如何测试PDF是否已经打开-使用Excel宏

Question

我们有一个生成发票的Excel电子表格。 现在，我们需要将电子表格转换为pdf，以便通过电子邮件发送给客户。

我编写了一个宏，“只需按一下按钮”就可以生成.pdf并将其显示（在Acrobat阅读器窗口中）。

但是，如果用户在Acrobat窗口仍处于打开状态时有意或无意中按下了按钮两次，则宏错误。

宏是：

Sub SaveAsPDF()
'
' SaveAsPDF Macro
'

'
    Application.Goto Reference:="Print_Area"

    sPath = ThisWorkbook.Path
    'add 'Document Properties' CustomerName & CustOrderRef to the pdf doc.
    ThisWorkbook.BuiltinDocumentProperties("title").Value = Range("H13").Value & "-ref:" & Range("H14") & "-" & FormatCurrency(Range("J115").Value, 2)

    'get Inv# and CustomerName
    'ThisFile = ThisWorkbook.Path & "\" & "Inv" & Range("H15").Value & "-" & Range("H13").Value & ".pdf"
    ThisFile = ThisWorkbook.Path & "\" & "Inv.pdf"

    MsgBox "The info. will now be copied to create a PDF Invoice." & vbCrLf & "Which will be saved in the 'Invoices' folder as:" & vbCrLf & ThisFile & vbCrLf & vbCrLf & "Please press OK, and when the PDF window opens - print 2 copies on Invoice Stationery." & vbCrLf & vbCrLf & "The PDF then can be closed.  (its already been saved)"
    '*** Note - this code arrors if pdf is already open !  ***


    'Create pdf. save it and display it on-screen - for user to print
    ActiveSheet.ExportAsFixedFormat _
                Type:=xlTypePDF, _
                filename:=ThisFile, _
                Quality:=xlQualityStandard, _
                IncludeDocProperties:=True, _
                IgnorePrintAreas:=False, _
                OpenAfterPublish:=True

    'save & close the spreadsheet
    ActiveWorkbook.Close SaveChanges:=True

    ThisWorkbook.Saved = True
    Application.Quit


End Sub




Function IsFileOpen(fileFullName As String)
    Dim FileNumber As Integer
    Dim errorNum As Integer

    'MgBox "123" & fileFullName

    On Error Resume Next
    FileNumber = FreeFile()   ' Assign a free file number.
    ' Attempt to open the file and lock it.
    Open fileFullName For Input Lock Read As #FileNumber
    Close FileNumber       ' Close the file.
    errorNum = Err         ' Assign the Error Number which occured
    On Error GoTo 0        ' Turn error checking on.
    ' Now Check and see which error occurred and based
    ' on that you can decide whether file is already
    ' open
    Select Case errorNum
        ' No error occurred so ErroNum is Zero (0)
        ' File is NOT already open by another user.
        Case 0
         IsFileOpen = False

        ' Error number for "Permission Denied." is 70
        ' File is already opened by another user.
        Case 70
            IsFileOpen = True

        ' For any other Error occurred
        Case Else
            Error errorNum
    End Select

End Function

我发现（在StackOverflow中）宏可以测试文件是否已打开（与另一个用户），其他人可以看到：上面的函数IsFileOpen 。 但是我不能让他们为我工作。 例如IsFileOpen错误与

错误errorNum

如何最好/最简单的测试：

1. 该文件存在吗？
2. 如果是这样，它已经可以阅读了吗？

Answer 1

尽管我意识到它本质上是相同的功能。 它似乎确实有所不同。...也许可以应用此方法，看看是否有帮助？

Public Function IsFileOpen(FileName As String, Optional ResultOnBadFile As Variant) As Variant

Dim FileNum As Integer
Dim ErrNum As Integer
Dim V As Variant

On Error Resume Next

If Trim(FileName) = vbNullString Then
    If IsMissing(ResultOnBadFile) = True Then
        IsFileOpen = False
    Else
        IsFileOpen = ResultOnBadFile
    End If
    Exit Function
End If

V = Dir(FileName, vbNormal)
If IsError(V) = True Then
    If IsMissing(ResultOnBadFile) = True Then
        IsFileOpen = False
    Else
        IsFileOpen = ResultOnBadFile
    End If
    Exit Function
ElseIf V = vbNullString Then
    If IsMissing(ResultOnBadFile) = True Then
        IsFileOpen = False
    Else
        IsFileOpen = ResultOnBadFile
    End If
    Exit Function
End If

FileNum = FreeFile()
Err.Clear
Open FileName For Input Lock Read As #FileNum
ErrNum = Err.Number

Close FileNum
On Error GoTo 0

Select Case ErrNum
    Case 0
        IsFileOpen = False
    Case 70
        IsFileOpen = True
    Case Else
        IsFileOpen = True
End Select

End Function

我这样称呼它：

If IsFileOpen(ActiveWorkbook.Path & "\" & Month(Date) & "-" & Year(Date) & ".pdf") = False Then 'rest of code. Obviously you have to change path and name to your needs.

Answer 2

对于“ 1.文件是否存在？” ：

Public Function fp_FilExs(pPne$) As Boolean
    fp_FilExs = CBool(LenB(Dir$(pPne, vbNormal)))
End Function

。

对于“ 2.如果是，它已经可以阅读了吗？” ：
请尝试以下代码。
Tools --> Options --> General --> Error Trapping选项
必须小于Break on all errors 。

但是，它并不是针对所有情况的全面解决方案。
例如，使用文本文件，在Notepad ++中打开甚至进行编辑时，它就无法工作...

Public Function fp_InUse(pPne$) As Boolean
Dim iFreFil%
    iFreFil = FreeFile
On Error Resume Next
    Open pPne For Input Lock Read Write As #iFreFil
    fp_InUse = CBool(Err.Number)
    Close #iFreFil
End Function

。
也请在这里查看更复杂的解决方案 ，
返回以下状态：

   Select Case bResult
      Case FILE_IN_USE
         Label1.Caption = "File in use"
      Case FILE_FREE
         Label1.Caption = "File is available"
      Case FILE_DOESNT_EXIST
         Label1.Caption = "File does not exist!"
   End Select

。