TimeZoneInfo.GetAmbiguousTimeOffsets 方法

參考

定義

命名空間:: System

組件:: System.Runtime.dll

組件:: System.Core.dll

組件:: mscorlib.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

傳回模稜兩可的日期和時間可能對應的日期和時間相關資訊。

多載

GetAmbiguousTimeOffsets(DateTime)	傳回模稜兩可的日期和時間可能對應的日期和時間相關資訊。
GetAmbiguousTimeOffsets(DateTimeOffset)	傳回模稜兩可的日期和時間可能對應的日期和時間相關資訊。

GetAmbiguousTimeOffsets(DateTime)

來源:: TimeZoneInfo.cs

來源:: TimeZoneInfo.cs

來源:: TimeZoneInfo.cs

傳回模稜兩可的日期和時間可能對應的日期和時間相關資訊。

public:
 cli::array <TimeSpan> ^ GetAmbiguousTimeOffsets(DateTime dateTime);

public TimeSpan[] GetAmbiguousTimeOffsets (DateTime dateTime);

member this.GetAmbiguousTimeOffsets : DateTime -> TimeSpan[]

Public Function GetAmbiguousTimeOffsets (dateTime As DateTime) As TimeSpan()

參數

dateTime: DateTime

日期和時間。

傳回

TimeSpan[]

物件的陣列，代表特定日期和時間可對應的國際標準時間 (UTC) 可能位移。

例外狀況

ArgumentException

dateTime 不是模稜兩可的時間。

範例

下列範例會定義名為 ShowPossibleUtcTimes 的方法，該方法會 GetAmbiguousTimeOffsets(DateTime) 使用方法，將模棱兩可的時間對應到其可能的對應國際標準時間 (UTC) 時間。

private void ShowPossibleUtcTimes(DateTime ambiguousTime, TimeZoneInfo timeZone)
{
   // Determine if time is ambiguous in target time zone
   if (!timeZone.IsAmbiguousTime(ambiguousTime))
   {
      Console.WriteLine("{0} is not ambiguous in time zone {1}.", 
                        ambiguousTime, 
                        timeZone.DisplayName);
   }
   else
   {
      // Display time and its time zone (local, UTC, or indicated by timeZone argument)
      string originalTimeZoneName; 
      if (ambiguousTime.Kind == DateTimeKind.Utc)
         originalTimeZoneName = "UTC";
      else if (ambiguousTime.Kind == DateTimeKind.Local)
         originalTimeZoneName = "local time";
      else
         originalTimeZoneName = timeZone.DisplayName;

      Console.WriteLine("{0} {1} maps to the following possible times:", 
                        ambiguousTime, originalTimeZoneName);
      // Get ambiguous offsets 
      TimeSpan[] offsets = timeZone.GetAmbiguousTimeOffsets(ambiguousTime);
      // Handle times not in time zone of timeZone argument
      // Local time where timeZone is not local zone
      if ((ambiguousTime.Kind == DateTimeKind.Local) && ! timeZone.Equals(TimeZoneInfo.Local)) 
         ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Local, timeZone);
      // UTC time where timeZone is not UTC zone   
      else if ((ambiguousTime.Kind == DateTimeKind.Utc) && ! timeZone.Equals(TimeZoneInfo.Utc))
         ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Utc, timeZone);

      // Display each offset and its mapping to UTC
      foreach (TimeSpan offset in offsets)
      {
         if (offset.Equals(timeZone.BaseUtcOffset))
            Console.WriteLine("If {0} is {1}, {2} UTC", ambiguousTime, timeZone.StandardName, ambiguousTime - offset);
         else
            Console.WriteLine("If {0} is {1}, {2} UTC", ambiguousTime, timeZone.DaylightName, ambiguousTime - offset);
      }
   }            
}

let showPossibleUtcTimes (ambiguousTime: DateTime) (timeZone: TimeZoneInfo) =
    // Determine if time is ambiguous in target time zone
    if not (timeZone.IsAmbiguousTime ambiguousTime) then
        printfn $"{ambiguousTime} is not ambiguous in time zone {timeZone.DisplayName}."
    else
        // Display time and its time zone (local, UTC, or indicated by timeZone argument)
        let originalTimeZoneName =
            match ambiguousTime.Kind with
            | DateTimeKind.Utc -> "UTC"
            | DateTimeKind.Local -> "local time"
            | _ -> timeZone.DisplayName

        printfn $"{ambiguousTime} {originalTimeZoneName} maps to the following possible times:"
        // Get ambiguous offsets 
        let offsets = timeZone.GetAmbiguousTimeOffsets ambiguousTime
        // Handle times not in time zone of timeZone argument
        // Local time where timeZone is not local zone
        let ambiguousTime =
            if (ambiguousTime.Kind = DateTimeKind.Local) && not (timeZone.Equals TimeZoneInfo.Local) then 
                TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Local, timeZone)
            // UTC time where timeZone is not UTC zone   
            elif (ambiguousTime.Kind = DateTimeKind.Utc) && not (timeZone.Equals TimeZoneInfo.Utc) then
                TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Utc, timeZone)
            else 
                ambiguousTime
        // Display each offset and its mapping to UTC
        for offset in offsets do
            if offset.Equals timeZone.BaseUtcOffset then
                printfn $"If {ambiguousTime} is {timeZone.StandardName}, {ambiguousTime - offset} UTC"
            else
                printfn $"If {ambiguousTime} is {timeZone.DaylightName}, {ambiguousTime - offset} UTC"

