DotNetZip UnZip/Zip with file locations

[HunterTTP]

I've got the problem narrowed down, I just don't know how to fix it.

Here is an example code-

Variables for example:

Dim Username As String = Environment.UserName
    Dim AppData As String = "C:\Users\" & Username & "\AppData\Roaming"

Zip and UnZip subs:

Public Sub MyZip(ByVal ContentFolder As String, ByVal CreateZip As String)
        Using zip As ZipFile = New ZipFile()
            zip.AddDirectory(ContentFolder)
            zip.Save(CreateZip)
        End Using
    End Sub

Public Sub MyExtract(ByVal ZipToUnpack As String, ByVal UnpackDirectory As String)
        Using zip As ZipFile = ZipFile.Read(ZipToUnpack)
            Dim e As ZipEntry
            For Each e In zip
                e.Extract(UnpackDirectory, ExtractExistingFileAction.OverwriteSilently)
            Next
        End Using
    End Sub

How I call the subs:

MyExtract(AppData & "\test.zip", AppData & "\testdirectory")

MyZip(AppData & "\testdirectory", AppData & "\test.zip")

All this works fine, but the problem is that DotNetZip will not take file locations in this form. I get this weird "FileStream will not open Win32 devices such as disk partitions and tape drives. Avoid use of "\\.\" in the path." error. If I just put the zip and folder names (instead of locations + names) it works fine but only looks in it's local directory. How do I get it to function as I need it to?

[jmcilhinney]

I would guess that what's happening is that each entry in the archive has a full path attribute and by then trying to extract the entry to a specific folder you are ending up with an invalid path like "C:\SomeFolder\C:\SomeFolder\SomeFile.ext". I've never used DotNetZip so I don't know if that's the case or how you'd fix it but maybe see if there's an Extract overload that doesn't take a location and just uses the path contained in the entry or else ignores the path in the entry and uses the path you specify.

[HunterTTP]

I've googled for hours. If you guys can find a fix, I would gladly accept it. <3

[HunterTTP]

I've been to countless websites looking for this. Every example just uses "example.zip" and never tries to "save" it anywhere else. eg C:\Windows\example.zip. When I finally find some kind of solution, it is in C#. I can't believe this is this hard to find when the entire purpose of DotNetZip is to easily zip and unzip files within .Net applications. u_U

[HunterTTP]

I would guess that what's happening is that each entry in the archive has a full path attribute and by then trying to extract the entry to a specific folder you are ending up with an invalid path like "C:\SomeFolder\C:\SomeFolder\SomeFile.ext". I've never used DotNetZip so I don't know if that's the case or how you'd fix it but maybe see if there's an Extract overload that doesn't take a location and just uses the path contained in the entry or else ignores the path in the entry and uses the path you specify.

Do you think that it means the periods in a string when it says "Avoid use of "\\.\" in the path."

[dunfiddlin]

Um ... the code that you have above ...

Imports Ionic.Zip
 
Public Class Form1
    Dim Username As String = Environment.UserName
    Dim AppData As String = "C:\Users\" & Username & "\AppData\Roaming"
 
    Public Sub MyZip(ByVal ContentFolder As String, ByVal CreateZip As String)
        Using zip As ZipFile = New ZipFile()
            zip.AddDirectory(ContentFolder)
            zip.Save(CreateZip)
        End Using
    End Sub
 
    Public Sub MyExtract(ByVal ZipToUnpack As String, ByVal UnpackDirectory As String)
        Using zip As ZipFile = ZipFile.Read(ZipToUnpack)
            Dim e As ZipEntry
            For Each e In zip
                e.Extract(UnpackDirectory, ExtractExistingFileAction.OverwriteSilently)
            Next
        End Using
    End Sub
 
 
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        MyExtract(AppData & "\test.zip", AppData & "\testdirectory")
 
        MyZip(AppData & "\testdirectory", AppData & "\test.zip")
    End Sub
End Class

runs without error and with total success in both VS Express 2012 & VB.Net 2010 (once you've actually done a zip - your ordering of the calls is a little odd so I did my first run with the extract call commented out). You're not finding a fix cos there's nothing to fix, I'm afraid. Wherever the problem is coming from it's not this.

[HunterTTP]

Well that is better than nothing. I guess my MyExtract and MyZip work well. I wonder what could be the problem? I'm reinstalling VB2012 now. When I download the DotNetZip.zip I just need the Ionic.Zip.dll correct? Then I add a reference to it, and "Imports Ionic.Zip" to the very top.

[dunfiddlin]

Yup!