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ÐèÒªÓõ½µÚÈý·½¿Ø¼þICSharpCode.SharpZipLib.dll
using System.IO;
using System.IO.Compression;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.GZip;
using ICSharpCode.SharpZipLib.Checksums;  
  #region ѹËõÎļþ¼Ð,Ö§³ÖµÝ¹é
/// <summary>
        ///¡¡Ñ¹ËõÎļþ¼Ð
        /// </summary>
        /// <param name="dir">´ýѹËõµÄÎļþ¼Ð</param>
        /// <param name="targetFileName">ѹËõºóÎļþ·¾¶£¨°üÀ¨ÎļþÃû£©</param>
        /// <param name="recursive">ÊÇ·ñµÝ¹éѹËõ</param>
        /// <returns></returns>
        public bool Compress(string dir, string targetFileName, bool recursive)
        {
            //Èç¹ûÒѾ­´æÔÚÄ¿±êÎļþ£¬Ñ¯ÎÊÓû§ÊÇ·ñ¸²¸Ç
            if (File.Exists(targetFileName))
            {
               // if (!_ProcessOverwrite(targetFileName))
                    return false;
            }
            string[] ars = new string[2];
            if (recursive == false)
            {
                //return Compress(dir, targetFileName);
   &nb