How to zip and unzip multiple files with a password

Environment

Product Version	2020.2.617
Product	RadZipLibrary for Document Processing

Description

The example is showing how to all files from a directory to a password-protected zip archive.

Solution

The following code snippet is traversing all the files in a directory then add the contents of each file to a new Entry in the ZipArchive. The password for the archive is passed through the DefaultEncryptionSettings class. After zipping all the files a new folder named TestZip is created and the contents of the ZipArchive are unzipped into the new folder.

DefaultEncryptionSettings protectionSettings = new DefaultEncryptionSettings() { Password = "test" }; 
 
using (FileStream output = File.OpenWrite("TestZip.zip")) 
{ 
    using (ZipArchive zipArchive = new ZipArchive(output, ZipArchiveMode.Create, true, null, null, protectionSettings)) 
    { 
        string currentDirectory = Directory.GetCurrentDirectory(); 
        string[] files = Directory.GetFiles(currentDirectory); 
        IEnumerable<string> txtFiles = files.Where(p => Path.GetExtension(p) == ".txt"); 
 
        foreach (string file in txtFiles) 
        { 
            using (FileStream stream = File.OpenRead(file)) 
            { 
                using (ZipArchiveEntry entry = zipArchive.CreateEntry(Path.GetFileName(file))) 
                { 
                    Stream entryStream = entry.Open(); 
                    stream.CopyTo(entryStream); 
                } 
            } 
        } 
    } 
} 
 
string unzipDir = "TestZip"; 
if (!Directory.Exists(unzipDir)) 
{ 
    Directory.CreateDirectory(unzipDir); 
} 
 
using (FileStream output = File.OpenRead("TestZip.zip")) 
{ 
    using (ZipArchive zipArchive = new ZipArchive(output, ZipArchiveMode.Read, true, null, null, protectionSettings)) 
    { 
        foreach (ZipArchiveEntry entry in zipArchive.Entries) 
        { 
            using (Stream entryStream = entry.Open()) 
            using (FileStream fileStream = File.OpenWrite(string.Format("{0}/{1}", unzipDir, entry.FullName))) 
            { 
                entryStream.CopyTo(fileStream); 
            } 
        } 
    } 
}