TimeZoneInfo.ToSerializedString メソッド

public:
 System::String ^ ToSerializedString();

public string ToSerializedString ();

member this.ToSerializedString : unit -> string

Public Function ToSerializedString () As String

戻り値

現在の TimeZoneInfo オブジェクトを表す文字列。

例

次の例では、ローカル システムから南極/南極のタイム ゾーンを取得しようとします。 失敗した場合、コードはアプリケーション ディレクトリ内のテキスト ファイルからタイム ゾーンに関する情報の取得を試みます。 この試行が失敗した場合、コードはタイム ゾーンを作成し、それに関する情報をテキスト ファイルに書き込みます。

private TimeZoneInfo InitializeTimeZone()
{
   TimeZoneInfo southPole = null;
   // Determine if South Pole time zone is defined in system
   try
   {
      southPole = TimeZoneInfo.FindSystemTimeZoneById("Antarctica/South Pole Standard Time");
   }
   // Time zone does not exist; create it, store it in a text file, and return it
   catch
   {
      const string filename = @".\TimeZoneInfo.txt";
      bool found = false;
      
      if (File.Exists(filename))
      {
         StreamReader reader = new StreamReader(filename);
         string timeZoneInfo;
         while (reader.Peek() >= 0)
         {
            timeZoneInfo = reader.ReadLine();
            if (timeZoneInfo.Contains("Antarctica/South Pole"))
            {
               southPole = TimeZoneInfo.FromSerializedString(timeZoneInfo);
               reader.Close();
               found = true;
               break;
            }   
         }
      }
      if (! found)
      {               
         // Define transition times to/from DST
         TimeZoneInfo.TransitionTime startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 2, 0, 0), 10, 1, DayOfWeek.Sunday); 
         TimeZoneInfo.TransitionTime endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 2, 0, 0), 3, 3, DayOfWeek.Sunday);
         // Define adjustment rule
         TimeSpan delta = new TimeSpan(1, 0, 0);
         TimeZoneInfo.AdjustmentRule adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(new DateTime(1989, 10, 1), DateTime.MaxValue.Date, delta, startTransition, endTransition);
         // Create array for adjustment rules
         TimeZoneInfo.AdjustmentRule[] adjustments = {adjustment};
         // Define other custom time zone arguments
         string displayName = "(GMT+12:00) Antarctica/South Pole";
         string standardName = "Antarctica/South Pole Standard Time";
         string daylightName = "Antarctica/South Pole Daylight Time";
         TimeSpan offset = new TimeSpan(12, 0, 0);
         southPole = TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName, daylightName, adjustments);
         // Write time zone to the file
         StreamWriter writer = new StreamWriter(filename, true);
         writer.WriteLine(southPole.ToSerializedString());
         writer.Close();
      }
   }
   return southPole;
}

let initializeTimeZone () =
    // Determine if South Pole time zone is defined in system
    try
        TimeZoneInfo.FindSystemTimeZoneById "Antarctica/South Pole Standard Time"
    // Time zone does not exist create it, store it in a text file, and return it
    with _ ->
        let filename = @".\TimeZoneInfo.txt"
        let mutable southPole = Unchecked.defaultof<TimeZoneInfo>
        let mutable found = false
        
