获取文件最后修改日期（资源管理器值不是 cmd 值）

Posted 2023-04-15

【中文标题】获取文件最后修改日期（资源管理器值不是 cmd 值）

【英文标题】：Getting file last modified date (explorer value not cmd value)

【发布时间】：2013-07-24 17:20:39

【问题描述】：

我已经编写了一些 Excel VBA 代码来将文件名、版本和上次修改日期/时间添加到工作表中。代码似乎工作正常，但有时文件的 Last Modified Date 的时间部分与我在资源管理器窗口中看到的时间相比正好向前或向后 1 小时。

我注意到如果我执行dir 命令，我的代码返回的值与 cmd 窗口中显示的修改日期/时间相同。

例如，如果我在 system32 文件夹中查找 dbghelp.dll 文件：

 C:\Windows\System32>dir dbghelp.*
 Volume in drive C has no label.
 Volume Serial Number is 16E8-4159

 Directory of C:\Windows\System32

 21/11/2010  04:24         1,087,488 dbghelp.dll
               1 File(s)      1,087,488 bytes
               0 Dir(s)  60,439,101,440 bytes free

 C:\Windows\System32>

但资源管理器窗口中的同一文件显示修改时间为 2010 年 11 月 21 日 03:24 - 提前 1 小时。

我写的代码是返回cmd窗口时间，而我想要资源管理器窗口时间：

    Sub GetFileDetails()
    Dim path As String
    Dim objFSO As Object
    Dim objFile As Object
    Dim objFolder As Object
    Dim loopCount As Integer
    Dim pathCheck As Boolean


    'Prompt for directory path
    path = InputBox(Prompt:="Enter file path", Title:="Enter file path", Default:="")
    If (path = "" Or path = vbNullString) Then
        MsgBox ("Invalid path - exiting")
        Exit Sub
    End If

    'Required for interacting with filesystem
    Set objFSO = CreateObject("Scripting.FileSystemObject")
    Set objFolder = objFSO.GetFolder(path)

    '1st row for path title, 2nd row for column headings
    loopCount = 3
    For Each objFile In objFolder.Files
        Range("A" & loopCount).Value = objFile.Name
        Range("B" & loopCount).Value = objFSO.GetFileVersion(objFile)
        Range("C" & loopCount).Value = objFile.DateLastModified

        'Combine Version and Modified
        If Range("B" & loopCount).Value <> "" Then
            Range("D" & loopCount).Value = Range("B" & loopCount).Value & ", " & Range("C" & loopCount).Value
        Else
            Range("D" & loopCount).Value = Range("C" & loopCount).Value
        End If

        loopCount = loopCount + 1
    Next

    'Set up headings
    Range("A" & 1).Value = (loopCount - 3) & " files found in " & path
    Range("A" & 2).Value = "FileName"
    Range("B" & 2).Value = "Version"
    Range("C" & 2).Value = "Modified"
    Range("D" & 2).Value = "Version & Modified"
End Sub

如果有人能对这个问题有所了解 - 我们将不胜感激。

===编辑=== 这是我想出的代码，它总是给我与资源管理器窗口中显示的时间相同的时间：

Sub GetFileDetails()
    Dim path As String
    Dim objFSO As Object
    Dim objFile As Object
    Dim objFolder As Object
    Dim loopCount As Integer
    Dim pathCheck As Boolean

    Dim modDate As Date
    Dim modHour As Integer
    Dim modMin As Integer

    'Prompt for directory path
    path = InputBox(Prompt:="Enter file path", Title:="Enter file path", Default:="")
    If (path = "" Or path = vbNullString) Then
        MsgBox ("Invalid path - exiting")
        Exit Sub
    End If

    'Required for interacting with filesystem
    Set objFSO = CreateObject("Scripting.FileSystemObject")
    Set objFolder = objFSO.GetFolder(path)

    '1st row for path title, 2nd row for column headings
    loopCount = 3
    For Each objFile In objFolder.Files
        Range("A" & loopCount).Value = objFile.Name
        Range("B" & loopCount).Value = objFSO.GetFileVersion(objFile)
        Range("D" & loopCount).Value = objFile.Name


