[RESOLVED] Unzip folder

[abdallahr]

Hi

I have the following error on the code, am working with Vb.Net 2005;
am trying to unzip zip files within a folder..

Any help please..

Many thanks

The errors state:

- Type 'Package' is not defined
- Name 'ZipPacakage' is not defined
- Type 'ZipPackagePart' is not defined
- Type 'ZipPackagePage' is not defined

Public Sub UnzipArchive(ByVal zipFile As String, ByVal UnzipLocation As String)

        If (Not zipFile Is Nothing And Not UnzipLocation Is Nothing) Then

            Dim zipFilePackage As Package
            zipFilePackage = ZipPackage.Open(zipFile, FileMode.Open, FileAccess.ReadWrite)

            ' Iterate through all the files in the collection 
            For Each contentFile As ZipPackagePart In zipFilePackage.GetParts()

                CreateFile(UnzipLocation, contentFile)

            Next

            zipFilePackage.Close()

            MessageBox.Show("Unzip Complete")

        End If

    End Sub

   Private Sub CreateFile(ByVal UnzipLocation As String, ByVal contentFile As ZipPackagePage)

        Dim ContentFilePath As String = String.Empty
        ContentFilePath = contentFile.Uri.OriginalString.Replace("/", Path.DirectorySeparatorChar)

        If (ContentFilePath.StartsWith(Path.DirectorySeparatorChar.ToString())) Then

            ContentFilePath = ContentFilePath.TrimStart(Path.DirectorySeparatorChar)
        End If

        ContentFilePath = Path.Combine(UnzipLocation, ContentFilePath)

        ' Check if folder already exists. If it does, delete it and create it. Otherwise, just create it 
        ' If directory exists = true 
        If (Directory.Exists(Path.GetDirectoryName(ContentFilePath)) = True) Then
            ' Delete directory and all files in it. Second parameter is a boolean for a recursive delete 
            ' It will delete all files in the folder and the folder. 
            Directory.Delete(Path.GetDirectoryName(ContentFilePath), True)
            Directory.CreateDirectory(Path.GetDirectoryName(ContentFilePath)) ' re-create the folder with no files in it 
        Else
            Directory.CreateDirectory(Path.GetDirectoryName(ContentFilePath))
        End If

        Dim NewFileStream As FileStream = File.Create(ContentFilePath)
        NewFileStream.Close()

        Dim content As Byte() = New Byte(contentFile.GetStream().Length - 1) {}

        contentFile.GetStream().Read(content, 0, content.Length)
        File.WriteAllBytes(ContentFilePath, content)

    End Sub

[Joacim Andersson]

You must add a reference to WindowsBase to use the System.IO.Packaging namespace.

[abdallahr]

I cant find WindowsBase in Reference section to import..
am working with Vb.Net 2005

any help please..

[Joacim Andersson]

That explains it. It was added in .Net 3.0 so it doesn't exist in 2.0. What you can do is to download ICSharpCode.SharpZipLib and use that instead. Of course it's a different component so you need to change your code.

[abdallahr]

Ok fine.. managed to download it succesfully and receive no errors..

However, at run time when I call UnzipArchive function by clicking the sub below;

  Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click

        UnzipArchive(Label1.Text, Label2.Text)

    End Sub

I received the error ;

UnauthorizedAccssException was unhandled
Access to the path 'F:\New Folder\Test' is denied

This path do exists..

Note:

Label1: 'F:\New Folder\Test'
Label2: 'F:\New Folder\Test'

Any help please

[Joacim Andersson]

Well, 'F:\New Folder\Test' doesn't sound as a zip file to me.

[techgnome]

Before continuing with this thread, I suggest people read this thread for some background paying particular attention to post #10 where he explains what he's trying to do.

-tg

[abdallahr]

Thanks techgnome..

Am not rying to unzip a file, am trying to unzip 100 zip files within a folder. Then copy the unzipped files to another folder..

Hope am clearer now...any assistance...

Thanks

[Joacim Andersson]

You have to loop through each zip file and unzip them.

For Each file In IO.Directory.GetFiles(Label1.Text, "*.zip")
    UnzipArchive(file, Label2.Text)
Next

[abdallahr]

I added in the btnclick as shown below but I receive the error;

  Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
        For Each File In IO.Directory.GetFiles(Label1.Text, "*.zip")
            UnzipArchive(File, Label2.Text)
        Next
    End Sub

'File' is a type and cannot be used as an expression

[Joacim Andersson]

For Each file As String In IO.Directory ...

[techgnome]

Thanks techgnome..

Am not rying to unzip a file, am trying to unzip 100 zip files within a folder. Then copy the unzipped files to another folder..

Hope am clearer now...any assistance...

