TimeZoneInfo.ConvertTimeToUtc 方法

定义

将日期和时间转换为协调世界时 (UTC)。

重载

ConvertTimeToUtc(DateTime)

将指定的日期和时间转换为协调世界时 (UTC)。

ConvertTimeToUtc(DateTime, TimeZoneInfo)

将指定时区中的时间转换为协调世界时 (UTC)。

ConvertTimeToUtc(DateTime)

Source:
TimeZoneInfo.cs
Source:
TimeZoneInfo.cs
Source:
TimeZoneInfo.cs

将指定的日期和时间转换为协调世界时 (UTC)。

public:
 static DateTime ConvertTimeToUtc(DateTime dateTime);
public static DateTime ConvertTimeToUtc (DateTime dateTime);
static member ConvertTimeToUtc : DateTime -> DateTime
Public Shared Function ConvertTimeToUtc (dateTime As DateTime) As DateTime

参数

dateTime
DateTime

要转换的日期和时间。

返回

dateTime 参数对应的协调世界时 (UTC)。 DateTime 值的 Kind 属性始终设置为 Utc

例外

TimeZoneInfo.Local.IsInvalidDateTime( dateTime ) 返回 true

示例

下面的示例演示其属性DateTimeKind.Utc分别为 、 DateTimeKind.LocalDateTimeKind.Unspecified的时间值的Kind转换。 它还演示了不明确和无效时间的转换。

DateTime datNowLocal = DateTime.Now;
Console.WriteLine("Converting {0}, Kind {1}:", datNowLocal, datNowLocal.Kind);
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNowLocal), TimeZoneInfo.ConvertTimeToUtc(datNowLocal).Kind);
Console.WriteLine();

DateTime datNowUtc = DateTime.UtcNow;
Console.WriteLine("Converting {0}, Kind {1}", datNowUtc, datNowUtc.Kind);
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNowUtc), TimeZoneInfo.ConvertTimeToUtc(datNowUtc).Kind);
Console.WriteLine();

DateTime datNow = new DateTime(2007, 10, 26, 13, 32, 00);
Console.WriteLine("Converting {0}, Kind {1}", datNow, datNow.Kind);
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNow), TimeZoneInfo.ConvertTimeToUtc(datNow).Kind);
Console.WriteLine();

DateTime datAmbiguous = new DateTime(2007, 11, 4, 1, 30, 00);    
Console.WriteLine("Converting {0}, Kind {1}, Ambiguous {2}", datAmbiguous, datAmbiguous.Kind, TimeZoneInfo.Local.IsAmbiguousTime(datAmbiguous));
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datAmbiguous), TimeZoneInfo.ConvertTimeToUtc(datAmbiguous).Kind);
Console.WriteLine();

DateTime datInvalid = new DateTime(2007, 3, 11, 02, 30, 00);    
Console.WriteLine("Converting {0}, Kind {1}, Invalid {2}", datInvalid, datInvalid.Kind, TimeZoneInfo.Local.IsInvalidTime(datInvalid));
try
{
   Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datInvalid), TimeZoneInfo.ConvertTimeToUtc(datInvalid).Kind);
}
catch (ArgumentException e)
{   
   Console.WriteLine("   {0}: Cannot convert {1} to UTC.", e.GetType().Name, datInvalid);
}
Console.WriteLine();

