检索本地计算机与UTC时间(使用VBA)偏移的当前小时数

时间:2018-06-09 07:52:04

标签: excel vba access-vba timezone timezone-offset

人们在多个时区使用我的项目。

为了转换时间戳,最简单的方法是使用VBA检索本地计算机与UTC 的当前小时数,以便转换时间戳?

1 个答案:

答案 0 :(得分:2)

这里有两种现成的方法可以检索当前的UTC时间偏移小时数,仅此而已:

方法一:使用'any'API

Option Explicit

Function hoursOffsetFromUTC() As Single
    'returns current #hours difference between UTC & Local System Time
    'On Error GoTo uError
    Dim xmlHTTP As Object, strUTC As String, dtUTC As Date
    Set xmlHTTP = CreateObject("MSXML2.XMLHTTP")
    xmlHTTP.Open "GET", "https://maps.googleapis.com/maps/api/" & _
        "timezone/json?location=" & Int(Rnd() * 99) & ",0&timestamp=" & Int(Rnd() * 99), False
    xmlHTTP.send 'send randomized reqeust to avoid cached results
    strUTC = Mid(xmlHTTP.getResponseHeader("date"), 6, 20)
    Set xmlHTTP = Nothing
    dtUTC = DateValue(strUTC) + TimeValue(strUTC)
    hoursOffsetFromUTC = Round((Now() - dtUTC) * 48, 0) / 2 'nearest 0.5
    Exit Function
uError:
    MsgBox "Couldn't get UTC time." & vbLf & vbLf & _
        "Err#" & Err & ": " & Err.Description, vbExclamation, "Error!"
End Function
  • 使用示例:MsgBox hoursOffsetFromUTC

方法二:使用Windows API

Private Type SYSTEMTIME
    wYear As Integer
    wMonth As Integer
    wDayOfWeek As Integer
    wDay As Integer
    wHour As Integer
    wMinute As Integer
    wSecond As Integer
    wMilliseconds As Integer
End Type

Private Type TIME_ZONE_INFORMATION
    Bias As LongPtr
    StandardName(0 To 31) As Integer
    StandardDate As SYSTEMTIME
    StandardBias As LongPtr
    DaylightName(0 To 31) As Integer
    DaylightDate As SYSTEMTIME
    DaylightBias As LongPtr
End Type

Private Declare PtrSafe Function GetTimeZoneInformation Lib "kernel32" _
    (lpTimeZoneInformation As TIME_ZONE_INFORMATION) As Long

Function hoursOffsetFromUTC_Win() As Single
    Dim TZI As TIME_ZONE_INFORMATION
    If GetTimeZoneInformation(TZI) = 2 Then
        hoursOffsetFromUTC_Win = 0 - ((TZI.Bias + TZI.DaylightBias) / 60)
    Else
        hoursOffsetFromUTC_Win = 0 - (TZI.Bias / 60)
    End If
End Function
  • 使用示例:MsgBox hoursOffsetFromUTC_Win

方法一代码较少但需要互联网连接。它使用随机数调用Google API以避免缓存,并忽略响应正文,它会抓取响应标头中返回的请求日期,并将其与本地系统时间进行比较。 (可以使用任何在标头中返回当前UTC / GMT的API。)

方法二需要使用Windows内部kernel32 API的功能声明两种类型和外部函数,但在没有互联网连接的情况下运行。

转换时间戳:

  • 将数字Unix /纪元时间戳转换为“Excel Time”:

    (时间戳/ 86400)+ 25569 = ExcelTime

  • 或者相反,从Excel到纪元时间戳:

    (ExcelTime - 25569)* 86400 =时间戳

(这些不包括时区调整,因此您可以根据需要添加/减去它。)

更多信息: