C# ASP System.IO.Compression - Unauthorized access exception when using zipArchive.CreateEntryFromFile for multiple files()

Question

I have the following lines of code that work for creating a zip using ZipFile.CreateFromDirectory(selectedFile, zipPath)

        if (selectedFolder == string.Empty)
        {
            Console.WriteLine("Invalid folder, try again");
        }
        else
        {
            Console.WriteLine("\nSelect zipfile name: ");
            var zipName = Console.ReadLine();

            // Also available: extractToDirectory
            var zipPath = @"C:\Users\User\Documents\Dev\" + zipName + ".zip";
            ZipFile.CreateFromDirectory(selectedFolder, zipPath);

However, the following code which should for all intents and purposes do the same thing except for multiple files being archived into a single zip folder refuses to work:

public static void CreateZipFile(string folderToCreateZip, IEnumerable<string> files)
{   
    var zipPath = folderToCreateZip + "\\test6.zip";

    // Create a new ZIP in this location
    using (var zip = ZipFile.Open(zipPath, ZipArchiveMode.Create))
    {
        foreach (var file in files)
        {
            // Add entry for files
            zip.CreateEntryFromFile(file, zipPath, CompressionLevel.Optimal);
        }
    }
    // Dispose of zip object after files have been zipped
    //zip.Dispose();
}

var zip == ZipArchive zip

I've tried disabling read-only mode on the folders where the zip should get created, but I don't think this matters since the prior function with CreateFromDirectory() works fine. I've also tried creating a ZIP on desktop, but I get the same error.

This is the exception I'm getting:

As a note, I noticed that it does initially create the zip despite this error, just that it cannot add anything to it unlike CreateFromDirectory() can due to the folder either being in use, no permissions to that area or the folder already existing. Is there a way I can get CreateEntryFromFile() working or an alternative that would work for multiple files?

Answer 1

I had the same problem. The solution was post the full path name at the destinationArchiveFileName parameter (and also a write alowed path). For example c:\my apps folder\my app\my temp\zipfile.zip