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有没有办法在 VBA（本质上是 VB6）中查看文件，以便我知道文件何时被修改？- 与此类似，只是我不想知道文件何时未使用，只是何时修改。

我找到的答案建议使用“FileSystemWatcher”和 Win32 API“FindFirstChangeNotification”。我不知道如何使用这些，知道吗？

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4 回答 4

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好的，我在 VBA (VB6) 中组合了一个能够检测文件系统更改的解决方案。

Public objWMIService, colMonitoredEvents, objEventObject

'call this every 1 second to check for changes'
Sub WatchCheck()
On Error GoTo timeout
    If objWMIService Is Nothing Then InitWatch 'one time init'
    Do While True
        Set objEventObject = colMonitoredEvents.NextEvent(1) 
         '1 msec timeout if no events'
        MsgBox "got event"

        Select Case objEventObject.Path_.Class
            Case "__InstanceCreationEvent"
                MsgBox "A new file was just created: " & _
                    objEventObject.TargetInstance.PartComponent
            Case "__InstanceDeletionEvent"
                MsgBox "A file was just deleted: " & _
                    objEventObject.TargetInstance.PartComponent
            Case "__InstanceModificationEvent"
                MsgBox "A file was just modified: " & _
                    objEventObject.TargetInstance.PartComponent
        End Select
    Loop
Exit Sub
timeout:
    If Trim(Err.Source) = "SWbemEventSource" And Trim(Err.Description) = "Timed out" Then
        MsgBox "no events in the last 1 sec"
    Else
        MsgBox "ERROR watching"
    End If
End Sub

在上面复制并粘贴这个子，如果需要初始化全局变量，它会自动调用。

Sub InitWatch()
On Error GoTo initerr
    Dim watchSecs As Integer, watchPath As String
    watchSecs = 1 'look so many secs behind'
    watchPath = "c:\\\\scripts" 'look for changes in this dir'

    strComputer = "."
    Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
    Set colMonitoredEvents = objWMIService.ExecNotificationQuery _
        ("SELECT * FROM __InstanceOperationEvent WITHIN " & watchSecs & " WHERE " _
            & "Targetinstance ISA 'CIM_DirectoryContainsFile' and " _
                & "TargetInstance.GroupComponent= " _
                    & "'Win32_Directory.Name=""c:\\\\scripts""'")

    MsgBox "init done"
Exit Sub
initerr:
    MsgBox "ERROR during init - " & Err.Source & " -- " & Err.Description
End Sub
于 2009-10-19T06:25:03.960 回答
1

您应该考虑使用 WMI 临时事件使用者来观看文件，按照此处建议的方式，但将其缩小到特定文件而不是文件夹

（这是假设您不能只关注文件的修改日期属性..）

于 2009-10-18T22:26:28.557 回答
1

看看这里。该页面有一个“Watch Directory Demo”VB 示例，作者为 Bryan Stafford。

于 2009-10-18T22:30:09.543 回答
0

我把它带入 vb6,run,display:ERROR 观看。

于 2010-02-01T03:01:49.150 回答