I wrote a post about iterating over a directory with a Dir loop awhile back and I just received an email asking about nested directories. I’m a big fan of nice, big flat directory structures, but I frequently run into nested data as well. Here’s a VB6 snippet to traverse a directory structure recursively. Keep in mind that there is a price to recursion because of the nesting. If you have massive amounts of deeply nested data, you may want to try a different approach. This has worked for me 99% of the time.
Quick Explanation starting from bottom.
The “ripSlashes” function simply appends on a “/” trailing forward slash if it is missing. The recurse function relies on it.
The “nestedDir” function takes three parameters:
- The first parameter is a variable you define in the subroutine or function that will call the nestedDir function. It is basically a holder for the data returned by the nestedDir function.
- The second parameter is simply the root directory you wish to recurse.
- The third parameter is the file extension you wish to grab.
Finally, I’ve got a small subroutine from an Excel Spreadsheet that simply writes out the full file paths into the first column of the spreadsheet. Hope this helps someone.
Sub getSomeFolders() 'get some data out of nested xml files and put into a spreadsheet, recursively
Dim colFiles As New Collection Dim x As Integer Dim vFile
nestedDir colFiles, "c:\scott\new files\", "*.xml"
For Each vFile In colFiles x = x + 1 Sheet1.Cells(x, 1) = vFile 'full path to the files you are recursing Next vFile
MsgBox "done" End Sub
Public Function nestedDir(colFiles As Collection, sFolder As String, sFileType As String) Dim sTemp As String Dim colFolders As New Collection Dim vFolderName As Variant
'Add files in sFolder matching sFileType to colFiles sFolder = ripSlashes(sFolder) sTemp = Dir(sFolder & sFileType) Do While sTemp <> vbNullString colFiles.Add sFolder & sTemp sTemp = Dir Loop
sTemp = Dir(sFolder, vbDirectory) Do While sTemp <> vbNullString If (sTemp <> ".") And (sTemp <> "..") Then If (GetAttr(sFolder & sTemp) And vbDirectory) <> 0 Then colFolders.Add sTemp End If End If sTemp = Dir Loop
'Call nestedDir for each subfolder in colFolders For Each vFolderName In colFolders Call nestedDir(colFiles, sFolder & vFolderName, sFileType) Next vFolderName
Public Function ripSlashes(sFolder As String) As String If Len(sFolder) > 0 Then If Right(sFolder, 1) = "\" Then ripSlashes = sFolder Else ripSlashes = sFolder & "\" End If End If End Function
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