Extract files from ZIP file with VBScript - vbscript

Question

When extracting files from a ZIP file I was using the following.
Sub Unzip(strFile)
' This routine unzips a file. NOTE: The files are extracted to a folder '
' in the same location using the name of the file minus the extension. '
' EX. C:\Test.zip will be extracted to C:\Test '
'strFile (String) = Full path and filename of the file to be unzipped. '
Dim arrFile
arrFile = Split(strFile, ".")
Set fso = CreateObject("Scripting.FileSystemObject")
fso.CreateFolder(arrFile(0) & "\ ")
pathToZipFile= arrFile(0) & ".zip"
extractTo= arrFile(0) & "\ "
set objShell = CreateObject("Shell.Application")
set filesInzip=objShell.NameSpace(pathToZipFile).items
objShell.NameSpace(extractTo).CopyHere(filesInzip)
fso.DeleteFile pathToZipFile, True
Set fso = Nothing
Set objShell = Nothing
End Sub 'Unzip
This was working, but now I get a "The File Exists" Error.
What is the reason for this? Are there any alternatives?

Answer 1

All above solutions are accurate, but they are not definitive.
If you are trying to extract a zipped file into a temporary folder, a folder that displays "Temporary Folder For YOURFILE.zip" will immediately be created (in C:\Documents and Settings\USERNAME\Local Settings\Temp) for EACH FILE contained within your ZIP file, which you are trying to extract.
That's right, if you have 50 files, it will create 50 folders within your temp directory.
But if you have 200 files, it will stop at 99 and crash stating - The File Exists.
..
Apparently, this does not occur on Windows 7 with the contributions I view above. But regardless, we can still have checks. Alright, so this is how you fix it:
'========================
'Sub: UnzipFiles
'Language: vbscript
'Usage: UnzipFiles("C:\dir", "extract.zip")
'Definition: UnzipFiles([Directory where zip is located & where files will be extracted], [zip file name])
'========================
Sub UnzipFiles(folder, file)
Dim sa, filesInzip, zfile, fso, i : i = 1
Set sa = CreateObject("Shell.Application")
Set filesInzip=sa.NameSpace(folder&file).items
For Each zfile In filesInzip
If Not fso.FileExists(folder & zfile) Then
sa.NameSpace(folder).CopyHere(zfile), &H100
i = i + 1
End If
If i = 99 Then
zCleanup(file, i)
i = 1
End If
Next
If i > 1 Then
zCleanup(file, i)
End If
fso.DeleteFile(folder&file)
End Sub
'========================
'Sub: zCleanup
'Language: vbscript
'Usage: zCleanup("filename.zip", 4)
'Definition: zCleanup([Filename of Zip previously extracted], [Number of files within zip container])
'========================
Sub zCleanUp(file, count)
'Clean up
Dim i, fso
Set fso = CreateObject("Scripting.FileSystemObject")
For i = 1 To count
If fso.FolderExists(fso.GetSpecialFolder(2) & "\Temporary Directory " & i & " for " & file) = True Then
text = fso.DeleteFolder(fso.GetSpecialFolder(2) & "\Temporary Directory " & i & " for " & file, True)
Else
Exit For
End If
Next
End Sub
And that's it, copy and paste those two functions into your VBScript hosted program and you should be good to go, on Windows XP & Windows 7.
Thanks!

Answer 2

You can use DotNetZip from VBScript.
To unpack an existing zipfile, overwriting any files that may exist:
WScript.echo("Instantiating a ZipFile object...")
Dim zip
Set zip = CreateObject("Ionic.Zip.ZipFile")
WScript.echo("Initialize (Read)...")
zip.Initialize("C:\Temp\ZipFile-created-from-VBScript.zip")
WScript.echo("setting the password for extraction...")
zip.Password = "This is the Password."
' set the default action for extracting an existing file
' 0 = throw exception
' 1 = overwrite silently
' 2 = don't overwrite (silently)
' 3 = invoke the ExtractProgress event
zip.ExtractExistingFile = 1
WScript.echo("extracting all files...")
Call zip.ExtractAll("extract")
WScript.echo("Disposing...")
zip.Dispose()
WScript.echo("Done.")
To create a new zipfile:
dim filename
filename = "C:\temp\ZipFile-created-from-VBScript.zip"
WScript.echo("Instantiating a ZipFile object...")
dim zip2
set zip2 = CreateObject("Ionic.Zip.ZipFile")
WScript.echo("using AES256 encryption...")
zip2.Encryption = 3
WScript.echo("setting the password...")
zip2.Password = "This is the Password."
WScript.echo("adding a selection of files...")
zip2.AddSelectedFiles("*.js")
zip2.AddSelectedFiles("*.vbs")
WScript.echo("setting the save name...")
zip2.Name = filename
WScript.echo("Saving...")
zip2.Save()
WScript.echo("Disposing...")
zip2.Dispose()
WScript.echo("Done.")

Answer 3

There's answers above which are perfectly correct, but I thought I'd wrap everything up into a full solution that I'm using:
strZipFile = "test.zip" 'name of zip file
outFolder = "." 'destination folder of unzipped files (must exist)
'If using full paths rather than relative to the script, comment the next line
pwd = Replace(WScript.ScriptFullName, WScript.ScriptName, "")
Set objShell = CreateObject( "Shell.Application" )
Set objSource = objShell.NameSpace(pwd+strZipFile).Items()
Set objTarget = objShell.NameSpace(pwd+outFolder)
intOptions = 256
objTarget.CopyHere objSource, intOptions
'Clean up
Set WshShell = CreateObject("Wscript.Shell")
tempfolder = WshShell.ExpandEnvironmentStrings("%temp%")
Set fso = CreateObject("Scripting.FileSystemObject")
Call fso.DeleteFolder(tempfolder + "\Temporary Directory 1 for " + strZipFile, True )

Answer 4

http://www.experts-exchange.com/Programming/Languages/Visual_Basic/VB_Script/Q_23022290.html
Check your temp directory. If you have 99 folders associated with this unzipping process, try deleting them.

Answer 5

I added the following code to the beginning of my unzip procedure to delete these directories before I unzip:
For i = 1 To 99
If aqFileSystem.Exists(GetAppPath("Local Settings", "") & "\Temp\Temporary Directory " & i & " for DialogState.zip") = True Then
result = aqFileSystem.ChangeAttributes(GetAppPath("Local Settings", "") & "\Temp\Temporary Directory " & i & " for DialogState.zip", 1 OR 2, aqFileSystem.fattrFree)
Call DelFolder(GetAppPath("Local Settings", "") & "\Temp\Temporary Directory " & i & " for DialogState.zip")
Else
Exit For
End If
Next