

Importante

Quando possibile, usare la TimeZoneInfo classe invece della TimeZone classe.Whenever possible, use the TimeZoneInfo class instead of the TimeZone class.

È possibile utilizzare la TimeZone classe per recuperare le informazioni sul fuso orario corrente e per convertire i tempi dall'ora locale all'ora UTC (Coordinated Universal Time) o viceversa.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. Tuttavia, non è possibile usare la TimeZone classe per rappresentare i fusi orari diversi dalla zona locale o per gestire le conversioni di data e ora da un fuso orario a un altro.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. A questo scopo, usare la TimeZoneInfo classe.For this purpose, use the TimeZoneInfo class. È possibile usare questa classe per recuperare le informazioni su qualsiasi fuso orario definito nel sistema locale, per creare fusi orari personalizzati e per convertire gli orari da un fuso orario a un altro.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.

La TimeZone classe supporta solo una singola regola di regolazione dell'ora legale per il fuso orario locale.The TimeZone class supports only a single daylight saving time adjustment rule for the local time zone. Di conseguenza, la TimeZone classe può segnalare accuratamente le informazioni sull'ora legale o eseguire la conversione tra l'ora UTC e l'ora locale solo per il periodo in cui è attiva la regola di rettifica più recente.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. Al contrario, la TimeZoneInfo classe supporta più regole di regolazione, che consentono di utilizzare i dati cronologici del fuso orario.In contrast, the TimeZoneInfo class supports multiple adjustment rules, which makes it possible to work with historic time zone data.

Note per gli implementatori

Oltre a fornire implementazioni per i relativi abstract membri (quelli contrassegnati MustOverride in Visual Basic), è importante che le classi derivate da TimeZone eseguano l'override del comportamento predefinito del ToLocalTime(DateTime) metodo.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. Questo perché il comportamento predefinito di ToLocalTime(DateTime) nella .NET Framework versione 2,0 non dipende da una chiamata a GetUtcOffset(DateTime) , come nel .NET Framework versioni 1,0 e 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. Per informazioni dettagliate, vedere il ToLocalTime(DateTime) metodo.For details, see the ToLocalTime(DateTime) method.

Costruttori

TimeZone()

Inizializza una nuova istanza della classe TimeZone.Initializes a new instance of the TimeZone class.

Proprietà

CurrentTimeZone

Ottiene il fuso orario del computer corrente.Gets the time zone of the current computer.

DaylightName

Ottiene il nome del fuso orario con l'ora legale.Gets the daylight saving time zone name.

StandardName

Ottiene il nome del fuso orario standard.Gets the standard time zone name.

Metodi

Equals(Object)

Determina se l'oggetto specificato è uguale all'oggetto corrente.Determines whether the specified object is equal to the current object.

(Ereditato da Object)
GetDaylightChanges(Int32)

Restituisce il periodo di applicazione dell'ora legale per un anno specifico.Returns the daylight saving time period for a particular year.

GetHashCode()

Funge da funzione hash predefinita.Serves as the default hash function.

(Ereditato da Object)
GetType()

Ottiene l'oggetto Type dell'istanza corrente.Gets the Type of the current instance.

(Ereditato da Object)
GetUtcOffset(DateTime)

Restituisce lo scostamento dall'ora UTC (Coordinated Universal Time) per l'ora locale specificata.Returns the Coordinated Universal Time (UTC) offset for the specified local time.

IsDaylightSavingTime(DateTime)

Restituisce un valore che indica se la data e l'ora specificate sono comprese in un periodo di applicazione dell'ora legale.Returns a value indicating whether the specified date and time is within a daylight saving time period.

IsDaylightSavingTime(DateTime, DaylightTime)

Restituisce un valore che indica se la data e l'ora specificate sono comprese nel periodo di applicazione dell'ora legale specificato.Returns a value indicating whether the specified date and time is within the specified daylight saving time period.

MemberwiseClone()

Crea una copia superficiale dell'oggetto Object corrente.Creates a shallow copy of the current Object.

(Ereditato da Object)
ToLocalTime(DateTime)

Restituisce l'ora locale corrispondente a un valore di data e ora specificato.Returns the local time that corresponds to a specified date and time value.

ToString()

Restituisce una stringa che rappresenta l'oggetto corrente.Returns a string that represents the current object.

(Ereditato da Object)
ToUniversalTime(DateTime)

Restituisce l'ora UTC (Coordinated Universal Time) corrispondente a un'ora specificata.Returns the Coordinated Universal Time (UTC) that corresponds to a specified time.

Si applica a

Vedi anche