I have a .zip file created elsewhere that my app needs to unzip. The archive contains numerous files and folders (the file itself is about 350Mb zipped, 900Mb+ unzipped) of all different sizes and depths. When I have the Xceed component unzip it, everything seems fine, but there are a handful of folders and a couple files that don't get unpacked. The folders are empty folders (though still necessary) but not sure about the files.

 The code I am using (_ArchiveFile and _UnzipFolder are properties set prior to method execution):

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

        Try

            Cursor = Cursors.WaitCursor

            Dim zip As New ZipArchive(New DiskFile(_ArchiveFile))

            Dim folder As New DiskFolder(_UnzipFolder)

            zip.CopyFilesTo(folder, True, True)

        Catch ex As Exception

            Cursor = Cursors.Default

            Throw New Exception(String.Format("Unzip Failed:{0}{1}", vbCrLf, ex))

        Finally

            Cursor = Cursors.Default

        End Try

    End Sub

 

What is it I am doing or not doing (right/wrong) that could be causing this? Thanks

 -- Andrew 

Hi Andrew,

the answer to your question could according to the operating system you are running your application on.  If the application tries to go into a directory that can be seen from 'outside/above' but it does not have the credits (needs to be the owner/an administrator, for example) to read this directory's content, it won't.   In some cases, starting the application using "Run as administrator" could help. 

As far as I can know, the chances are that the behavior you are seeing is operating system related.  I know that this will sound trivial but when you open the archive to just look at the content, is everything there? 

There must be a logical explanation behind all this. 

---

Ghislain
Technical Support and software developer
Xceed Software Inc.
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Documentation Center : http://xceed.com/doc/
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I have also the same problem. I have zip file of around 600 MB and it contain 31 folders Out of 31 only 1 folder was empty. When I unzip uisng the Xceed component i got only 30 folders and the empty folder was missing. If I unzip manually I got 31 folders.

Even i execute the program and unzipping manually both under the same user account and the same location.

 Note: If list the folders in the zip file it gave 31 folders.

 Please find the code that used to extarct the file below

Dim zipFile As New DiskFile(zipFilename)

If Not zipFile.Exists Then

Throw New Exception("Zip file does not exists. The file name is " & zipFilename)

End If

'Create a ZipArchive object to access the zip file

Dim zip As New ZipArchive(zipFile)

'Create a DiskFolder object for the destination folder

Dim destinationFolder As New DiskFolder(destFolder)

'Copy the contents of the zip file to the destination folder

zip.CopyFilesTo(destinationFolder, True, True)