c# move files to zip folder?

Question

What I want to do is create a zip folder by right-clicking in windows explorer, and new -> Compressed (zip) folder.

Then I want to use something like My.Computer.Filesystem.MoveFile("C:\From.jpg", "C:\ZipFolder.zip\To.jpg", true)

But I get an error "file or directory with the same name already exists".

Is there an easy way to do this? I thought windows supported zip folders but it seems to have no idea that I'm trying to move the file to a zip folder, rather, it is seeing the zip as a file and thinks I'm overwriting it or something.

Answer 1

In DotNetZip, adding files to an existing zip is really simple and reliable.

DotNetZip is a FAST, FREE class library and toolset for manipulating zip files. Use VB, C# or any .NET language to easily create, extract, or update zip files.

DotNetZip is the best open-source ZIP library for .NET.

using (var zip = ZipFile.Read(nameOfExistingZip))
{
    zip.CompressionLevel = Ionic.Zlib.CompressionLevel.BestCompression;
    zip.AddFile(additionalFileToAdd);
    zip.Save();
}

If you want to specify a directory path for that new file, then use a different overload for AddFile().

using (var zip = ZipFile.Read(nameOfExistingZip))
{
    zip.CompressionLevel = Ionic.Zlib.CompressionLevel.BestCompression;
    zip.AddFile(additionalFileToAdd, "directory\\For\\The\\Added\\File");
    zip.Save();
}

If you want to add a set of files, use AddFiles().

using (var zip = ZipFile.Read(nameOfExistingZip))
{
    zip.CompressionLevel = Ionic.Zlib.CompressionLevel.BestCompression;
    zip.AddFiles(listOfFilesToAdd, "directory\\For\\The\\Added\\Files");
    zip.Save();
}