How to: Password Protect Archive Files

• Apr 05, 2019

To encrypt and password protect files in an archive, do the following:

1. Create a ZipArchive class instance.
2. Call its ZipArchive.AddFile method for each selected file. The method returns an object of the ZipFileItem type.
3. Specify the ZipArchive.Password and ZipItem.EncryptionType properties for each item.
4. Call the ZipArchive.Save method to create an archive and save it to a specified location.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/compression-library-examples-e4695

ZipExamples.cs

using DevExpress.Compression;
        public void ProtectPassword() {
            string[] sourcefiles = this.sourceFiles;
            string password = "123";
            using (ZipArchive archive = new ZipArchive()) {
                foreach (string file in sourceFiles) {
                    ZipFileItem zipFI = archive.AddFile(file, "/");
                    zipFI.EncryptionType = EncryptionType.Aes128;
                    zipFI.Password = password;
                }
                archive.Save("Documents\\ProtectPassword.zip");
            }
        }

ZipExamples.vb

Imports DevExpress.Compression
        Public Sub ProtectPassword()
            Dim sourcefiles() As String = Me.sourceFiles
            Dim password As String = "123"
            Using archive As New ZipArchive()
                For Each file As String In Me.sourceFiles
                    Dim zipFI As ZipFileItem = archive.AddFile(file, "/")
                    zipFI.EncryptionType = EncryptionType.Aes128
                    zipFI.Password = password
                Next file
                archive.Save("Documents\ProtectPassword.zip")
            End Using
        End Sub