TimeZone.GetDaylightChanges-Methode
Gibt den Zeitraum mit Sommerzeit für ein bestimmtes Jahr zurück.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public MustOverride Function GetDaylightChanges ( _
year As Integer _
) As DaylightTime
'Usage
Dim instance As TimeZone
Dim year As Integer
Dim returnValue As DaylightTime
returnValue = instance.GetDaylightChanges(year)
public abstract DaylightTime GetDaylightChanges (
int year
)
public:
virtual DaylightTime^ GetDaylightChanges (
int year
) abstract
public abstract DaylightTime GetDaylightChanges (
int year
)
public abstract function GetDaylightChanges (
year : int
) : DaylightTime
Parameter
- year
Das Jahr, auf das sich der Zeitraum mit Sommerzeit bezieht.
Rückgabewert
Eine System.Globalization.DaylightTime-Instanz, die Beginn und Ende der Sommerzeit im Jahr year enthält.
Ausnahmen
| Ausnahmetyp | Bedingung |
|---|---|
year ist kleiner als 1 oder größer als 9999. |
Hinweise
Es wird nur ein Zeitraum mit Sommerzeit pro Jahr unterstützt.
Wenn in der aktuellen Zeitzone keine Sommerzeit gilt, wird ein Wert von DaylightTime zurückgegeben, wobei Start und End den Wert DateTime.MinValue haben und der Wert von DaylightTime.Delta eine mit 0 (null) Ticks initialisierte TimeSpan ist.
Beispiel
Im folgenden Codebeispiel werden mithilfe der GetDaylightChanges-Methode der Zeitraum der Sommerzeit und der Offset für ausgewählte Jahre zurückgegeben.
' Example of the TimeZone.GetDaylightChanges( Integer ) method.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic
Module DaylightChangesDemo
' Get the local time zone and a base local time.
Dim localZone As TimeZone = TimeZone.CurrentTimeZone
Sub CreateDaylightTime( year As Integer )
' Create a DaylightTime object for the specified year.
Dim daylight As DaylightTime = _
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 )
End Sub
Sub Main( )
Const headFmt As String = "{0,-7}{1,-20}{2,-20}{3}"
Console.WriteLine( _
"This example of TimeZone.GetDaylightChanges( " & _
"Integer ) generates the " & vbCrLf & "following " & _
"output, which varies depending on the time zone " & _
"in which " & vbCrLf & "it is run. The example " & _
"creates DaylightTime objects for specified " & _
vbCrLf & "years and displays the start and end dates " & _
"and time change for " & vbCrLf & "daylight " & _
"saving time." & vbCrLf )
' 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" Then
Console.WriteLine( _
"Note: In the [en-US] culture, all start dates " & _
"are calculated from " & vbCrLf & "the first " & _
"Sunday in April, based on a standard set in " & _
"1986. For " & vbCrLf & "dates prior to 1986, " & _
"the calculated start date may not be accurate." )
End If
Console.WriteLine( vbCrLf & "Local time: {0}" & vbCrLf, _
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 )
End Sub
End Module
' This example of TimeZone.GetDaylightChanges( Integer ) 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.
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.
using namespace System;
using namespace System::Globalization;
void CreateDaylightTime( int year, TimeZone^ localZone )
{
// 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 );
}
int main()
{
String^ headFmt = "{0,-7}{1,-20}{2,-20}{3}";
// Get the local time zone.
TimeZone^ localZone = TimeZone::CurrentTimeZone;
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.
// ( CultureInfo::CurrentCulture->Name == S"en-US" ) returns False.
if ( CultureInfo::CurrentCulture->Name->CompareTo( "en-US" ) == 0 )
{
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, localZone );
CreateDaylightTime( 1970, localZone );
CreateDaylightTime( 1980, localZone );
CreateDaylightTime( 1990, localZone );
CreateDaylightTime( 2000, localZone );
CreateDaylightTime( 2001, localZone );
CreateDaylightTime( 2002, localZone );
CreateDaylightTime( 2003, localZone );
CreateDaylightTime( 2004, localZone );
CreateDaylightTime( 2005, localZone );
CreateDaylightTime( 2020, localZone );
CreateDaylightTime( 2040, localZone );
}
/*
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
*/
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0
Siehe auch
Referenz
TimeZone-Klasse
TimeZone-Member
System-Namespace
Int32-Struktur