VB.NET

Unzip Some Files by Iterating over Entries

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Demonstrates how to unzip specific files by iterating over entries in a .zip. VB.NET

Dim success As Boolean = False

' This requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim zip As New Chilkat.Zip

' Open a .zip containing:
' 
' a1.xml
' b1.xml
' c1.xml
' dir1/a2.xml
' dir1/c2.xml
' dir2/dir3/c3.xml

' We wish to unzip only a1.xml, b1.xml, and c1.xml
success = zip.OpenZip("qa_data/zips/xml_files.zip")
If (success = False) Then
    Debug.WriteLine(zip.LastErrorText)
    Exit Sub
End If


Dim sbFilename As New Chilkat.StringBuilder

Dim entry As New Chilkat.ZipEntry
Dim numEntries As Integer = zip.NumEntries
Dim i As Integer = 0
While i < numEntries
    zip.EntryAt(i,entry)

    Dim entryFilePath As String = entry.FileName
    Debug.WriteLine(entryFilePath)

    If (entry.IsDirectory = False) Then
        sbFilename.SetString(entryFilePath)
        If (sbFilename.Contains("/",False) = False) Then
            ' Does not contain "/"
            ' Unzip to the qa_output directory.
            success = entry.Extract("qa_output")
            If (success = False) Then
                Debug.WriteLine("Failed to unzip " & entryFilePath)
            Else
                Debug.WriteLine("Unzipped " & entryFilePath)
            End If

        End If

    End If


    i = i + 1
End While