DateTimeOffset.ToOffset(TimeSpan) Método

Definição

Namespace:

System

Assembly:

System.Runtime.dll

Origem:

DateTimeOffset.cs

Converte o valor do objeto DateTimeOffset atual na data e hora especificada por um valor de deslocamento.

public:
 DateTimeOffset ToOffset(TimeSpan offset);

public DateTimeOffset ToOffset (TimeSpan offset);

member this.ToOffset : TimeSpan -> DateTimeOffset

Public Function ToOffset (offset As TimeSpan) As DateTimeOffset

Parâmetros

offset

TimeSpan

O deslocamento para se converter o valor DateTimeOffset.

Retornos

DateTimeOffset

Um objeto igual ao objeto DateTimeOffset original (ou seja, seus métodos ToUniversalTime() retornam pontos idênticos no tempo), mas cuja propriedade Offset está definida como offset.

Exceções

ArgumentException

O objeto resultante DateTimeOffset tem um DateTime valor anterior a DateTimeOffset.MinValue.

-ou-

O objeto resultante DateTimeOffset tem um DateTime valor posterior a DateTimeOffset.MaxValue.

ArgumentOutOfRangeException

offset é menor que -14 horas.

- ou -

offset é maior que 14 horas.

Exemplos

O exemplo a seguir ilustra como usar o ToOffset método para converter um DateTimeOffset objeto em um DateTimeOffset objeto com um deslocamento diferente.

using System;

public class DateTimeOffsetConversion
{
   private static DateTimeOffset sourceTime;

   public static void Main()
   {
      DateTimeOffset targetTime;
      sourceTime = new DateTimeOffset(2007, 9, 1, 9, 30, 0,
                                      new TimeSpan(-5, 0, 0));

      // Convert to same time (return sourceTime unchanged)
      targetTime = sourceTime.ToOffset(new TimeSpan(-5, 0, 0));
      ShowDateAndTimeInfo(targetTime);

      // Convert to UTC (0 offset)
      targetTime = sourceTime.ToOffset(TimeSpan.Zero);
      ShowDateAndTimeInfo(targetTime);

      // Convert to 8 hours behind UTC
      targetTime = sourceTime.ToOffset(new TimeSpan(-8, 0, 0));
      ShowDateAndTimeInfo(targetTime);

      // Convert to 3 hours ahead of UTC
      targetTime = sourceTime.ToOffset(new TimeSpan(3, 0, 0));
      ShowDateAndTimeInfo(targetTime);
   }

   private static void ShowDateAndTimeInfo(DateTimeOffset newTime)
   {
      Console.WriteLine("{0} converts to {1}", sourceTime, newTime);
      Console.WriteLine("{0} and {1} are equal: {2}",
                        sourceTime, newTime, sourceTime.Equals(newTime));
      Console.WriteLine("{0} and {1} are identical: {2}",
                        sourceTime, newTime,
                        sourceTime.EqualsExact(newTime));
      Console.WriteLine();
   }
}
//
// The example displays the following output:
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 9:30:00 AM -05:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 9:30:00 AM -05:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 9:30:00 AM -05:00 are identical: True
//
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 2:30:00 PM +00:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 2:30:00 PM +00:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 2:30:00 PM +00:00 are identical: False
//
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 6:30:00 AM -08:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 6:30:00 AM -08:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 6:30:00 AM -08:00 are identical: False
//
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 5:30:00 PM +03:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 5:30:00 PM +03:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 5:30:00 PM +03:00 are identical: False

open System

let sourceTime = DateTimeOffset(2007, 9, 1, 9, 30, 0, TimeSpan(-5, 0, 0))

let showDateAndTimeInfo newTime =
    printfn $"{sourceTime} converts to {newTime}"
    printfn $"{sourceTime} and {newTime} are equal: {sourceTime.Equals newTime}"
    printfn $"{sourceTime} and {newTime} are identical: {sourceTime.EqualsExact newTime}\n"

[<EntryPoint>]
let main _ =
    // Convert to same time (return sourceTime unchanged)
    let targetTime = sourceTime.ToOffset(TimeSpan(-5, 0, 0))
    showDateAndTimeInfo targetTime

