TimeZoneInfo.FromSerializedString(String) Método

  • Referencia

Definición

Espacio de nombres:
System
Ensamblado:
System.Runtime.dll
Ensamblado:
System.Core.dll
Ensamblado:
mscorlib.dll
Ensamblado:
netstandard.dll
Source:
TimeZoneInfo.cs
Source:
TimeZoneInfo.cs
Source:
TimeZoneInfo.cs

Deserializa una cadena para volver a crear un objeto TimeZoneInfo serializado original.

public:
 static TimeZoneInfo ^ FromSerializedString(System::String ^ source);
public static TimeZoneInfo FromSerializedString (string source);
static member FromSerializedString : string -> TimeZoneInfo
Public Shared Function FromSerializedString (source As String) As TimeZoneInfo

Parámetros

source
String

Representación de cadena del objeto TimeZoneInfo serializado.

Devoluciones

TimeZoneInfo

Objeto serializado original.

Excepciones

ArgumentException

El parámetro source es Empty.

ArgumentNullException

El parámetro source es una cadena nula.

SerializationException

No se puede deserializar el parámetro de origen en un objeto TimeZoneInfo.

Ejemplos

En el ejemplo siguiente se intenta recuperar la zona horaria Antártida/Polo Sur del sistema local. Si se produce un error, el código intenta recuperar información sobre la zona horaria de un archivo de texto en el directorio de la aplicación. Si se produce un error en este intento, el código crea la zona horaria y escribe información sobre la zona horaria en el archivo de texto.

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

Comentarios

Hay una alternativa a proporcionar todo el código necesario para crear una zona horaria que no se encuentra en el registro en Windows o en la biblioteca de ICU en Linux y macOS. Puede definir una zona horaria personalizada y usar el ToSerializedString método en un archivo ejecutable independiente o usar el programa de instalación de una aplicación para ahorrar la zona horaria como una cadena. A continuación, la aplicación puede recuperar esta cadena de su ubicación de almacenamiento y crear una instancia de ella mediante el FromSerializedString método .

Se aplica a

Consulte también