CODEWITHSUNDEEP
c#.netvb.netunzip
plasmasnakeneo
plasmasnakeneo

Reputation: 2221

Unzipping zipped folders, ASP.NET MVC 5

Does anyone know how to unzip a folder that has been zipped so that just the files within the folder are returned instead of the folder itself.

Currently I am using this:

ZipFile.ExtractToDirectory(<Zipped File Source>, <Unzipped File Destination>)

This works fine for files that have been zipped into one zip file, but for files within a folder that has been zipped, I just want the files.

Upvotes: 0

Views: 3591

Answers (2)

plasmasnakeneo
plasmasnakeneo

Reputation: 2221

Thanks to Stewart_R, for pointing me in the right direction on this one.

Just to reiterate, the "First Method" below works but not in the way I needed it to.

First Method (VB):

ZipFile.ExtractToDirectory(<Zipped File Source>, <Unzipped File Destination>)

As I previously mentioned in my question, using the above code unzips files that have been zipped together or a folder that contains files, but doing the latter will result in the folder-name with the files inside. In order to get just the files try this Second Method (VB):

Using archive As ZipArchive = ZipFile.OpenRead(<zip_file_path>)  // "<zip_file_path>" is the location of your zip file
    For Each entry As ZipArchiveEntry In archive.Entries 
        If entry.Name.EndsWith(".txt", StringComparison.OrdinalIgnoreCase) Then   //  ".txt" is the extention that you're looking for
           entry.ExtractToFile(Path.Combine(<unzip_to_path>, entry.Name))             //  "<unzip_to_path>" is the destination folder
        End If
    Next
End Using

Note:

"entry.Name" returns the actual filename with its extention i.e.;

"somefile.txt"

This is important due to the fact that unzipping using the "first method" returns; 

"folder_name/somefile.txt"

This behavior can be duplicated using the "second method" if you replace;

"entry.Name"

with;

"entry.FullName"

Final Note:

If you have more than one extension that you are trying to match you may add an "or" (VB), or a || (C#) within the conditional:

VB:
   entry.Name.EndsWith(".txt", StringComparison.OrdinalIgnoreCase) or
   entry.Name.EndsWith(".jpg", StringComparison.OrdinalIgnoreCase) Then

C#:
   entry.Name.EndsWith(".txt", StringComparison.OrdinalIgnoreCase) ||
   entry.Name.EndsWith(".jpg", StringComparison.OrdinalIgnoreCase) Then

Upvotes: 1

Stewart_R
Stewart_R

Reputation: 14485

The same code unzips all files.

From here:

http://msdn.microsoft.com/en-us/library/hh485723%28v=vs.110%29.aspx

we have:

Extracts all the files in the specified zip archive to a directory on the file system.

Upvotes: 1

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