    // Convert to UTC (0 offset)
    let targetTime = sourceTime.ToOffset TimeSpan.Zero
    showDateAndTimeInfo targetTime

    // Convert to 8 hours behind UTC
    let targetTime = sourceTime.ToOffset(TimeSpan(-8, 0, 0))
    showDateAndTimeInfo targetTime

    // Convert to 3 hours ahead of UTC
    let targetTime = sourceTime.ToOffset(TimeSpan(3, 0, 0))
    showDateAndTimeInfo targetTime

    0

// The example displays the following output:
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 9:30:00 AM -05:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 9:30:00 AM -05:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 9:30:00 AM -05:00 are identical: True
//
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 2:30:00 PM +00:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 2:30:00 PM +00:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 2:30:00 PM +00:00 are identical: False
//
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 6:30:00 AM -08:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 6:30:00 AM -08:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 6:30:00 AM -08:00 are identical: False
//
//    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 5:30:00 PM +03:00
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 5:30:00 PM +03:00 are equal: True
//    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 5:30:00 PM +03:00 are identical: False

Module DateTimeOffsetConversion
   Private sourceTime As New DateTimeOffset(#9/1/2007 9:30AM#, _
                                            New TimeSpan(-5, 0, 0))
   
   Public Sub Main()
      Dim targetTime As DateTimeOffset
      
      ' Convert to same time (return sourceTime unchanged)
      targetTime = sourceTime.ToOffset(New TimeSpan(-5, 0, 0))
      ShowDateAndTimeInfo(targetTime)
      
      ' Convert to UTC (0 offset)
      targetTime = sourceTime.ToOffset(TimeSpan.Zero)
      ShowDateAndTimeInfo(targetTime)
      
      ' Convert to 8 hours behind UTC
      targetTime = sourceTime.ToOffset(New TimeSpan(-8, 0, 0))
      ShowDateAndTimeInfo(targetTime)
      
      ' Convert to 3 hours ahead of UTC
      targetTime = sourceTime.ToOffset(New TimeSpan(3, 0, 0))
      ShowDateAndTimeInfo(targetTime)
   End Sub
   
   Private Sub ShowDateAndTimeInfo(newTime As DateTimeOffset)
      Console.WriteLine("{0} converts to {1}", sourceTime, newTime)
      Console.WriteLine("{0} and {1} are equal: {2}", _
                        sourceTime, newTime, sourceTime.Equals(newTime))
      Console.WriteLine("{0} and {1} are identical: {2}", _
                        sourceTime, newTime, _
                        sourceTime.EqualsExact(newTime)) 
      Console.WriteLine()
   End Sub
End Module
'
' The example displays the following output:
'    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 9:30:00 AM -05:00
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 9:30:00 AM -05:00 are equal: True
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 9:30:00 AM -05:00 are identical: True
'    
'    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 2:30:00 PM +00:00
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 2:30:00 PM +00:00 are equal: True
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 2:30:00 PM +00:00 are identical: False
'    
'    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 6:30:00 AM -08:00
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 6:30:00 AM -08:00 are equal: True
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 6:30:00 AM -08:00 are identical: False
'    
'    9/1/2007 9:30:00 AM -05:00 converts to 9/1/2007 5:30:00 PM +03:00
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 5:30:00 PM +03:00 are equal: True
'    9/1/2007 9:30:00 AM -05:00 and 9/1/2007 5:30:00 PM +03:00 are identical: False

Comentários

O ToOffset método é uma alternativa para chamar o TimeZoneInfo.ConvertTime(DateTimeOffset, TimeZoneInfo) método . Pode ser útil para executar conversões simples de um fuso horário para outro quando os deslocamentos dos fusos horários do UTC (Tempo Universal Coordenado) são conhecidos. No entanto, como nem o objeto original DateTimeOffset nem o novo DateTimeOffset objeto retornado pela chamada de método estão inequívocomente relacionados a um fuso horário específico, o método não aplica nenhuma regra de ajuste de fuso horário na conversão.