DateTime datNearMax = new DateTime(9999, 12, 31, 22, 00, 00);
Console.WriteLine("Converting {0}, Kind {1}", datNearMax, datNearMax.Kind);
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNearMax), TimeZoneInfo.ConvertTimeToUtc(datNearMax).Kind);
Console.WriteLine();
//
// This example produces the following output if the local time zone 
// is Pacific Standard Time:
//
//    Converting 8/31/2007 2:26:28 PM, Kind Local:
//       ConvertTimeToUtc: 8/31/2007 9:26:28 PM, Kind Utc
//    
//    Converting 8/31/2007 9:26:28 PM, Kind Utc
//       ConvertTimeToUtc: 8/31/2007 9:26:28 PM, Kind Utc
//    
//    Converting 10/26/2007 1:32:00 PM, Kind Unspecified
//       ConvertTimeToUtc: 10/26/2007 8:32:00 PM, Kind Utc
//    
//    Converting 11/4/2007 1:30:00 AM, Kind Unspecified, Ambiguous True
//       ConvertTimeToUtc: 11/4/2007 9:30:00 AM, Kind Utc
//    
//    Converting 3/11/2007 2:30:00 AM, Kind Unspecified, Invalid True
//       ArgumentException: Cannot convert 3/11/2007 2:30:00 AM to UTC.
//    
//    Converting 12/31/9999 10:00:00 PM, Kind Unspecified
//       ConvertTimeToUtc: 12/31/9999 11:59:59 PM, Kind Utc
//
let datNowLocal = DateTime.Now
printfn $"Converting {datNowLocal}, Kind {datNowLocal.Kind}:"
printfn $"   ConvertTimeToUtc: {TimeZoneInfo.ConvertTimeToUtc datNowLocal}, Kind {TimeZoneInfo.ConvertTimeToUtc(datNowLocal).Kind}\n"

let datNowUtc = DateTime.UtcNow
printfn $"Converting {datNowUtc}, Kind {datNowUtc.Kind}"
printfn $"   ConvertTimeToUtc: {TimeZoneInfo.ConvertTimeToUtc datNowUtc}, Kind {TimeZoneInfo.ConvertTimeToUtc(datNowUtc).Kind}\n"

let datNow = DateTime(2007, 10, 26, 13, 32, 00)
printfn $"Converting {datNow}, Kind {datNow.Kind}"
printfn $"   ConvertTimeToUtc: {TimeZoneInfo.ConvertTimeToUtc datNow}, Kind {TimeZoneInfo.ConvertTimeToUtc(datNow).Kind}\n"

let datAmbiguous = DateTime(2007, 11, 4, 1, 30, 00)
printfn $"Converting {datAmbiguous}, Kind {datAmbiguous.Kind}, Ambiguous {TimeZoneInfo.Local.IsAmbiguousTime datAmbiguous}"
printfn $"   ConvertTimeToUtc: {TimeZoneInfo.ConvertTimeToUtc datAmbiguous}, Kind {TimeZoneInfo.ConvertTimeToUtc(datAmbiguous).Kind}\n"

let datInvalid = DateTime(2007, 3, 11, 02, 30, 00)    
printfn $"Converting {datInvalid}, Kind {datInvalid.Kind}, Invalid {TimeZoneInfo.Local.IsInvalidTime datInvalid}"
try
    printfn $"   ConvertTimeToUtc: {TimeZoneInfo.ConvertTimeToUtc datInvalid}, Kind {TimeZoneInfo.ConvertTimeToUtc(datInvalid).Kind}"
with :? ArgumentException as e ->
    printfn $"   {e.GetType().Name}: Cannot convert {datInvalid} to UTC."
printfn ""

