using System.IO;

using System.Windows.Forms;

using ICSharpCode.SharpZipLib.Zip;

using ICSharpCode.SharpZipLib.Checksums;

   public void unZip(string strSouceFile, string strDestFile)

        {

            if (!Directory.Exists(strDestFile))

                Directory.CreateDirectory(strDestFile);

            using (ZipInputStream zip = new ZipInputStream(File.OpenRead(strSouceFile)))

            {

                ZipEntry theEntry;

                string fileName;

                FileStream streamWriter;

                while ((theEntry = zip.GetNextEntry()) != null)

                {

                    fileName = Path.GetFileName(theEntry.Name);

                    if (fileName != String.Empty)

                    {

                        streamWriter = new FileStream(strDestFile + fileName, FileMode.Create, FileAccess.Write, FileShare.Read | FileShare.Write);

                        int size = 2048;

                        byte[] data = new byte[2048];

                        while (true)

                        {

                            size = zip.Read(data, 0, data.Length);

                            if (size > 0)

                            {

                                streamWriter.Write(data, 0, size);

                            }

                            else

                            {

                                break;

                            }

                        }

                        streamWriter.Close();

                    }

                }

                MessageBox.Show("解压文件成功！

","提示",MessageBoxButtons.OK,MessageBoxIcon.Information);

            }

        }

        public void ZipFile(string strSouceFile, string strDestFile)

        {

            using (ZipOutputStream stream = new ZipOutputStream(File.Create(strDestFile)))

            {

                stream.SetLevel(5);

                byte[] buffer = new byte[0x1000];

                ZipEntry entry = new ZipEntry(Path.GetFileName(strSouceFile));

                entry.DateTime = DateTime.Now;

                stream.PutNextEntry(entry);

                using (FileStream stream2 = File.OpenRead(strSouceFile))

                {

                    int num;

                    do

                    {

                        num = stream2.Read(buffer, 0, buffer.Length);

                        stream.Write(buffer, 0, num);

                    }

                    while (num > 0);

                    MessageBox.Show("压缩文件成功！

");

                }

                stream.Finish();

                stream.Close();

            }

        }

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