TimeZone.CurrentTimeZone プロパティとは何？わかりやすく解説 Weblio辞書

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.NET Framework クラスライブラリリファレンス

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TimeZone.CurrentTimeZone プロパティ

現在のコンピュータシステムのタイムゾーンを取得します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Shared ReadOnly Property
 CurrentTimeZone As TimeZone

Visual Basic (使用法)

Dim value As TimeZone

value = TimeZone.CurrentTimeZone

public static TimeZone CurrentTimeZone { get;
 }

C++

public:
static property TimeZone^ CurrentTimeZone {
    TimeZone^ get ();
}

/** @property */
public static TimeZone get_CurrentTimeZone
 ()

JScript

public static function get
 CurrentTimeZone () : TimeZone

プロパティ値
現在のローカルタイムゾーンを表す TimeZone インスタンス。

使用例

CurrentTimeZone プロパティを参照し、ローカルタイムゾーンの標準時間と夏時間の名前を表示するコード例を次に示します。

Visual Basic

' Example of selected TimeZone class elements.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic

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 Standard Time
' 
' Current date and time:        2003-05-05 12:38
' Daylight saving time?         True
' Coordinated Universal Time:   2003-05-05 19:38
' UTC offset:                   -07:00:00
' 
' Daylight saving time for year 2003:
' 2003-04-06 02:00 to 2003-10-26 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 Standard Time

Current date and time:        2003-05-08 11:10
Daylight saving time?         True
Coordinated Universal Time:   2003-05-08 18:10
UTC offset:                   -07:00:00

Daylight saving time for year 2003:
2003-04-06 02:00 to 2003-10-26 02:00, delta: 01:00:00
*/

C++

// 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 Standard Time

Current date and time:        2003-05-08 11:11
Daylight saving time?         True
Coordinated Universal Time:   2003-05-08 18:11
UTC offset:                   -07:00:00

Daylight saving time for year 2003:
2003-04-06 02:00 to 2003-10-26 02:00, delta: 01:00:00
*/

// Example of selected TimeZone class elements.
import System.*;
import System.Globalization.*;

class TimeZoneDemo
{
    public static void main(String[]
 args)
    {
        final String dataFmt = "{0,-30}{1}";
        final 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.get_CurrentTimeZone();
        DateTime currentDate = DateTime.get_Now();
        int currentYear = currentDate.get_Year();

        // Display the names for standard time and daylight saving 
        // time for the local time zone.
        Console.WriteLine(dataFmt, "Standard time name:",
            localZone.get_StandardName());
        Console.WriteLine(dataFmt, "Daylight saving time name:",
            localZone.get_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?",
            String.valueOf(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}:", 
            String.valueOf(currentYear));
        Console.WriteLine("{0:yyyy-MM-dd HH:mm} to " + 
            "{1:yyyy-MM-dd HH:mm},delta: {2}",
            daylight.get_Start(), daylight.get_End(),
            daylight.get_Delta());
    } //main
} //TimeZoneDemo

/*
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 Standard Time

Current date and time:        2003-05-08 11:10
Daylight saving time?         True
Coordinated Universal Time:   2003-05-08 18:10
UTC offset:                   -07:00:00

Daylight saving time for year 2003:
2003-04-06 02:00 to 2003-10-26 02:00, delta: 01:00:00
*/

プラットフォーム

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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
TimeZone クラス
TimeZone メンバ
System 名前空間

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TimeZone.CurrentTimeZone プロパティとは？わかりやすく解説