Parsing Zip Files VB.Net

Question

cellus205 0 Junior Poster in Training

16 Years Ago

Hows it going everyone. Right now I am working on a project with VS2008 that parses directory and subdirectories and lists all filenames/paths/size/etc. This is working correctly, but I also need to parse the contents of zip files without actually unzipping them. What would be the easiest method to return the information on the files in a zip file? (Filename, Size, etc). Heres the code that I currently have to parse directories and subdirectories.

Sub Parse(ByVal ThisFolder As String)
        FSO = New Scripting.FileSystemObject
        Dim soFolder As Folder
        Dim soFile As File
        Dim soFolders As Folders


        soFolder = FSO.GetFolder(ThisFolder)

        ' Files in this directory

        For Each soFile In soFolder.Files
            ' TestdbDataSet.Table1.Rows.Add(CStr(ThisFolder), CStr(soFile.Name), CStr(soFile.Type), CStr(soFile.Size))
            Table1TableAdapter.Insert(CStr(ThisFolder), CStr(soFile.Name), CStr(soFile.Type), CStr(soFile.Size))
        Next soFile

        ' Recurse Subdirectories
        soFolders = soFolder.SubFolders ' parses subfolders

        For Each soFolder In soFolders
            Parse(soFolder.Path)
        Next soFolder

        soFolders = Nothing
        soFolder = Nothing
        soFile = Nothing


    End Sub

vb.net

3 Contributors
6 Replies
200 Views
1 Week Discussion Span
Latest Post 16 Years Ago Latest Post by cellus205

dmf1978 8 Junior Poster in Training

16 Years Ago

Hi,
Take a look on this library DotNetZip.

Hope it helps.

Reply to this topic

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.

cellus205 0 Junior Poster in Training · Answer 1 · 2008-07-28T22:12:28+00:00

Is this library able to just list the files? I was reading over it and mostly only saw that it zipped and unzipped files, etc.

cellus205 0 Junior Poster in Training · Answer 2 · 2008-07-31T20:24:02+00:00

cellus205 0 Junior Poster in Training

16 Years Ago

bump

cellus205 0 Junior Poster in Training · Answer 3 · 2008-08-01T12:47:48+00:00

Can anyone help me convert this VB6 code to get zip filenames to .Net?

Option Explicit

    Const strStartPath = "C:\"
    Const strDestFile = "c:\output.txt"
    Const strDestTargetFile = "c:\outputTarget.txt"

    Dim dicList
        dicList = CreateObject("Scripting.Dictionary")
        dicList.Add(LCase("mp3"), "")
        dicList.Add(LCase("avi"), "")
        dicList.Add(LCase("wav"), "")



    Dim objFSO, strTempFolder, objDestFile, objDestTargetFile
        objFSO = CreateObject("Scripting.FileSystemObject")
        strTempFolder = CreateTempFolder()

    Dim strDest, strDestTarget
        strDest = ""
        strDestTarget = ""

        If objFSO.FileExists(strDestFile) Then objFSO.DeleteFile(strDestFile)
        If objFSO.FileExists(strDestTargetFile) Then objFSO.DeleteFile(strDestTargetFile)

        Call TraverseFolder(strStartPath)

        If objFSO.FolderExists(strTempFolder) Then objFSO.DeleteFolder(strTempFolder)



    Sub TraverseFolder(ByVal strFolderPath)
        Dim objCurrentFolder, objFile, objFolder
        objCurrentFolder = objFSO.GetFolder(strFolderPath)

        On Error Resume Next

        For Each objFile In objCurrentFolder.Files
            If Not Err() Then
                If LCase(objFSO.GetExtensionName(objFile)) = "zip" Then
                    Call UnZipAndCheckExtension(objFile, strTempFolder)
                End If
            Else
                Err.Clear()
            End If
        Next

        For Each objFolder In objCurrentFolder.subFolders
            If Not Err() Then
                Call TraverseFolder(objFolder.ParentFolder & "\" & objFolder.name)
            Else
                Err.Clear()
            End If
        Next

        On Error GoTo 0
    End Sub


    Function UnZipAndCheckExtension(ByVal strZipFile, ByVal strTempFolder)
        Const strUNZIPSource = "WZUNZIP.EXE"

        Dim objFSO, objShell, intRet
        objFSO = CreateObject("Scripting.FileSystemObject")
        If Not objFSO.FolderExists(strTempFolder) Then objFSO.CreateFolder(strTempFolder)
        objShell = CreateObject("WScript.shell")

        On Error Resume Next
        intRet = objShell.Run("""" & strUNZIPSource & """ -o """ & strZipFile & """ """ & strTempFolder & """", _
           0, True)
        If Err() Then
            On Error GoTo 0
            MsgBox(strZipFile & vbLf & Err.Description)
            Exit Function
        End If
        On Error GoTo 0

        Dim objFolder, objFile
        objFolder = objFSO.GetFolder(strTempFolder)

        strDest = "The following files are found in '" & strZipFile & "':" & vbLf
        strDestTarget = "The following special files are found in '" & strZipFile & "':" & vbLf

        For Each objFile In objFolder.Files
            strDest = strDest & "->" & objFSO.GetFileName(objFile) & vbLf

