Compose Multi-volume 7z Archive
Overview
Aspose.ZIP for .NET allows you to create 7z archives split into multiple files (volumes). This is achieved using the SaveSplit methdod, which divides a large archive into several parts for easier storage and transfer.
Options for split archive
To configure how a 7z archive is split, use the SplitSevenZipArchiveSaveOptions constructor, which requires two parameters:
- The base file name for each part
- The size of each volume in bytes.
The output files will have sequential extensions: .7z.001, .7z.002, .7z.003, and so on. The last part is typically smaller than the specified size if the total data does not divide evenly.
Compose multi-volume archive
The following example demonstrates how to create a split 7z archive with each part sized at 65,536 bytes (except, possibly, the last volume). The part files will be named part.7z.001, part.7z.002, part.7z.003, etc.
1 FileInfo fi1 = new FileInfo("alice29.txt");
2 FileInfo fi2 = new FileInfo("picture.png");
3
4 using (SevenZipArchive archive = new SevenZipArchive(new SevenZipEntrySettings(new SevenZipPPMdCompressionSettings())))
5 {
6 archive.CreateEntry("alice29.txt", fi1);
7 archive.CreateEntry("picture.png", fi2);
8 archive.SaveSplit(@"C:\Folder", new SplitSevenZipArchiveSaveOptions("part", 65536));
9 }Multi-volume 7z archives support all 7z features, including encryption and any supported compression method, just like regular 7z archives.