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Unzipping in Visual Basic .Net

P: n/a
Hello, I've been trying to unzip a file in Visual Basic .Net (03) but
I'm getting an error. I do get the destination directory and I do get
the first extracted file, but then it stops and I get an wrong local
header signature error. I've added the SharpZipLib.dll library to my
project, so that's what I'm using. The zip files contains 9 text

This is the error I get:
An unhandled exception of type 'ICSharpCode.SharpZipLib.ZipException'
occurred in sharpziplib.dll
Additional information: Wrong Local header signature-1826153501

I have the following in the top of my code:
Imports System
Imports System.IO
Imports ICSharpCode.SharpZipLib.Zip

This is what I have in my button:

Private Sub btnUnzip_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnUnzip.Click

Dim fileName As String = Path.GetFullPath("c:\")
Dim destPath As String = Path.GetFullPath("c:\unzipped\")

If Not Directory.Exists(destPath) Then
For Each s As String In Directory.GetFiles(destPath)
End If

Dim inStream As New ZipInputStream(File.OpenRead(fileName))
Dim outStream As FileStream

Dim entry As ZipEntry
Dim buff(2047) As Byte
Dim bytes As Integer

Do While True
entry = inStream.GetNextEntry() <==== This is where the
error occurs!
If entry Is Nothing Then
Exit Do
End If
outStream = File.Create(destPath + entry.Name, 2048)

Do While True
bytes = inStream.Read(buff, 0, 2048)
If bytes = 0 Then
Exit Do
End If
outStream.Write(buff, 0, bytes)
End Sub

Any help would be greatly appreciated.


Apr 4 '06 #1
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3 Replies

P: n/a
Hello again, I just want to point out that I created a new zip file
with Winzip with 2 text files in it and tested the code and it worked.
However, when I tested again the Zip file I actually need to unzip, I
still get the Wrong Local header signature-1826153501 error.

Apr 4 '06 #2

P: n/a
Can WinZip open the errant zip file?

Apr 4 '06 #3

P: n/a
Yes, Winzip can open the zip file I need with no problems.


Apr 4 '06 #4

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