        if File.Exists filename then
            use reader = new StreamReader(filename)
            while reader.Peek() >= 0 && not found do
                let timeZoneInfo = reader.ReadLine()
                if timeZoneInfo.Contains "Antarctica/South Pole" then
                    southPole <- TimeZoneInfo.FromSerializedString timeZoneInfo
                    reader.Close()
                    found <- true
        if not found then
            // Define transition times to/from DST
            let startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(DateTime(1, 1, 1, 2, 0, 0), 10, 1, DayOfWeek.Sunday) 
            let endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(DateTime(1, 1, 1, 2, 0, 0), 3, 3, DayOfWeek.Sunday)
            // Define adjustment rule
            let delta = TimeSpan(1, 0, 0)
            let adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(DateTime(1989, 10, 1), DateTime.MaxValue.Date, delta, startTransition, endTransition)
            // Create array for adjustment rules
            let adjustments = [| adjustment |]
            // Define other custom time zone arguments
            let displayName = "(GMT+12:00) Antarctica/South Pole"
            let standardName = "Antarctica/South Pole Standard Time"
            let daylightName = "Antarctica/South Pole Daylight Time"
            let offset = TimeSpan(12, 0, 0)
            southPole <- TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName, daylightName, adjustments)
            // Write time zone to the file
            use writer = new StreamWriter(filename, true)
            writer.WriteLine(southPole.ToSerializedString())
        southPole

Private Function InitializeTimeZone() As TimeZoneInfo
   Dim southPole As TimeZoneInfo = Nothing
   ' Determine if South Pole time zone is defined in system
   Try
      southPole = TimeZoneInfo.FindSystemTimeZoneById("Antarctica/South Pole Standard Time")
   ' Time zone does not exist; create it, store it in a text file, and return it
   Catch e As TimeZoneNotFoundException
      Dim found As Boolean
      Const filename As String = ".\TimeZoneInfo.txt"
      
      If File.Exists(filename) Then
         Dim reader As StreamReader = New StreamReader(fileName)
         Dim timeZoneString As String
         Do While reader.Peek() >= 0
            timeZoneString = reader.ReadLine()
            If timeZoneString.Contains("Antarctica/South Pole") Then
               southPole = TimeZoneInfo.FromSerializedString(timeZoneString)
               reader.Close()
               found = True
               Exit Do
            End If   
         Loop
      End If
      If Not found Then               
         ' Define transition times to/from DST
         Dim startTransition As TimeZoneInfo.TransitionTime = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(#02:00:00#, 10, 1, DayOfWeek.Sunday) 
         Dim endTransition As TimeZoneInfo.TransitionTime = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(#02:00:00#, 3, 3, DayOfWeek.Sunday)
         ' Define adjustment rule
         Dim delta As TimeSpan = New TimeSpan(1, 0, 0)
         Dim adjustment As TimeZoneInfo.AdjustmentRule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(#10/01/1989#, Date.MaxValue.Date, delta, startTransition, endTransition)
         ' Create array for adjustment rules
         Dim adjustments() As TimeZoneInfo.AdjustmentRule = {adjustment}
         ' Define other custom time zone arguments
         Dim displayName As String = "(GMT+12:00) Antarctica/South Pole"
         Dim standardName As String = "Antarctica/South Pole Standard Time"
         Dim daylightName As String = "Antarctica/South Pole Daylight Time"
         Dim offset As TimeSpan = New TimeSpan(12, 0, 0)
         southPole = TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName, daylightName, adjustments)
         ' Write time zone to the file
         Dim writer As StreamWriter = New StreamWriter(filename, True)
         writer.WriteLine(southPole.ToSerializedString())
         writer.Close()
      End If
   End Try
   Return southPole
End Function

注釈

通常、Windows システムのレジストリまたは Linux および macOScan 上の ICU ライブラリ で定義されていないタイム ゾーンに依存するアプリケーションでは、 メソッドを CreateCustomTimeZone 使用して、必要なタイム ゾーンをオブジェクトとして TimeZoneInfo インスタンス化できます。 その後、アプリケーションは メソッドを ToSerializedString 呼び出して、タイム ゾーン オブジェクトを文字列に変換できます。

オブジェクトは TimeZoneInfo 、必要に応じてアプリケーションが取得できる場所にも格納する必要があります。 以下の場所が可能です。

• Windows システム上のレジストリ。

• アプリケーション リソース ファイル。

• テキスト ファイルなどの外部ファイル。

適用対象

こちらもご覧ください

• FromSerializedString(String)
• 方法: タイム ゾーンを埋め込みリソースに保存する