how to make a zip file

Question

I have an upload button in which, when I upload file my file, must be uploaded in zip or compress form in specified path on server

I tried ===>

        string strFileName = string.Empty;
        string strserverPath = string.Empty;
        if (UploadFiles.HasFile)
        {
            string abcPATH = tvFolders.SelectedValue.ToString();
            string rootPath = tvFolders.SelectedNode.ToString();
            string fname = Path.GetFileName(UploadFiles.PostedFile.FileName);
            try
            {
                strserverPath = abcPATH + "\\" + fname;

                //string strName = Path.GetFileName(UploadFiles.PostedFile.FileName);

                Stream myStream = UploadFiles.PostedFile.InputStream;
                byte[] myBuffer = new byte[myStream.Length + 1];
                myStream.Read(myBuffer, 0, myBuffer.Length);
                myStream.Close();
                FileStream myCompressedFile = default(FileStream);
                myCompressedFile = File.Create(Server.MapPath(Path.ChangeExtension("~/"+strserverPath, "zip")));
                GZipStream myStreamZip = new GZipStream(myCompressedFile, CompressionMode.Compress);
                myStreamZip.Write(myBuffer, 0, myBuffer.Length);
                myStreamZip.Close();
                //asp.net c#
                //UploadFiles.PostedFile.SaveAs(Server.MapPath("~/" + strserverPath));
                listofuploadedfiles.Text = "done";
            }
            catch (Exception ex)
            {
                Response.Write("Error" + ex.Message);
            }
        }
        else
            listofuploadedfiles.Text = "not done";    
    }

Answer 1

In .net 4.5 there is a new System.IO.Compression.ZipFile namespace which has a friendly api to create zip files than using the tricky to use .net 3.0 package approach.

The only caveat is that it works with folder structures rather than files directly.

As the commenter below suggests, this isn't a 'get you started' to solve you exact problem. But perhaps a new approach that could be easier from the outset.

using System;
using System.IO;
using System.IO.Compression;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            string startPath = @"c:\example\start";
            string zipPath = @"c:\example\result.zip";
            string extractPath = @"c:\example\extract";

            ZipFile.CreateFromDirectory(startPath, zipPath);

            ZipFile.ExtractToDirectory(zipPath, extractPath);
        }
    }
}

Taken from http://msdn.microsoft.com/en-us/library/vstudio/system.io.compression.zipfile

It should get you started in perhaps using the zipfile approach instead.

Answer 2

.NET below the version 4.5 does not natively support the ZIP file format.

You can look into libraries which add that support, such as SharpZipLib

Answer 3

using System;
using System.IO;
using System.IO.Packaging;

namespace ZipSample
{
class Program
{
    static void Main(string[] args)
    {
        AddFileToZip("Output.zip", @"C:\Windows\Notepad.exe");
        AddFileToZip("Output.zip", @"C:\Windows\System32\Calc.exe");
    }

    private const long BUFFER_SIZE = 4096;

    private static void AddFileToZip(string zipFilename, string fileToAdd)
    {
        using (Package zip = System.IO.Packaging.Package.Open(zipFilename, FileMode.OpenOrCreate))
        {
            string destFilename = ".\\" + Path.GetFileName(fileToAdd);
            Uri uri = PackUriHelper.CreatePartUri(new Uri(destFilename, UriKind.Relative));
            if (zip.PartExists(uri))
            {
                zip.DeletePart(uri);
            }
            PackagePart part = zip.CreatePart(uri, "",CompressionOption.Normal);
            using (FileStream fileStream = new FileStream(fileToAdd, FileMode.Open, FileAccess.Read))
            {
                using (Stream dest = part.GetStream())
                {
                    CopyStream(fileStream, dest);
                }
            }
        }
    }

    private static void CopyStream(System.IO.FileStream inputStream, System.IO.Stream outputStream)
    {
        long bufferSize = inputStream.Length < BUFFER_SIZE ? inputStream.Length : BUFFER_SIZE;
        byte[] buffer = new byte[bufferSize];
        int bytesRead = 0;
        long bytesWritten = 0;
        while ((bytesRead = inputStream.Read(buffer, 0, buffer.Length)) != 0)
        {
            outputStream.Write(buffer, 0, bytesRead);
            bytesWritten += bufferSize;
        }
    }
}
}

Coding has been Refer via these websites

1.Creating Zip archives in .NET (without an external library like SharpZipLib) 2.http://madprops.org/blog/zip-your-streams-with-system-io-packaging/
3.Create normal zip file programmatically

Additional Reference :

You can Refer to these sites.It may be useful to you.

http://forums.asp.net/t/1086292.aspx?How+to+create+zip+file+using+C+

Create normal zip file programmatically

http://www.dotnetperls.com/zipfile

http://www.aspdotnet-suresh.com/2013/04/create-zip-files-in-aspnet-c-vbnet-zip.html

http://www.codeproject.com/Questions/450505/create-zip-file-in-asp-net

Good Luck..