        'The date modified time for files made in Summer Time are correct, whereas Winter Time will be 1 hour forward
        If (IsItSummerTime(objFile.DateLastModified) = True) Then
            Range("C" & loopCount).Value = objFile.DateLastModified
        Else
            modDate = Format(objFile.DateLastModified, "DD-MM-YYYY")
            modHour = Hour(objFile.DateLastModified)
            modMin = Minute(objFile.DateLastModified)

            modHour = modHour - 1

            If (modHour < 10) Then
               If (modMin < 10) Then
                  Range("C" & loopCount).Value = modDate & " 0" & modHour & ":0" & modMin
               Else
                  Range("C" & loopCount).Value = modDate & " 0" & modHour & ":" & modMin
               End If
            Else
               If (modMin < 10) Then
                  Range("C" & loopCount).Value = modDate & " " & modHour & ":0" & modMin
               Else
                  Range("C" & loopCount).Value = modDate & " " & modHour & ":" & modMin
               End If
            End If
        End If

        'Combine Version and Modified
        If Range("B" & loopCount).Value <> "" Then
            Range("E" & loopCount).Value = Range("B" & loopCount).Value & ", " & Range("C" & loopCount).Value
        Else
            Range("E" & loopCount).Value = Range("C" & loopCount).Value
        End If

        loopCount = loopCount + 1
    Next

    'Set up headings
    Range("A" & 1).Value = (loopCount - 3) & " files found in " & path
    Range("A" & 2).Value = "FileName"
    Range("B" & 2).Value = "Version"
    Range("C" & 2).Value = "Modified"
    Range("D" & 2).Value = "FileName"
    Range("E" & 2).Value = "Version & Modified"

End Sub

Function IsItSummerTime(inDate As Date) As Boolean
    Dim inDateYear As Integer
    Dim findFirstSunday As Date
    Dim firstSundayDate As Date
    Dim startDays As Integer
    Dim endDays As Integer
    Dim summerStart As Date
    Dim summerEnd As Date

    'Summer Time starts on the 13th week
    'Summer Time ends on the 42nd week
    If (IsItALeapYear(inDate) = True) Then
        startDays = (12 * 7) + 1
        endDays = (42 * 7) + 1
    Else
        startDays = 12 * 7
        endDays = 42 * 7
    End If

    'Find the date of the first Sunday in the year
    inDateYear = Year(inDate)
    For i = 1 To 7
        findFirstSunday = DateSerial(inDateYear, 1, i)
        If (Weekday(findFirstSunday) = 1) Then
            firstSundayDate = findFirstSunday
        End If
    Next i

    'Calculate the start and end dates for Summer Time
    summerStart = firstSundayDate + startDays
    summerEnd = firstSundayDate + endDays

    'Compare inDate to Summer Time values and return boolean value
    If (inDate >= summerStart And inDate < summerEnd) Then
        IsItSummerTime = True
    Else
        IsItSummerTime = False
    End If
End Function
Function IsItALeapYear(inDate As Date) As Boolean
    If (Month(DateSerial(Year(inDate), 2, 29))) = 2 Then
        IsItALeapYear = True
    Else
        IsItALeapYear = False
    End If
End Function

【问题讨论】：

也是一个很好的支持answer

见Why do Explorer and the command prompt interpret file times differently?

【参考方案1】：

看起来这最终是一个您必须解决的操作系统问题，就像已经显示的那样，特别是因为您已经编辑了代码以考虑 DST。

但您也可以使用 FileDateTime 函数。 help article 指出此函数的结果基于您系统的区域设置。 DateLastModified 属性的帮助文章没有提供任何此类警告，至少对于 Excel 在线帮助而言。

要修改上面编辑过的代码的摘录：

'1st row for path title, 2nd row for column headings
loopCount = 3
For Each objFile In objFolder.Files
    Range("A" & loopCount).Value = objFile.Name
    'use the full path name
    Range("B" & loopCount).Value = FileDateTime(objFile_fullpathname)
    Range("D" & loopCount).Value = objFile.Name