Question

I am trying to zip some folders. They have different paths, will not belong to the same directory.

I tested the command line arguments that I would give, and it works, but I can’t get it to work from c#:

string destination = "some path\\name.7z";
string pathToZip = "path to zip\\7z.exe";  // or 7za.exe
ProcessStartInfo p = new ProcessStartInfo();
p.FileName = pathToZip;
p.Arguments = "a \"" + destination + "\" \"";
// room for the foreach - but even one directory doesn't work right now
   p.Arguments += directoryPath + "\" \"";
p.Arguments += "\" -mx=9 -aoa";
Process x = Process.Start(p);

With 7z.exe i get a blink; With 7za.exe, I get the typical command-line zip sequence, with files zipping through, adding to archive, and an archive gets created.

Then I go to it and right-click, open or double-click… and I get that it is an invalid archive (Can not open file "name.7z" as an archive). Try command line, with 7za, to extract – same thing.

Edit: I found the solution:

My problem was the -aoa option (which I used for overwrite) – after removing it, it worked.

Answer 1

This code works for me, packs a directory with files within:

string destination = @"c:\my test.7z";
string pathToZip = @"C:\Program Files\7-Zip\7z.exe";
string directoryPath = @"c:\my test";

ProcessStartInfo p = new ProcessStartInfo();
p.FileName = pathToZip;
p.Arguments = string.Format("a -mx=9 \"{0}\" \"{1}\"", destination, directoryPath);

Process x = Process.Start(p);