compress a folder into multiple zip files

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Dear All,
i am looking for some example which can help me to understand how can i zip files in C# in parts i.e. if i have Folder Size = 20MB , I want to Compress It As split the archive in 4 parts of 5MB each. when i have those 4 files, I can extract them to the original files. So each individual part may not be a proper zip but all 4 parts should extract properly

Could someone suggest? thanks,

C#

using (var memoryStream = new MemoryStream())
{
 using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
 {
  var demoFile = archive.CreateEntry("foo.txt");

 }

 using (var fileStream = new FileStream(@"C:\Temp\test.zip", FileMode.Create))
   {
     memoryStream.Position=0;
     memoryStream.WriteTo(fileStream);
   }
 }

Iam Using System.IO.Compression and some time Foo.txt Is More than 3 Giga so i need to split this file to multiple compressed file

Thanks

Posted 8-Sep-15 1:03am

Member 11593359

Updated 8-Sep-15 1:56am

v3

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Maciej Los 8-Sep-15 7:45am

What have you tried till now? Where are you stuck? What kind of library do you use to zip folders/files?

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Maciej Los · Accepted Answer · 2015-09-08T01:53:00

Solution 1

Have a look here: System.IO.Packaging Namespace[^], which provides classes that support storage of multiple data objects in a single container.
Usage: Introducing System.IO.Packaging[^]

Another option:
DotNetZip is a FAST, FREE class library and toolset for manipulating zip files[^]
Usage: Create ZIP Files From An ASP.NET Application[^]

Posted 8-Sep-15 1:53am

Maciej Los

Comments

Sergey Alexandrovich Kryukov 8-Sep-15 9:20am

5ed, but...

I'm not sure that breaking the compressed file into separate pieces of fixed size is available on those APIs; it should be checked up. Do you know if this feature is there? Development of such code in the user's side is somewhat problematic.

—SA

Member 11593359 8-Sep-15 9:55am

Thank you for your reply
There is already library Do The require Ionic.Zip
using (ZipFile zip = new ZipFile())
{
zip.AddDirectory(sFolderPath);
zip.Comment = "This zip was created at " + System.DateTime.Now.ToString("G");
zip.MaxOutputSegmentSize = 10000 * 1024; // 100k segments
zip.Save(sbZipFolderName.ToString());
SegmentsCreated = zip.NumberOfSegmentsForMostRecentSave;
}
but i need to remove this library from my project and Use System.IO.Compression
Thanks

Maciej Los 8-Sep-15 10:15am

You're very welcome ;)

Maciej Los 8-Sep-15 10:15am

Thank you, Sergey.

Wendelius 8-Sep-15 12:12pm

That would do it.

Maciej Los 8-Sep-15 12:13pm

Thank you, Mika.