"C #" zip compression and decompression

//Compression ClassclassZipclass { Public voidZipFile (stringFiletozip,stringZipedfile,intCompressionLevel,intBlockSize) {            if(!System.IO.File.Exists (Filetozip)) {                Throw NewSystem.IO.FileNotFoundException ("The specified file"+ Filetozip +"could not being found. Zipping Aborderd"); } System.IO.FileStream Streamtozip=NewSystem.IO.FileStream (Filetozip, System.IO.FileMode.Open, System.IO.FileAccess.Read); System.IO.FileStream ZipFile=System.IO.File.Create (Zipedfile); Zipoutputstream ZipStream=NewZipoutputstream (ZipFile); ZipEntry ZipEntry=NewZipEntry ("Zippedfile");            Zipstream.putnextentry (ZipEntry);            Zipstream.setlevel (CompressionLevel); byte[] buffer =New byte[BlockSize]; System.Int32 size= Streamtozip.read (buffer,0, buffer.            Length); Zipstream.write (Buffer,0, size); Try            {                 while(Size <streamtozip.length) {intSizeread = streamtozip.read (buffer,0, buffer.                    Length); Zipstream.write (Buffer,0, Sizeread); Size+=Sizeread; }            }            Catch(System.Exception ex) {Throwex;            } zipstream.finish ();            Zipstream.close ();        Streamtozip.close (); }         Public voidZipfilemain (string[] args,stringpassword) {            string[] filenames = Directory.GetFiles (args[0]); Zipoutputstream s=NewZipoutputstream (File.create (args[1])); S.setlevel (6);//0-store-9-means best CompressionS.password=md5.encrypt (password); foreach(stringFileinchfilenames) {                //Open Compressed FileFileStream fs =File.openread (File); byte[] buffer =New byte[FS.                Length]; Fs. Read (Buffer,0, buffer.                Length); Array arr= file. Split ('\\'); stringLe = arr. GetValue (arr. Length-1).                ToString (); ZipEntry entry=NewZipEntry (LE); Entry. DateTime=DateTime.Now; Entry. Size=FS.                Length; Fs.                Close ();                S.putnextentry (entry); S.write (Buffer,0, buffer.            Length);            } s.finish ();        S.close (); }    }

//Decompression ClassclassUnzipclass { Public voidUnZip (string[] args,stringpassword) {            stringDirectoryName = Path.getdirectoryname (args[1]); using(FileStream filestreamin =NewFileStream (args[0], FileMode.Open, FileAccess.Read) {using(Zipinputstream Zipinstream =NewZipinputstream (filestreamin)) {Zipinstream.password=md5.encrypt (password); ZipEntry entry=Zipinstream.getnextentry ();  Do                    {                        using(FileStream filestreamout =NewFileStream (DirectoryName +@"\"+entry. Name, FileMode.Create, FileAccess.Write)) {intSize =2048; byte[] buffer =New byte[2048];  Do{size= Zipinstream.read (buffer,0, buffer.                                Length); Filestreamout.write (Buffer,0, size); }  while(Size >0); }                    }  while((Entry = Zipinstream.getnextentry ())! =NULL); }            }        }    }

//MD5 Encryption Class classMD5 {/// <summary>        ///32-bit MD5 encryption/// </summary>        /// <param name= "str" >Encrypted characters</param>        /// <returns></returns>         Public Static stringEncryptstringstr) {            stringCL =str; stringPWD =""; MD5 MD5=MD5.            Create (); byte[] s =Md5.computehash (Encoding.UTF8.GetBytes (CL));  for(inti =0; i < s.length; i++) {pwd= pwd + s[i]. ToString ("X"); }            returnpwd; }    }

ICSharpCode.SharpZipLib.dll Download

"C #" zip compression and decompression