How to zip with password protected the multiple zipped file from a folder?

Question

i'm working on the program to zip the zipped files in a folder with a password protected. For example i have multiple zipped file in a folder D:\Work\ZippedFile which is ABC.zip, CDE.zip, TZE.zip. I want to zip all the zipped file into one zip file named AllFile.zip with a password protected. What have i tried so far is as below:

string[] dirs = Directory.GetDirectories(@"D:\Work\ZippedFile");
foreach (string dir in dirs)
if (file.Contains(".zip"))
{
    using (var zip = new ZipFile())
    {
        string filename = file.Substring(51);
        zip.Password = "Abc!23";
        zip.Encryption = EncryptionAlgorithm.WinZipAes256;
        zip.AddFile(file, "");
        zip.Save(dir + "\\" + "AllFile.zip");
    }
}

I know this will output a single zip file for each zipped file, I hope somebody can give me an idea on how to achieve the right output. Thanks in advance.

isn't it obvious? move saving and creating new instance of ZipFile outside the loop (only AddFile should be in loop) — Selvin, Dec 13 '19 at 10:09
Does this answer your question? [How to zip multiple files using only .net api in c#](https://stackoverflow.com/questions/1243929/how-to-zip-multiple-files-using-only-net-api-in-c-sharp) — Sinatr, Dec 13 '19 at 10:25

score 0 · Answer 1 · answered Dec 14 '19 at 16:45

Don't create a new zip file for each existing zip file. Create a single new zip file and add all the existing zip files to it.

using (var zip = new ZipFile())
{
    string[] dirs = Directory.GetDirectories(@"D:\Work\ZippedFile");

    foreach (string dir in dirs)
    {
        if (file.Contains(".zip"))
        {   
            string filename = file.Substring(51);
            zip.AddFile(file, "");
        }
    }

    zip.Password = "Abc!23";
    zip.Encryption = EncryptionAlgorithm.WinZipAes256;
    zip.Save(dir + "\\" + "AllFile.zip");
}

How to zip with password protected the multiple zipped file from a folder?

1 Answers1