How to zip multiple files using only .net api in c#

Question

I like to zip multiple files which are being created dynamically in my web application. Those files should be zipped. For this, i dont want to use any third-party tools. jus

Answer 1

Well you can zip the files using following function you have to just pass the file bytes and this function will zip the file bytes passed as parameter and return the zipped file bytes.

 public static byte[] PackageDocsAsZip(byte[] fileBytesTobeZipped, string packageFileName)
{
    try
    {
        string parentSourceLoc2Zip = @"C:\\\\UploadedDocs"\SG-ACA OCI Packages";
        if (Directory.Exists(parentSourceLoc2Zip) == false)
        {
            Directory.CreateDirectory(parentSourceLoc2Zip);
        }

        //if destination folder already exists then delete it
        string sourceLoc2Zip = string.Format(@"{0}\{1}", parentSourceLoc2Zip, packageFileName);
        if (Directory.Exists(sourceLoc2Zip) == true)
        {
            Directory.Delete(sourceLoc2Zip, true);
        }
        Directory.CreateDirectory(sourceLoc2Zip);



             FilePath = string.Format(@"{0}\{1}",
                    sourceLoc2Zip,
                    "filename.extension");//e-g report.xlsx , report.docx according to exported file

             File.WriteAllBytes(FilePath, fileBytesTobeZipped);




        //if zip already exists then delete it
        if (File.Exists(sourceLoc2Zip + ".zip"))
        {
            File.Delete(sourceLoc2Zip + ".zip");
        }

        //now zip the source location
        ZipFile.CreateFromDirectory(sourceLoc2Zip, sourceLoc2Zip + ".zip", System.IO.Compression.CompressionLevel.Optimal, true);

        return File.ReadAllBytes(sourceLoc2Zip + ".zip");
    }
    catch
    {
        throw;
    }
}

Now if you want to export this zip bytes created for user to download you can call this function using following lines

    Response.Clear();
    Response.AddHeader("content-disposition", "attachment; filename=Report.zip");
    Response.ContentType = "application/zip";
    Response.BinaryWrite(PackageDocsAsZip(fileBytesToBeExported ,"TemporaryFolderName"));
    Response.End();