Loop thru all subfolders and list all files under each

[Bill Nguyen]

I need a VB routine to loop thru a select top folder to find all subfolders
and list all subfolders/files under each of these subfolders.
Any help is greatly appreciated.
Bill

 

[Herfried K. Wagner [MVP]]

I need a VB routine to loop thru a select top folder to find all subfolders
and list all subfolders/files under each of these subfolders.

<URL:http://dotnet.mvps.org/dotnet/samples/filesystem/FileSystemEnumerator.zip>

 

[Bill Nguyen]

I appreciated this but I really don't know where to start. The readme.txt
doesn't tell me a thing about how to get this going.
Any thing I have to do in order to get the demo running?

Bill

 

[Herfried K. Wagner [MVP]]

I appreciated this but I really don't know where to start. The readme.txt
doesn't tell me a thing about how to get this going.
Any thing I have to do in order to get the demo running?

I see, my sample is a bit "oversized". The listing below shows a reduced
version:

\\\
Imports System.IO

Friend Module Module1
Friend Sub Main()
EnumerateDirectory("C:\WINDOWS")
End Sub

Private Sub EnumerateDirectory(ByVal RootDirectory As String)

For Each s As String In Directory.GetFiles(RootDirectory)
Console.WriteLine("File found: " & s)
Next s
For Each s As String In Directory.GetDirectories(RootDirectory)

' Prevent enumeration of reparse points.
'
' Platform SDK: Storage -- Reparse Points
'
<URL:http://msdn.microsoft.com/library/en-us/fileio/base/reparse_points.asp>
'
' You can create an infinitely recursive directory tree
'
<URL:http://blogs.msdn.com/oldnewthing/archive/2004/12/27/332704.aspx>
If _
Not (File.GetAttributes(s) And FileAttributes.ReparsePoint)
= _
FileAttributes.ReparsePoint _
Then
Console.WriteLine("Directory found: " & s)
EnumerateDirectory(s)
End If
Next s
End Sub
End Module
///

 

[Bill Nguyen]

herfried;
I can't run any of your code in your application. It gave me some kind of
error!
Below is my newbie version but all it can do is to list all files in a
single-level directory.
How can I loop thru all directories to list files in lowest level folder and
move to the next?

Thanks a billion

Bill



Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click

Dim mDir, mFile, rootDir, mrootPath, mFolder, mFileName As String

Dim mCount As Integer

rootDir = "C:\windows"

' For Each s As String In Directory.GetFiles(rootDir)

For Each d As String In Directory.GetDirectories(rootDir)

'Console.WriteLine("File found: " & s)

'mSourceFile = .FileName.Substring(OpenFileDialog1.FileName.LastIndexOf("\")
+ 1)

mFolder = d.Substring(d.LastIndexOf("\") + 1)

mrootPath = d.Substring(0, d.LastIndexOf("\"))

mDir += mrootPath & "\" & mFolder & vbCrLf

For Each f As String In Directory.GetFiles(d)

mFileName = f.Substring(f.LastIndexOf("\") + 1)

'mrootPath = f.Substring(1, d.LastIndexOf("\"))

mFile += mFileName & vbCrLf

Next f

MsgBox(mFile)

mFile = ""

Next d

MsgBox(mDir)

End Sub

 

[Herfried K. Wagner [MVP]]

I can't run any of your code in your application. It gave me some kind of
error!

Error message?

 

[Chris Dunaway]

The whole purpose of Herfried's method was that it is a *recursive*
method, i. e. it calls itself. But you have removed the recursion and
therefore it only scans the first directory.

Here is Herfried's method again (slightly altered):

Imports System.IO

Friend Module Module1
Friend Sub Main()
EnumerateDirectory("C:\WINDOWS")
End Sub

Private Sub EnumerateDirectory(ByVal RootDirectory As String)

For Each s As String In Directory.GetFiles(RootDirectory)
'******* Perform task on file s here. Replace with your
own file
'******* manipulation code here
Next

For Each s As String In Directory.GetDirectories(RootDirectory)

'Correct me if I'm wrong Herfried but this line prevents
recursion into
'empty folders
If Not (File.GetAttributes(s) And
FileAttributes.ReparsePoint) = _
FileAttributes.ReparsePoint Then

'***** Perform work in folder s here. Replace with
your
'***** folder manipuation code here

'Notice we're calling ourself here to get data on child
folders
'This is the recursive part!
EnumerateDirectory(s)
End If
Next
End Sub
End Module


BTW: Why are you using substring parse out the portions of your
folders and filename? why not use the methods in the System.IO
namespace?

For example, instead of:

mrootPath = d.Substring(0, d.LastIndexOf("\"))

use this instead:

mrootPath = Path.GetPathRoot(d)

and instead of

mFileName = f.Substring(f.LastIndexOf("\") + 1)

use this instead:

mFileName = Path.GetFileName(f)

 

[Bill nguyen]

Chris;

Thanks for the tip.
mFileName = Path.GetFileName(f) worked great!

mrootPath = Path.GetPathRoot(d) only give me the root path. I need to get
the name of the folder at subsequent levels.
For example, the full path:

C:\Base\Level1\level2\level3\Level4\Filename.TXT
C:\Base is the base (root) dir.
I need to parse the folder name Level1 thru level4 and assign a
corresponding folder level ID 2,3,4) to these folders.

Any idea how to do this?
Thanks in advance.

Bill

 

[Guest]

C:\Base\Level1\level2\level3\Level4\Filename.TXT
C:\Base is the base (root) dir.
I need to parse the folder name Level1 thru level4 and assign a
corresponding folder level ID 2,3,4) to these folders.

Any idea how to do this?
Thanks in advance.

Do something like this (one I prepared earlier... you don't need to use XML.
To add the folder level counter add a line to increment a class-level counter
inside the recursion loop and include its value in the output:

Private Function GetFiles(ByRef XmlDoc As XmlDocument, ByRef ParentNode
As XmlElement, ByVal DirPath As String, Optional ByVal IncludeSubFolders As
Boolean = True) As XmlNode

Dim objFileInfo As FileInfo
Dim objDir As DirectoryInfo = New DirectoryInfo(DirPath)
Dim objSubFolder As DirectoryInfo

'add a node for each file
For Each objFileInfo In objDir.GetFiles()
Dim MyFileNode As XmlElement = XmlDoc.CreateElement("Node")
MyFileNode.SetAttribute("type", "file")
MyFileNode.SetAttribute("id", intCount.ToString)
intCount += 1
MyFileNode.SetAttribute("type", objFileInfo.Extension)
MyFileNode.SetAttribute("size", objFileInfo.Length.ToString)
MyFileNode.SetAttribute("text", objFileInfo.Name)
ParentNode.AppendChild(MyFileNode)
Next

'call recursively to do sub folders
'if you don't want this set optional
'parameter to false

'add the folder node
If IncludeSubFolders Then
For Each objSubFolder In objDir.GetDirectories()
Dim DirNode As XmlElement = XmlDoc.CreateElement("Node")
DirNode.SetAttribute("type", "folder")
DirNode.SetAttribute("id", intCount.ToString)
intCount += 1
DirNode.SetAttribute("text", objSubFolder.Name)
ParentNode.AppendChild(DirNode)
GetFiles(XmlDoc, DirNode, objSubFolder.FullName, True)
Next
End If

Return ParentNode

End Function