let datNearMax = DateTime(9999, 12, 31, 22, 00, 00)
printfn $"Converting {datNearMax}, Kind {datNearMax.Kind}"
printfn $"   ConvertTimeToUtc: {TimeZoneInfo.ConvertTimeToUtc datNearMax}, Kind {TimeZoneInfo.ConvertTimeToUtc(datNearMax).Kind}\n"
//
// This example produces the following output if the local time zone 
// is Pacific Standard Time:
//
//    Converting 8/31/2007 2:26:28 PM, Kind Local:
//       ConvertTimeToUtc: 8/31/2007 9:26:28 PM, Kind Utc
//    
//    Converting 8/31/2007 9:26:28 PM, Kind Utc
//       ConvertTimeToUtc: 8/31/2007 9:26:28 PM, Kind Utc
//    
//    Converting 10/26/2007 1:32:00 PM, Kind Unspecified
//       ConvertTimeToUtc: 10/26/2007 8:32:00 PM, Kind Utc
//    
//    Converting 11/4/2007 1:30:00 AM, Kind Unspecified, Ambiguous True
//       ConvertTimeToUtc: 11/4/2007 9:30:00 AM, Kind Utc
//    
//    Converting 3/11/2007 2:30:00 AM, Kind Unspecified, Invalid True
//       ArgumentException: Cannot convert 3/11/2007 2:30:00 AM to UTC.
//    
//    Converting 12/31/9999 10:00:00 PM, Kind Unspecified
//       ConvertTimeToUtc: 12/31/9999 11:59:59 PM, Kind Utc
//
Dim datNowLocal As Date = Date.Now
Console.WriteLine("Converting {0}, Kind {1}:", datNowLocal, datNowLocal.Kind)
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNowLocal), TimeZoneInfo.ConvertTimeToUtc(datNowLocal).Kind)
Console.WriteLine()

Dim datNowUtc As Date = Date.UtcNow
Console.WriteLine("Converting {0}, Kind {1}", datNowUtc, datNowUtc.Kind)
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNowUtc), TimeZoneInfo.ConvertTimeToUtc(datNowUtc).Kind)
Console.WriteLine()

Dim datNow As Date = CDate("10/26/2007 1:32:00 PM")
Console.WriteLine("Converting {0}, Kind {1}", datNow, datNow.Kind)
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNow), TimeZoneInfo.ConvertTimeToUtc(datNow).Kind)
Console.WriteLine()

Dim datAmbiguous As Date = #11/4/2007 1:30:00AM#    
Console.WriteLine("Converting {0}, Kind {1}, Ambiguous {2}", datAmbiguous, datAmbiguous.Kind, TimeZoneInfo.Local.IsAmbiguousTime(datAmbiguous))
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datAmbiguous), TimeZoneInfo.ConvertTimeToUtc(datAmbiguous).Kind)
Console.WriteLine()

Dim datInvalid As Date = #03/11/2007 2:30:00AM#    
Console.WriteLine("Converting {0}, Kind {1}, Invalid {2}", datInvalid, datInvalid.Kind, TimeZoneInfo.Local.IsInvalidTime(datInvalid))
Try
   Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datInvalid), TimeZoneInfo.ConvertTimeToUtc(datInvalid).Kind)
Catch e As ArgumentException
   Console.WriteLine("   {0}: Cannot convert {1} to UTC.", e.GetType().Name, datInvalid)
End Try
Console.WriteLine()

Dim datNearMax As Date = #12/31/9999 10:00:00PM#
Console.WriteLine("Converting {0}, Kind {1}", datNearMax, datNearMax.Kind)
Console.WriteLine("   ConvertTimeToUtc: {0}, Kind {1}", TimeZoneInfo.ConvertTimeToUtc(datNearMax), TimeZoneInfo.ConvertTimeToUtc(datNearMax).Kind)
Console.WriteLine()
'
' This example produces the following output if the local time zone 
' is Pacific Standard Time:
'
'    Converting 8/31/2007 2:26:28 PM, Kind Local:
'       ConvertTimeToUtc: 8/31/2007 9:26:28 PM, Kind Utc
'    
'    Converting 8/31/2007 9:26:28 PM, Kind Utc
'       ConvertTimeToUtc: 8/31/2007 9:26:28 PM, Kind Utc
'    
'    Converting 10/26/2007 1:32:00 PM, Kind Unspecified
'       ConvertTimeToUtc: 10/26/2007 8:32:00 PM, Kind Utc
'    
'    Converting 11/4/2007 1:30:00 AM, Kind Unspecified, Ambiguous True
'       ConvertTimeToUtc: 11/4/2007 9:30:00 AM, Kind Utc
'    
'    Converting 3/11/2007 2:30:00 AM, Kind Unspecified, Invalid True
'       ArgumentException: Cannot convert 3/11/2007 2:30:00 AM to UTC.
'    
'    Converting 12/31/9999 10:00:00 PM, Kind Unspecified
'       ConvertTimeToUtc: 12/31/9999 11:59:59 PM, Kind Utc

