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DaylightTime (Clase)

Actualización: noviembre 2007

Define el período del horario de verano.

Espacio de nombres:  System.Globalization
Ensamblado:  mscorlib (en mscorlib.dll)

[SerializableAttribute]
[ComVisibleAttribute(true)]
public class DaylightTime
/** @attribute SerializableAttribute */ 
/** @attribute ComVisibleAttribute(true) */
public class DaylightTime
public class DaylightTime

El horario de verano es un período del año en que se adelanta la hora, normalmente una, para aprovechar el mayor número de horas de luz solar. Al final del período, se restablece el horario estándar.

La clase DaylightTime la utilizan a menudo los miembros de la clase System.TimeZone.

En el siguiente ejemplo de código se usa el método TimeZone.GetDaylightChanges(Int32) para devolver el período de horario de verano y la compensación de los años seleccionados.

// Example of the TimeZone.GetDaylightChanges( int ) method.
using System;
using System.Globalization;

class DaylightChangesDemo
{
    // Get the local time zone and a base local time.
    static TimeZone localZone = TimeZone.CurrentTimeZone;

    static void CreateDaylightTime( int year )
    {
        // Create a DaylightTime object for the specified year.
        DaylightTime daylight = 
            localZone.GetDaylightChanges( year );

        // Display the start and end dates and the time change.
        Console.WriteLine( "{0,-7}{1,-20:yyyy-MM-dd HH:mm}" +
            "{2,-20:yyyy-MM-dd HH:mm}{3}", 
            year, daylight.Start, daylight.End, daylight.Delta );
    } 

    static void Main( )
    {
        const string headFmt = "{0,-7}{1,-20}{2,-20}{3}";

        Console.WriteLine(
            "This example of TimeZone.GetDaylightChanges( int ) " +
            "generates the \nfollowing output, which varies " +
            "depending on the time zone in which \nit is run. The " +
            "example creates DaylightTime objects for specified \n" +
            "years and displays the start and end dates and time " +
            "change for \ndaylight saving time.\n" );

        // Write a message explaining that start dates prior to 1986 
        // in the en-US culture may not be correct.
        if( CultureInfo.CurrentCulture.Name == "en-US" )
        {
            Console.WriteLine(
                "Note: In the [en-US] culture, all start dates are " +
                "calculated from \nthe first Sunday in April, " +
                "based on a standard set in 1986. For \ndates " +
                "prior to 1986, the calculated start date may not " +
                "be accurate." );
        }

        Console.WriteLine( "\nLocal time: {0}\n", 
            localZone.StandardName );

        Console.WriteLine( headFmt, "Year", "Start", "End", "Change" );
        Console.WriteLine( headFmt, "----", "-----", "---", "------" );

        CreateDaylightTime( 1960 );
        CreateDaylightTime( 1970 );
        CreateDaylightTime( 1980 );
        CreateDaylightTime( 1990 );
        CreateDaylightTime( 2000 );
        CreateDaylightTime( 2001 );
        CreateDaylightTime( 2002 );
        CreateDaylightTime( 2003 );
        CreateDaylightTime( 2004 );
        CreateDaylightTime( 2005 );
        CreateDaylightTime( 2020 );
        CreateDaylightTime( 2040 );
    } 
} 

/*
This example of TimeZone.GetDaylightChanges( int ) generates the
following output, which varies depending on the time zone in which
it is run. The example creates DaylightTime objects for specified
years and displays the start and end dates and time change for
daylight saving time.

Note: In the [en-US] culture, all start dates are calculated from
the first Sunday in April, based on a standard set in 1986. For
dates prior to 1986, the calculated start date may not be accurate.

Local time: Pacific Standard Time

Year   Start               End                 Change
----   -----               ---                 ------
1960   1960-04-03 02:00    1960-10-30 02:00    01:00:00
1970   1970-04-05 02:00    1970-10-25 02:00    01:00:00
1980   1980-04-06 02:00    1980-10-26 02:00    01:00:00
1990   1990-04-01 02:00    1990-10-28 02:00    01:00:00
2000   2000-04-02 02:00    2000-10-29 02:00    01:00:00
2001   2001-04-01 02:00    2001-10-28 02:00    01:00:00
2002   2002-04-07 02:00    2002-10-27 02:00    01:00:00
2003   2003-04-06 02:00    2003-10-26 02:00    01:00:00
2004   2004-04-04 02:00    2004-10-31 02:00    01:00:00
2005   2005-04-03 02:00    2005-10-30 02:00    01:00:00
2020   2020-04-05 02:00    2020-10-25 02:00    01:00:00
2040   2040-04-01 02:00    2040-10-28 02:00    01:00:00
*/ 