Private Sub ShowPossibleUtcTimes(ambiguousTime As Date, timeZone As TimeZoneInfo)
   ' Determine if time is ambiguous in target time zone
   If Not timeZone.IsAmbiguousTime(ambiguousTime) Then
      Console.WriteLine("{0} is not ambiguous in time zone {1}.", _
                        ambiguousTime, _
                        timeZone.DisplayName)
   Else
      ' Display time and its time zone (local, UTC, or indicated by timeZone argument)
      Dim originalTimeZoneName As String 
      If ambiguousTime.Kind = DateTimeKind.Utc Then
         originalTimeZoneName = "UTC"
      ElseIf ambiguousTime.Kind = DateTimeKind.Local Then
         originalTimeZoneName = "local time"
      Else
         originalTimeZoneName = timeZone.DisplayName
      End If      
      Console.WriteLine("{0} {1} maps to the following possible times:", _
                        ambiguousTime, originalTimeZoneName)
      ' Get ambiguous offsets 
      Dim offsets() As TimeSpan = timeZone.GetAmbiguousTimeOffsets(ambiguousTime)
      ' Handle times not in time zone of timeZone argument
      ' Local time where timeZone is not local zone
      If (ambiguousTime.Kind = DateTimeKind.Local) And Not timeZone.Equals(TimeZoneInfo.Local) Then
         ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Local, timeZone)
      ' UTC time where timeZone is not UTC zone   
      ElseIf (ambiguousTime.Kind = DateTimeKind.Utc) And Not timeZone.Equals(TimeZoneInfo.Utc) Then
         ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Utc, timeZone)
      End If       
      ' Display each offset and its mapping to UTC
      For Each offset As TimeSpan In offsets
         If offset.Equals(timeZone.BaseUtcOffset) Then
            Console.WriteLine("If {0} is {1}, {2} UTC", ambiguousTime, timeZone.StandardName, ambiguousTime - offset)
         Else
            Console.WriteLine("If {0} is {1}, {2} UTC", ambiguousTime, timeZone.DaylightName, ambiguousTime - offset)
         End If   
      Next
   End If            
End Sub

然後可以使用下列程式碼呼叫方法：

Console.WriteLine();
ShowPossibleUtcTimes(new DateTime(2007, 11, 4, 1, 0, 0), 
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"));
Console.WriteLine();
ShowPossibleUtcTimes(new DateTime(2007, 11, 4, 01, 00, 00, DateTimeKind.Local), 
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"));
Console.WriteLine();
ShowPossibleUtcTimes(new DateTime(2007, 11, 4, 00, 00, 00, DateTimeKind.Local), 
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"));
Console.WriteLine();                     
ShowPossibleUtcTimes(new DateTime(2007, 11, 4, 01, 00, 00, DateTimeKind.Unspecified), 
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"));
Console.WriteLine();
ShowPossibleUtcTimes(new DateTime(2007, 11, 4, 07, 00, 00, DateTimeKind.Utc), 
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"));
// 
// This example produces the following output if run in the Pacific time zone:
//
//    11/4/2007 1:00:00 AM (GMT-06:00) Central Time (US & Canada) maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//       
//    11/4/2007 1:00:00 AM Pacific Standard Time is not ambiguous in time zone (GMT-06:00) Central Time (US & Canada).
//     
//    11/4/2007 12:00:00 AM local time maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//    
//    11/4/2007 1:00:00 AM (GMT-06:00) Central Time (US & Canada) maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//       
//    11/4/2007 7:00:00 AM UTC maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//

printfn ""
showPossibleUtcTimes(DateTime(2007, 11, 4, 1, 0, 0)) (TimeZoneInfo.FindSystemTimeZoneById "Central Standard Time")
printfn ""
showPossibleUtcTimes (DateTime(2007, 11, 4, 01, 00, 00, DateTimeKind.Local)) (TimeZoneInfo.FindSystemTimeZoneById "Central Standard Time")
printfn ""
showPossibleUtcTimes (DateTime(2007, 11, 4, 00, 00, 00, DateTimeKind.Local)) (TimeZoneInfo.FindSystemTimeZoneById "Central Standard Time")
printfn ""                     
showPossibleUtcTimes (DateTime(2007, 11, 4, 01, 00, 00, DateTimeKind.Unspecified)) (TimeZoneInfo.FindSystemTimeZoneById "Central Standard Time")
printfn ""
showPossibleUtcTimes (DateTime(2007, 11, 4, 07, 00, 00, DateTimeKind.Utc)) (TimeZoneInfo.FindSystemTimeZoneById "Central Standard Time")

