压缩解压

public class ZipHerlper
    {
        #region 压缩zip
        public static bool CreateZipDirectory(string dirPath, string zipFilePath)
        {
            bool success = false;
            FileInfo zipFile = new FileInfo(zipFilePath);
            if (zipFile.Exists)
            {
                zipFile.Delete();
            }

            ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipFilePath));
            try
            {
                if (dirPath[dirPath.Length - 1] != System.IO.Path.DirectorySeparatorChar)
                    dirPath += System.IO.Path.DirectorySeparatorChar;
                zipStream.SetLevel(9);// 压缩级别 0-9
                byte[] buffer = new byte[4096]; //缓冲区大小
                CreateZipFiles(dirPath, zipStream, dirPath, buffer);
                success = true;
            }
            catch (Exception ex)
            {
                success = false;
            }
            finally
            {
                zipStream.Finish();
                zipStream.Close();
                zipFile = new FileInfo(zipFilePath);
                if (!success && zipFile.Exists)
                {
                    zipFile.Delete();
                }
            }
            return success;
        }

        public static void CreateZipFiles(string sourceFilePath, ZipOutputStream zipStream, string staticFile, byte[] buffer)
        {
            string[] filesArray = Directory.GetFileSystemEntries(sourceFilePath);
            foreach (string file in filesArray)
            {
                if (!file.EndsWith(".pdb") && !file.Contains(".vshost.exe"))
                {
                    if (Directory.Exists(file))
                    {
                        CreateZipFiles(file, zipStream, staticFile, buffer);
                    }
                    else
                    {
                        ZipEntry entry = new ZipEntry(file.Substring(staticFile.LastIndexOf("\\") + 1));
                        entry.DateTime = DateTime.Now;
                        zipStream.PutNextEntry(entry);
                        using (FileStream fs = File.OpenRead(file))
                        {
                            int sourceBytes;
                            do
                            {
                                sourceBytes = fs.Read(buffer, 0, buffer.Length);
                                zipStream.Write(buffer, 0, sourceBytes);
                            } while (sourceBytes > 0);
                        }
                    }
                }
            }
        }
        #endregion

        /// <summary>
        /// 解压
        /// </summary>
        /// <param name="zip"></param>
        /// <param name="path"></param>
        public static void UnZip(string zip, string path)
        {
            ZipInputStream s = new ZipInputStream(File.OpenRead(zip));
            ZipEntry theEntry;
            while ((theEntry = s.GetNextEntry()) != null)
            {

                string directoryName = Path.GetDirectoryName(path);
                string fileName = Path.GetFileName(theEntry.Name);
                //生成解压目录

                if (!Directory.Exists(directoryName))
                {
                    Directory.CreateDirectory(directoryName);
                }
                if (theEntry.Name.Contains("\\") || theEntry.Name.Contains("/"))
                {
                    string subPath = Path.GetDirectoryName(path + theEntry.Name);
                    if (!Directory.Exists(subPath))
                    {
                        Directory.CreateDirectory(subPath);
                    }
                }
                if (fileName != String.Empty)
                {
                    //解压文件到指定的目录
                    FileStream streamWriter = File.Create(path + theEntry.Name);

                    int size = 2048;
                    byte[] data = new byte[2048];
                    while (true)
                    {
                        size = s.Read(data, 0, data.Length);
                        if (size > 0)
                        {
                            streamWriter.Write(data, 0, size);
                        }
                        else
                        {
                            break;
                        }
                    }

                    streamWriter.Close();
                }
            }
            s.Close();
        }
    }

        private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dialog = new FolderBrowserDialog();
            dialog.Description = "请选择文件路径";
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                string foldPath = dialog.SelectedPath;
                ZipHerlper.CreateZipDirectory(foldPath, foldPath+".Zip");
                MessageBox.Show("压缩完成");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            OpenFileDialog fileDialog = new OpenFileDialog();
            fileDialog.Multiselect = true;
            fileDialog.Title = "请选择文件";
            fileDialog.Filter = "所有文件(*.*)|*.*";
            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                string file = fileDialog.FileName;
                string ss = file.Substring(0, file.LastIndexOf('.'));
                ZipHerlper.UnZip(file, file.Substring(0,file.LastIndexOf('.'))+"\\");
                MessageBox.Show("解压完成");
            }
        }

ICSharpCode.SharpZipLib.dll需要引用