// Example of the TimeZone.GetDaylightChanges( int ) method.
import System.*;
import System.Globalization.*;

class DaylightChangesDemo
{
    // Get the local time zone and a base local time.
    private static TimeZone localZone = TimeZone.get_CurrentTimeZone();

    static void CreateDaylightTime(int year) 
    {
        // Create a DaylightTime object for the specified year.
        DaylightTime daylight = localZone.GetDaylightChanges(year);

         // Display the start and end dates and the time change.
        Console.WriteLine("{0,-7}{1,-20:yyyy-MM-dd HH:mm}"
            + "{2,-20:yyyy-MM-dd HH:mm}{3}", new Object[] {
            (System.Int32)year, daylight.get_Start(), daylight.get_End(),
            daylight.get_Delta() } );
    } //CreateDaylightTime

    public static void main(String[] args)
    {
        final String headFmt = "{0,-7}{1,-20}{2,-20}{3}";

        Console.WriteLine(("This example of TimeZone.GetDaylightChanges( int )"
            + " generates the \nfollowing output, which varies "
            + "depending on the time zone in which \nit is run. The " 
            + "example creates DaylightTime objects for specified \n" 
            + "years and displays the start and end dates and time " 
            + "change for \ndaylight saving time.\n"));

        // Write a message explaining that start dates prior to 1986 
        // in the en-US culture may not be correct.
        if(CultureInfo.get_CurrentCulture().get_Name()
            .equalsIgnoreCase("en-US")) {
                Console.WriteLine(("Note: In the [en-US] culture, all"
                    + " start dates are calculated from \nthe first Sunday in April, "
                    + "based on a standard set in 1986. For \ndates " 
                    + "prior to 1986, the calculated start date may not " 
                    + "be accurate."));
        }

        Console.WriteLine("\nLocal time: {0}\n", localZone.get_StandardName());
        Console.WriteLine(headFmt, new Object[] { "Year", "Start", "End",
            "Change" });
        Console.WriteLine(headFmt, new Object[] { "----", "-----", "---",
            "------" });

        CreateDaylightTime(1960);
        CreateDaylightTime(1970);
        CreateDaylightTime(1980);
        CreateDaylightTime(1990);
        CreateDaylightTime(2000);
        CreateDaylightTime(2001);
        CreateDaylightTime(2002);
        CreateDaylightTime(2003);
        CreateDaylightTime(2004);
        CreateDaylightTime(2005);
        CreateDaylightTime(2020);
        CreateDaylightTime(2040);
    } //main
} //DaylightChangesDemo

/*
This example of TimeZone.GetDaylightChanges( int ) generates the
following output, which varies depending on the time zone in which
it is run. The example creates DaylightTime objects for specified
years and displays the start and end dates and time change for
daylight saving time.

Note: In the [en-US] culture, all start dates are calculated from
the first Sunday in April, based on a standard set in 1986. For
dates prior to 1986, the calculated start date may not be accurate.

Local time: Pacific Standard Time

Year   Start               End                 Change
----   -----               ---                 ------
1960   1960-04-03 02:00    1960-10-30 02:00    01:00:00
1970   1970-04-05 02:00    1970-10-25 02:00    01:00:00
1980   1980-04-06 02:00    1980-10-26 02:00    01:00:00
1990   1990-04-01 02:00    1990-10-28 02:00    01:00:00
2000   2000-04-02 02:00    2000-10-29 02:00    01:00:00
2001   2001-04-01 02:00    2001-10-28 02:00    01:00:00
2002   2002-04-07 02:00    2002-10-27 02:00    01:00:00
2003   2003-04-06 02:00    2003-10-26 02:00    01:00:00
2004   2004-04-04 02:00    2004-10-31 02:00    01:00:00
2005   2005-04-03 02:00    2005-10-30 02:00    01:00:00
2020   2020-04-05 02:00    2020-10-25 02:00    01:00:00
2040   2040-04-01 02:00    2040-10-28 02:00    01:00:00
*/


System.Object
  System.Globalization.DaylightTime

Todos los miembros static (Shared en Visual Basic) públicos de este tipo son seguros para la ejecución de subprocesos. No se garantiza que los miembros de instancias sean seguros para la ejecución de subprocesos.

Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile para Smartphone, Windows Mobile para Pocket PC, Xbox 360

.NET Framework y .NET Compact Framework no admiten todas las versiones de cada plataforma. Para obtener una lista de las versiones compatibles, vea Requisitos de sistema de .NET Framework.

.NET Framework

Compatible con: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Compatible con: 3.5, 2.0, 1.0

XNA Framework

Compatible con: 2.0, 1.0

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