using Application.FileDialog to rename a file in V

问题:

Using VBA. My script moves a file into a directory. If that filename already exists in the target directory, I want the user to be prompted to rename the source file (the one that's being moved) before the move is executed.

Because I want the user to know what other files are in the directory already (so they don't choose the name of another file that's already there), my idea is to open a FileDialog box listing the contents of the directory, so that the user can use the FileDialog box's native renaming capability. Then I'll loop that FileDialog until the source file and target file names are no longer the same.

Here's some sample code:

Sub testMoveFile()

Dim fso As FileSystemObject
Dim file1 As File
Dim file2 As File
Dim dialog As FileDialog

Set fso = New FileSystemObject
fso.CreateFolder "c:\dir1"
fso.CreateFolder "c:\dir2"
fso.CreateTextFile "c:\dir1\test.txt"
fso.CreateTextFile "c:\dir2\test.txt"
Set file1 = fso.GetFile("c:\dir1\test.txt")
Set file2 = fso.GetFile("c:\dir2\test.txt")

Set dialog = Application.FileDialog(msoFileDialogOpen)

While file1.Name = file2.Name
    dialog.InitialFileName = fso.GetParentFolderName(file2.Path)
    If dialog.Show = 0 Then
        Exit Sub
    End If
Wend

file1.Move "c:\dir2\" & file1.Name

End Sub

But when I rename file2 and click 'OK', I get an error:

Run-time error '53': File not found

and then going into the debugger shows that the value of file2.name is <File not found>.

I'm not sure what's happening here--is the object reference being lost once the file's renamed? Is there an easier way to let the user rename from a dialog that shows all files in the target directory? I'd also like to provide a default new name for the file, but I can't see how I'd do that using this method.

edit: at this point I'm looking into making a UserForm with a listbox that gets populated w/ the relevant filenames, and an input box with a default value for entering the new name. Still not sure how to hold onto the object reference once the file gets renamed, though.

回答1:

Here's a sample of using Application.FileDialog to return a filename that the user selected. Maybe it will help, as it demonstrates getting the value the user provided.

EDIT: Modified to be a "Save As" dialog instead of "File Open" dialog.

Sub TestFileDialog()
  Dim Dlg As FileDialog
  Set Dlg = Application.FileDialog(msoFileDialogSaveAs)

  Dlg.InitialFileName = "D:\Temp\Testing.txt"  ' Set suggested name for user
                                               ' This could be your "File2"

  If Dlg.Show = -1 Then
    Dim s As String
    s = Dlg.SelectedItems.Item(1)  ` Note that this is for single-selections!
  Else
    s = "No selection"
  End If
  MsgBox s
End Sub

Edit two: Based on comments, I cobbled together a sample that appears to do exactly what you want. You'll need to modify the variable assignments, of course, unless you're wanting to copy the same file from "D:\Temp" to "D:\Temp\Backup" over and over. :)

Sub TestFileMove()
  Dim fso As FileSystemObject

  Dim SourceFolder As String
  Dim DestFolder As String
  Dim SourceFile As String
  Dim DestFile As String

  Set fso = New FileSystemObject
  SourceFolder = "D:\Temp\"
  DestFolder = "D:\Temp\Backup\"
  SourceFile = "test.txt"
  Set InFile = fso.GetFile(SourceFolder & SourceFile)
  DestFile = DestFolder & SourceFile
  If fso.FileExists(DestFile) Then
    Dim Dlg As FileDialog
    Set Dlg = Application.FileDialog(msoFileDialogSaveAs)
    Dlg.InitialFileName = DestFile
    Do While True
      If Dlg.Show = 0 Then
        Exit Sub
      End If
      DestFile = Dlg.Item

      If Not fso.FileExists(DestFile) Then
        Exit Do
      End If
    Loop
  End If

  InFile.Move DestFile
End Sub

回答2:

Here's some really quick code that I knocked up but basically looks at it from a different angle. You could put a combobox on a userform and get it to list the items as the user types. Not pretty, but it's a start for you to make more robust. I have hardcoded the directory c:\ here, but this could come from a text box

Private Sub ComboBox1_KeyUp(ByVal KeyCode As MSForms.ReturnInteger, 
       ByVal Shift As Integer)

Dim varListing() As Variant
Dim strFilename As String
Dim strFilePart As String
Dim intFiles As Integer

ComboBox1.MatchEntry = fmMatchEntryNone

strFilePart = ComboBox1.Value

strFilename = Dir("C:\" & strFilePart & "*.*", vbDirectory)

Do While strFilename <> ""
    intFiles = intFiles + 1
    ReDim Preserve varListing(1 To intFiles)
    varListing(intFiles) = strFilename
    strFilename = Dir()
Loop

On Error Resume Next
ComboBox1.List() = varListing
On Error GoTo 0

ComboBox1.DropDown

End Sub

Hope this helps. On error resume next is not the best thing to do but in this example stops it erroring if the variant has no files