Use the ZipFile class to compress a directory and expand the compressed file.
ZipFile can compress an entire directory. It then can expand the compressed file into a new directory. We use the CreateFromDirectory and ExtractToDirectory methods. ZipFile is simpler than developing custom methods.File
Example. To use this program, please create a folder called "source" in the same directory as the program executable. You can add files to it. Also make sure that a "destination" folder does not yet exist.
Program: Upon execution, the program will take all the files in the source directory and add them to an archive called "destination.zip".
Then: It will expand "destination.zip" into a folder called "destination". We specify CompressionLevel.Optimal.
VB.NET program that uses ZipFile
' Create ZIP from "source" directory (in program folder).
' Extract ZIP to "destination" folder.
Notes, add reference. You may need to add a reference in Visual Studio before you begin. Go to Add Reference and select System.IO.Compression.FileSystem. ZipFile was not in the older versions of the .NET Framework.
Summary. We used the ZipFile type in the VB.NET language. We compressed all the files in one directory into a single ZIP file. We then expanded that file into the original form. The Optimal compression level helped reduce the size of the archive.