注解

所执行的确切转换取决于 参数属性dateTime的值Kind,如下表所示。

DateTime.Kind 属性 转换
DateTimeKind.Local 从本地时间转换为协调世界时 (UTC) 。
DateTimeKind.Unspecified dateTime假设 是本地时间,并且从本地时间转换为 UTC。
DateTimeKind.Utc 返回 dateTime 未更改的 。

如果 dateTime 对应于不明确的本地时间,此方法假定它是标准本地时间。 如果 dateTime 对应于无效的本地时间,则 方法将 ArgumentException引发 。

备注

如果当前计算机的本地时区包含多个调整规则,则 该方法的 ConvertTimeToUtc 重载可能会返回与 TimeZone.ToUniversalTimeDateTime.ToUniversalTime 方法不同的结果。 TimeZone.ToUniversalTime 始终将当前调整规则应用于时区转换,无论是否 dateTime 在其日期范围内。 在 .NET Framework 3.5 上执行时,DateTime.ToUniversalTime还会将当前调整规则应用于时区转换,无论dateTime是否在其日期范围内。

如果 的 UTC 等效项 dateTime 早于 DateTime.MinValue 或晚于 , DateTime.MaxValue则此方法分别返回 MinValueMaxValue

另请参阅

适用于

ConvertTimeToUtc(DateTime, TimeZoneInfo)

Source:
TimeZoneInfo.cs
Source:
TimeZoneInfo.cs
Source:
TimeZoneInfo.cs

将指定时区中的时间转换为协调世界时 (UTC)。

public:
 static DateTime ConvertTimeToUtc(DateTime dateTime, TimeZoneInfo ^ sourceTimeZone);
public static DateTime ConvertTimeToUtc (DateTime dateTime, TimeZoneInfo sourceTimeZone);
static member ConvertTimeToUtc : DateTime * TimeZoneInfo -> DateTime
Public Shared Function ConvertTimeToUtc (dateTime As DateTime, sourceTimeZone As TimeZoneInfo) As DateTime

参数

dateTime
DateTime

要转换的日期和时间。

sourceTimeZone
TimeZoneInfo

dateTime 的时区。

返回

dateTime 参数对应的协调世界时 (UTC)。 DateTime 对象的 Kind 属性始终设置为 Utc

例外

dateTime. KindUtcsourceTimeZone 不等于 Utc

dateTime. KindLocalsourceTimeZone 不等于 Local

- 或 -

sourceTimeZone .IsInvalidDateTime( dateTime ) 返回 true

sourceTimeZonenull

示例

以下示例从本地系统检索当前日期,并将其转换为协调世界时 (UTC) ,然后将其转换为东京标准时间,最后从东京标准时间转换回 UTC。 请注意,这两个 UTC 时间相同。

using System;

public class Example
{
   public static void Main()
   {
      // Get time in local time zone 
      DateTime thisTime = DateTime.Now;
      Console.WriteLine("Time in {0} zone: {1}", TimeZoneInfo.Local.IsDaylightSavingTime(thisTime) ?
                        TimeZoneInfo.Local.DaylightName : TimeZoneInfo.Local.StandardName, thisTime);
      Console.WriteLine("   UTC Time: {0}", TimeZoneInfo.ConvertTimeToUtc(thisTime, TimeZoneInfo.Local));
      // Get Tokyo Standard Time zone
      TimeZoneInfo tst = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
      DateTime tstTime = TimeZoneInfo.ConvertTime(thisTime, TimeZoneInfo.Local, tst);      
      Console.WriteLine("Time in {0} zone: {1}", tst.IsDaylightSavingTime(tstTime) ?
                        tst.DaylightName : tst.StandardName, tstTime);
      Console.WriteLine("   UTC Time: {0}", TimeZoneInfo.ConvertTimeToUtc(tstTime, tst));
   }
}
// The example displays output like the following when run on a system in the
// U.S. Pacific Standard Time zone:
//       Time in Pacific Standard Time zone: 12/6/2013 10:57:51 AM
//          UTC Time: 12/6/2013 6:57:51 PM
//       Time in Tokyo Standard Time zone: 12/7/2013 3:57:51 AM
//          UTC Time: 12/6/2013 6:57:51 PM
open System

