C# 전체 폴더 압축 및 해제

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P rogramming/C # (13.05~)

C# 전체 폴더 압축 및 해제

Only I Can 2014. 12. 17. 16:51

전체 폴더 압축 및 해제

라이브러리는 ICSharpCode.dll 사용
( Download 주소 http://www.icsharpcode.net/: 해당 ICSharpCode 는 GPL을 따름 )

압축소스는 아래와 같다.

private void button1_Click (object sender, EventArgs e)
        {
            CreateSample( @"C:\VSM\Admin\압축결과.zip", @"C:\VSM\Admin\압축할폴더" );
        }

public void CreateSample ( string outPathname, string folderName )
        {

FileStream fsOut = File.Create ( outPathname );
            ZipOutputStream zipStream = new ZipOutputStream ( fsOut );

zipStream.SetLevel ( 0 ); //0-9, 9 being the highest level of compression

int folderOffset = folderName.Length + ( folderName.EndsWith ( "\\" ) ? 0 : 1 );

// :재귀로 돌림
            CompressFolder ( folderName, zipStream, folderOffset );

zipStream.IsStreamOwner = true; // Makes the Close also Close the underlying stream
            zipStream.Close ( );
        }

// :재귀로 돌림
        private void CompressFolder ( string path, ZipOutputStream zipStream, int folderOffset )
        {
            string[] files = Directory.GetFiles ( path );

foreach ( string filename in files )
            {
                FileInfo fi = new FileInfo ( filename );

string entryName = filename.Substring ( folderOffset ); // Makes the name in zip based on the folder
                entryName = ZipEntry.CleanName ( entryName ); // Removes drive from name and fixes slash direction
                ZipEntry newEntry = new ZipEntry ( entryName );
                newEntry.DateTime = fi.LastWriteTime; // Note the zip format stores 2 second granularity

newEntry.Size = fi.Length;
                zipStream.PutNextEntry ( newEntry );

byte[ ] buffer = new byte [ 4096 ];
                using ( FileStream streamReader = File.OpenRead ( filename ) )
                {
                    StreamUtils.Copy ( streamReader, zipStream, buffer );
                }
                zipStream.CloseEntry ( );
            }
            string[ ] folders = Directory.GetDirectories ( path );
            foreach ( string folder in folders )
            {
                CompressFolder ( folder, zipStream, folderOffset );
            }
        }

재귀를 이용했으며, 단계적인 Compress가 가능하다. 숫자가 올라갈수록 압축률이 높아진다( = 파일 용량이 적어진다 )

해제 소스는 다음과 같다.

// 해제
        private void button2_Click ( object sender, EventArgs e )
        {
            ExtractZipFile( @"C:\VSM\Admin\해제할파일.zip", "", @"C:\VSM\Admin\해제할곳");
        }

public void ExtractZipFile ( string archiveFilenameIn, string password, string outFolder )
        {
            ZipFile zf = null;
            try
            {
                FileStream fs = File.OpenRead ( archiveFilenameIn );
                zf = new ZipFile ( fs );
                if ( !String.IsNullOrEmpty ( password ) )
                {
                    zf.Password = password;     // AES encrypted entries are handled automatically
                }
                foreach ( ZipEntry zipEntry in zf )
                {
                    if ( !zipEntry.IsFile )
                    {
                        continue;           // Ignore directories
                    }
                    String entryFileName = zipEntry.Name;
                    // to remove the folder from the entry:- entryFileName = Path.GetFileName(entryFileName);
                    // Optionally match entrynames against a selection list here to skip as desired.
                    // The unpacked length is available in the zipEntry.Size property.

byte[] buffer = new byte [ 4096 ];     // 4K is optimum
                    Stream zipStream = zf.GetInputStream ( zipEntry );

// Manipulate the output filename here as desired.
                    String fullZipToPath = Path.Combine ( outFolder, entryFileName );
                    string directoryName = Path.GetDirectoryName ( fullZipToPath );
                    if ( directoryName.Length > 0 )
                        Directory.CreateDirectory ( directoryName );

// Unzip file in buffered chunks. This is just as fast as unpacking to a buffer the full size
                    // of the file, but does not waste memory.
                    // The "using" will close the stream even if an exception occurs.
                    using ( FileStream streamWriter = File.Create ( fullZipToPath ) )
                    {
                        StreamUtils.Copy ( zipStream, streamWriter, buffer );
                    }
                }
            }
            finally
            {
                if ( zf != null )
                {
                    zf.IsStreamOwner = true; // Makes close also shut the underlying stream
                    zf.Close ( ); // Ensure we release resources
                }
            }
        }

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