// This example produces the following output if run in the Pacific time zone:
//
//    11/4/2007 1:00:00 AM (GMT-06:00) Central Time (US & Canada) maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//       
//    11/4/2007 1:00:00 AM Pacific Standard Time is not ambiguous in time zone (GMT-06:00) Central Time (US & Canada).
//     
//    11/4/2007 12:00:00 AM local time maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//    
//    11/4/2007 1:00:00 AM (GMT-06:00) Central Time (US & Canada) maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//       
//    11/4/2007 7:00:00 AM UTC maps to the following possible times:
//    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
//    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
//

ShowPossibleUtcTimes(#11/4/2007 1:00:00#, TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"))
Console.WriteLine()
ShowPossibleUtcTimes(New Date(2007, 11, 4, 01, 00, 00, DateTimeKind.Local), _
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"))
Console.WriteLine()
ShowPossibleUtcTimes(New Date(2007, 11, 4, 00, 00, 00, DateTimeKind.Local), _
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"))
Console.WriteLine()                     
ShowPossibleUtcTimes(New Date(2007, 11, 4, 01, 00, 00, DateTimeKind.Unspecified), _
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"))
Console.WriteLine()
ShowPossibleUtcTimes(New Date(2007, 11, 4, 07, 00, 00, DateTimeKind.Utc), _
                     TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time"))
' 
' This example produces the following output if run in the Pacific time zone:
'
'    11/4/2007 1:00:00 AM (GMT-06:00) Central Time (US & Canada) maps to the following possible times:
'    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
'    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
' 
'    11/4/2007 1:00:00 AM Pacific Standard Time is not ambiguous in time zone (GMT-06:00) Central Time (US & Canada).
' 
'    11/4/2007 12:00:00 AM local time maps to the following possible times:
'    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
'    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
' 
'    11/4/2007 1:00:00 AM (GMT-06:00) Central Time (US & Canada) maps to the following possible times:
'    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
'    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC
' 
'    11/4/2007 7:00:00 AM UTC maps to the following possible times:
'    If 11/4/2007 1:00:00 AM is Central Standard Time, 11/4/2007 7:00:00 AM UTC
'    If 11/4/2007 1:00:00 AM is Central Daylight Time, 11/4/2007 6:00:00 AM UTC

備註

這個方法的精確行為取決於屬性與 TimeZoneInfo 物件之間的 Kind 關聯性，如下表所示。

TimeZoneInfo 物件類型	Kind 屬性值	行為
TimeZoneInfo.Local	DateTimeKind.Local 或 DateTimeKind.Unspecified	傳回的模棱兩可時間位移 `dateTime` 。
TimeZoneInfo.Local	DateTimeKind.Utc	`dateTime`轉換為當地時間，然後傳回該時間的模棱兩可時間位移。
TimeZoneInfo.Utc	任何值。	擲回 ArgumentException 。
任何其他時區。	Local 或 DateTimeKind.Utc	`dateTime`轉換為指定的時區，然後判斷該時間是否模棱兩可。
任何其他時區。	DateTimeKind.Unspecified	判斷指定的時區是否 `dateTime` 模棱兩可。

這個方法所傳回之陣列中的物件順序 TimeSpan 是未定義的。不過，您可以比較其值與時區的屬性，判斷哪個元素代表時區標準時間的 BaseUtcOffset 位移。若要將模棱兩可的時間對應至時區的標準時間，請參閱如何：解決模棱兩可的時間。

另請參閱

適用於

GetAmbiguousTimeOffsets(DateTimeOffset)

來源:: TimeZoneInfo.cs

來源:: TimeZoneInfo.cs

來源:: TimeZoneInfo.cs

傳回模稜兩可的日期和時間可能對應的日期和時間相關資訊。

public:
 cli::array <TimeSpan> ^ GetAmbiguousTimeOffsets(DateTimeOffset dateTimeOffset);

public TimeSpan[] GetAmbiguousTimeOffsets (DateTimeOffset dateTimeOffset);

member this.GetAmbiguousTimeOffsets : DateTimeOffset -> TimeSpan[]

Public Function GetAmbiguousTimeOffsets (dateTimeOffset As DateTimeOffset) As TimeSpan()

參數

dateTimeOffset: DateTimeOffset

日期和時間。

傳回

TimeSpan[]

物件的陣列，代表特定日期和時間可對應的國際標準時間 (UTC) 可能位移。

例外狀況

ArgumentException

dateTimeOffset 不是模稜兩可的時間。

備註

這個方法的精確行為取決於參數屬性 dateTimeOffset 與 TimeZoneInfo 物件之間的 Offset 關聯性。如果屬性的值 Offset 對應到目前時區的可能位移，該日期和時間的國際標準時間 (UTC) ，此方法會傳回可能的位移。否則，它會轉換成 dateTimeOffset 目前時區的時間，然後傳回該日期和時間的可能位移。

另請參閱

適用於

共用方式為

TimeZoneInfo.GetAmbiguousTimeOffsets 方法

定義

多載

GetAmbiguousTimeOffsets(DateTime)

參數

傳回

例外狀況

範例

備註

另請參閱

適用於

GetAmbiguousTimeOffsets(DateTimeOffset)

參數

傳回

例外狀況

備註

另請參閱

適用於

其他資源