// Get time in local time zone 
let thisTime = DateTime.Now
printfn $"Time in {if TimeZoneInfo.Local.IsDaylightSavingTime thisTime then TimeZoneInfo.Local.DaylightName else TimeZoneInfo.Local.StandardName} zone: {thisTime}"
printfn $"   UTC Time: {TimeZoneInfo.ConvertTimeToUtc(thisTime, TimeZoneInfo.Local)}"
// Get Tokyo Standard Time zone
let tst = TimeZoneInfo.FindSystemTimeZoneById "Tokyo Standard Time"
let tstTime = TimeZoneInfo.ConvertTime(thisTime, TimeZoneInfo.Local, tst)      
printfn $"Time in {if tst.IsDaylightSavingTime tstTime then tst.DaylightName else tst.StandardName} zone: {tstTime}"
printfn $"   UTC Time: {TimeZoneInfo.ConvertTimeToUtc(tstTime, tst)}"
// The example displays output like the following when run on a system in the
// U.S. Pacific Standard Time zone:
//       Time in Pacific Standard Time zone: 12/6/2013 10:57:51 AM
//          UTC Time: 12/6/2013 6:57:51 PM
//       Time in Tokyo Standard Time zone: 12/7/2013 3:57:51 AM
//          UTC Time: 12/6/2013 6:57:51 PM
Module Example
   Public Sub Main()
      ' Get time in local time zone 
      Dim thisTime As Date = Date.Now
      Console.WriteLine("Time in {0} zone: {1}", IIf(TimeZoneInfo.Local.IsDaylightSavingTime(thisTime), 
                        TimeZoneInfo.Local.DaylightName, TimeZoneInfo.Local.StandardName), thisTime)
      Console.WriteLine("   UTC Time: {0}", TimeZoneInfo.ConvertTimeToUtc(thisTime, TimeZoneInfo.Local))
      ' Get Tokyo Standard Time zone
      Dim tst As TimeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time")
      Dim tstTime As Date = TimeZoneInfo.ConvertTime(thisTime, TimeZoneInfo.Local, tst)      
      Console.WriteLine("Time in {0} zone: {1}", IIf(tst.IsDaylightSavingTime(tstTime), 
                        tst.DaylightName, tst.StandardName), tstTime)
      Console.WriteLine("   UTC Time: {0}", TimeZoneInfo.ConvertTimeToUtc(tstTime, tst))
   End Sub
End Module
' The example displays output like the following when run on a system in the U.S.
' Pacific Standard Time zone:
'    Time in Pacific Standard Time zone: 12/6/2013 10:57:51 AM
'       UTC Time: 12/6/2013 6:57:51 PM
'    Time in Tokyo Standard Time zone: 12/7/2013 3:57:51 AM
'       UTC Time: 12/6/2013 6:57:51 PM

注解

Kind如果 参数的 dateTime 属性等于 DateTimeKind.UtcsourceTimeZone 参数等于 TimeZoneInfo.Utc,则此方法返回 dateTime ,而不执行任何转换。

如果 dateTime 对应于不明确的时间,则此方法假定它是源时区的标准时间。 如果 dateTime 对应于无效时间,此方法将 ArgumentException引发 。

如果协调世界时 (UTC) 等效 dateTime 项早于 DateTime.MinValue 或晚于 , DateTime.MaxValue则此方法分别返回 MinValueMaxValue

另请参阅

适用于