            If dicList.Exists(LCase(objFSO.GetExtensionName(objFile))) Then
                strDestTarget = strDestTarget & "->" & objFSO.GetFileName(objFile) & vbLf
            End If

            objFSO.DeleteFile(objFile)
        Next

        objDestFile = objFSO.OpenTextFile(strDestFile, 8, True)
        objDestFile.Write(strDest)
        objDestFile.Close()

        objDestTargetFile = objFSO.OpenTextFile(strDestTargetFile, 8, True)
        objDestTargetFile.Write(strDestTarget)
        objDestTargetFile.Close()
    End Function


    Function CreateTempFolder()
        Dim objFSO, strTempFile
        objFSO = CreateObject("Scripting.FileSystemObject")
        strTempFile = objFSO.GetTempName
        strTempFile = Replace(strTempFile, "." & objFSO.GetExtensionName(strTempFile), "")

        Dim objShell
        objShell = CreateObject("WScript.Shell")
        CreateTempFolder = Replace(objShell.SpecialFolders("Desktop"), "Desktop", "Local Settings\Temp") & _
            "\" & strTempFile
    End Function
    End Sub

Jask Azel 0 Newbie Poster · Answer 4 · 2008-08-01T16:30:32+00:00

Dont know if it worked but I had a go. THis is pretty much the same code in vb.net without errors.

Public Class Form1

Private Const strStartPath As String = "C:\"
Private Const strDestFile As String = "c:\output.txt"
Private Const strDestTargetFile As String = "c:\outputTarget.txt"
Private dicList As Object
Private objFSO As Object
Private strZipFile As String

Private Sub doit()

dicList = CreateObject("Scripting.Dictionary")
dicList.Add(LCase("mp3"), "")
dicList.Add(LCase("avi"), "")
dicList.Add(LCase("wav"), "")

Dim strTempFolder As String, objDestFile As Object, objDestTargetFile As Object

objFSO = CreateObject("Scripting.FileSystemObject")
strTempFolder = CreateTempFolder()

Dim strDest As String, strDestTarget As String

strDest = ""
strDestTarget = ""

If objFSO.FileExists(strDestFile) Then objFSO.DeleteFile(strDestFile)
If objFSO.FileExists(strDestTargetFile) Then objFSO.DeleteFile(strDestTargetFile)
Call TraverseFolder(strStartPath, strTempFolder)

If objFSO.FolderExists(strTempFolder) Then
objFSO.DeleteFolder(strTempFolder)
End If

Dim objFolder As Object, objFile As Object

objFolder = objFSO.GetFolder(strTempFolder)
strDest = "The following files are found in '" & strZipFile & "':" & vbLf
strDestTarget = "The following special files are found in '" & strZipFile & "':" & vbLf

For Each objFile In objFolder.Files
strDest = strDest & "->" & objFSO.GetFileName(objFile) & vbLf
If dicList.Items.Exists(LCase(objFSO.GetExtensionName(objFile))) Then
strDestTarget = strDestTarget & "->" & objFSO.GetFileName(objFile) & vbLf
End If
objFSO.DeleteFile(objFile)
Next

objDestFile = objFSO.OpenTextFile(strDestFile, 8, True)
objDestFile.Write(strDest)
objDestFile.Close()
objDestTargetFile = objFSO.OpenTextFile(strDestTargetFile, 8, True)
objDestTargetFile.Write(strDestTarget)
objDestTargetFile.Close()

End Sub

Function CreateTempFolder() As Object

Dim objFSO As Object, strTempFile As String
objFSO = CreateObject("Scripting.FileSystemObject")
strTempFile = objFSO.GetTempName
strTempFile = Replace(strTempFile, "." & objFSO.GetExtensionName(strTempFile), "")
Dim objShell As Object
objShell = CreateObject("WScript.Shell")
CreateTempFolder = Replace(objShell.SpecialFolders("Desktop"), "Desktop", "Local Settings\Temp") & "\" & strTempFile

' Return Nothing
End Function

Private Sub TraverseFolder(ByVal strFolderPath As String, ByVal strtempfolder As String)

Dim objCurrentFolder As Object, objFile As Object, objFolder As Object
objCurrentFolder = objFSO.GetFolder(strFolderPath)
On Error Resume Next

For Each objFile In objCurrentFolder.Files

If LCase(objFSO.GetExtensionName(objFile)) = "zip" Then
Call UnZipAndCheckExtension(objFile, strtempfolder)
End If

End Sub

Function UnZipAndCheckExtension(ByVal strZipFile As String, ByVal strTempFolder As String) As Object

Const strUNZIPSource As String = "WZUNZIP.EXE"
Dim objFSO As Object, objShell As Object, intRet As Integer
objFSO = CreateObject("Scripting.FileSystemObject")

If Not objFSO.FolderExists(strTempFolder) Then
objFSO.CreateFolder(strTempFolder)
objShell = CreateObject("WScript.shell")
On Error Resume Next
intRet = objShell.Run("""" & strUNZIPSource & """ -o """ & strZipFile & """ """ & strTempFolder & """", 0, True)
End If

Return Nothing
End Function

End Class

cellus205 0 Junior Poster in Training · Answer 5 · 2008-08-01T19:32:38+00:00

Hmm, getting a directory not found error when it gets here:

objFolder = objFSO.GetFolder(strTempFolder)
strDest = "The following files are found in '" & strZipFile & "':" & vbLf
strDestTarget = "The following special files are found in '" & strZipFile & "':" & vbLf