Thanks

That's what you said in the other thread too... you were clear... apparently I was not... Specifically stated that you would need to get a list of all the zip files in the folder... there is no such thing as a zip folder... so right now... clear your head. Smack yourself around a few times and get the idea of unzipping a folder out of your head... go ahead... we'll wait. Now... re-read what you wrote: " unzip 100 zip files within a folder" ... even you'll admit that what you are doing is unzipping a file... the fact that you need to do it 100 times is a minor detail.

You have to loop through each zip file and unzip them.

For Each file In IO.Directory.GetFiles(Label1.Text, "*.zip")
    UnzipArchive(file, Label2.Text)
Next

Which is exactly what I told him the first time through...

I added in the btnclick as shown below but I receive the error;

  Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
        For Each File In IO.Directory.GetFiles(Label1.Text, "*.zip")
            UnzipArchive(File, Label2.Text)
        Next
    End Sub

'File' is a type and cannot be used as an expression

This is what happens when people copy code and try to use it w/o understanding what they are doing. Especially when the debug skills are minimal.

Yes, "file" is a type... so you can't use it as a variable name...
So look for where File is used:

  Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
        For Each File In IO.Directory.GetFiles(Label1.Text, "*.zip")
            UnzipArchive(File, Label2.Text)
        Next
    End Sub

and change the name of it...

  Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
        For Each myFile In IO.Directory.GetFiles(Label1.Text, "*.zip")
            UnzipArchive(myFile, Label2.Text)
        Next
    End Sub

now, to make it even better, myFile should have a type... but the IDE will catch that because you have option strict on.... right?

  Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
        For Each myFile as String In IO.Directory.GetFiles(Label1.Text, "*.zip")
            UnzipArchive(myFile, Label2.Text)
        Next
    End Sub

-tg

[abdallahr]

woow, thats so kind of you all.. Very nice explanation...Thank you

Just one more last question;

The unzip code I have which works perfectly is

Private Sub unzip(ByVal filename As String, ByVal targetdir As String, ByVal overwrite As Boolean, Optional ByVal password As String = "")
        Dim inputStrm As New ZipInputStream(File.OpenRead(filename))
        inputStrm.Password = password
        Dim nextEntry As ZipEntry = inputStrm.GetNextEntry()
        'loop through every file in zip
        While Not nextEntry Is Nothing
            'if no slash at end of nextentry.name, file isn't a directory
            If Not nextEntry.Name.LastIndexOf("/") = nextEntry.Name.Length - 1 Then
                'checks to make SURE the directory exists, sometimes they arent specified prior to their contents
                If nextEntry.Name.IndexOf("/") > 0 Then
                    If Not Directory.Exists(targetdir & "\" & nextEntry.Name.Replace("/", "\").Substring(0, nextEntry.Name.Replace("/", "\").LastIndexOf("\"))) Then
                        Directory.CreateDirectory(targetdir & "\" & nextEntry.Name.Replace("/", "\").Substring(0, nextEntry.Name.Replace("/", "\").LastIndexOf("\")))
                    End If
                End If
                Dim tmpStrm As FileStream
                Dim tmpBuffer(2048) As Byte
                Dim tmpLength As Integer = -1

                If overwrite = True Then
                    tmpStrm = New FileStream(Path.Combine(targetdir, nextEntry.Name), FileMode.Create)
                Else
                    tmpStrm = New FileStream(Path.Combine(targetdir, nextEntry.Name), FileMode.CreateNew)
                End If

                While True
                    tmpLength = inputStrm.Read(tmpBuffer, 0, tmpBuffer.Length)
                    If tmpLength > 0 Then
                        tmpStrm.Write(tmpBuffer, 0, tmpLength)
                    Else
                        Exit While
                    End If
                End While

                tmpStrm.Flush()
                tmpStrm.Close()

                nextEntry = inputStrm.GetNextEntry()
            Else
                'else, is a directory... createdirectory ensures directory exists
                Directory.CreateDirectory(targetdir & "\" & nextEntry.Name.Replace("/", "\"))
                nextEntry = inputStrm.GetNextEntry()
            End If
        End While

    End Sub

So, I changed the btnUnpackFolder Click Code to:

 Private Sub btnUnpackFolder_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUnpackFolder.Click
        For Each myFile as String In IO.Directory.GetFiles(Label1.Text, "*.zip")
            Unzip(myFile, Label2.Text)
        Next
    End Sub

Error:

Argument not specified for parameter 'overwrite' of 'Private Sub unzip (filename As String, targetdir As String, overwrite As Boolean, [password as String = ''])'.

Any help please

[techgnome]

ok... this goes back to the problem in your other thread... the sub UnZip expects THREE parameters... and you're only passing it two. you need to pass in the third parameter as well.

-tg

[abdallahr]

Thank you guys!!

Resolved...