public void ZipFile(string strFile, string strZip)

    {

        if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)

            strFile += Path.DirectorySeparatorChar;

        ZipOutputStream s = new ZipOutputStream(File.Create(strZip));

        s.SetLevel(6); // 0 - store only to 9 - means best compression

        zip(strFile, s, strFile);

        s.Finish();

        s.Close();

    }

      private void zip(string strFile, ZipOutputStream s, string staticFile)
      {

          if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar) strFile += Path.DirectorySeparatorChar;

          Crc32 crc = new Crc32();

          string[] filenames = Directory.GetFileSystemEntries(strFile);

          foreach (string file in filenames)
          {

              if (Directory.Exists(file))
              {

                  zip(file, s, staticFile);

              }

              else // 否则直接压缩文件
              {

                  //打开压缩文件

                  FileStream fs = File.OpenRead(file);

                  byte[] buffer = new byte[fs.Length];

                  fs.Read(buffer, 0, buffer.Length);

                  string tempfile = file.Substring(staticFile.LastIndexOf("\\") + 1);

                  ZipEntry entry = new ZipEntry(tempfile);

                  entry.DateTime = DateTime.Now;

                  entry.Size = fs.Length;

                  fs.Close();

                  crc.Reset();

                  crc.Update(buffer);

                  entry.Crc = crc.Value;

                  s.PutNextEntry(entry);

                  s.Write(buffer, 0, buffer.Length);

              }

          }
      }




        private void button1_Click(object sender, EventArgs e)
        {
         string[] FileProperties = new string[2];

        FileProperties[0] = "F:\\a\\";//待压缩文件目录

        FileProperties[1] = "f:\\a.zip";  //压缩后的目标文件

        ZipFile(FileProperties[0], FileProperties[1]);

        }