C#中用SharpZipLib.dll實現壓縮解壓

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
using ICSharpCode.SharpZipLib.Zip;

namespace PlayEdit.ClassObj
{
    //壓縮類
    class ClassZip
    {
        /// <summary>
        /// 遞迴壓縮檔夾方法
        /// </summary>
        /// <param name="FolderToZip"></param>
        /// <param name="s"></param>
        /// <param name="ParentFolderName"></param>
        private static bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
        {
            bool res = true;
            string[] folders, filenames;
            ZipEntry entry = null;
            FileStream fs = null;
            Crc32 crc = new Crc32();
            try
            {

                //建立當前檔案夾
                entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/"));  //加上 “/” 才會當成是檔案夾建立
                s.PutNextEntry(entry);
                s.Flush();

                //先壓縮檔，再遞迴壓縮檔夾
                filenames = Directory.GetFiles(FolderToZip);
                foreach (string file in filenames)
                {
                    //開啟壓縮檔
                    fs = File.OpenRead(file);
                    byte[] buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, buffer.Length);
                    entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
                    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);
                }
            }
            catch
            {
                res = false;
            }
            finally
            {
                if (fs != null)
                {
                    fs.Close();
                    fs = null;
                }
                if (entry != null)
                {
                    entry = null;
                }
                GC.Collect();
                GC.Collect(1);
            }

            folders = Directory.GetDirectories(FolderToZip);
            foreach (string folder in folders)
            {
                if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
                {
                    return false;
                }
            }

            return res;
        }

        /// <summary>
        /// 壓縮目錄
        /// </summary>
        /// <param name="FolderToZip">待壓縮的檔案夾，全路徑格式</param>
        /// <param name="ZipedFile">壓縮後的檔案名稱，全路徑格式</param>
        /// <returns></returns>
        private static bool ZipFileDictory(string FolderToZip, string ZipedFile, int level)
        {
            bool res;
            if (!Directory.Exists(FolderToZip))
            {
                return false;
            }

            ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
            s.SetLevel(level);
            res = ZipFileDictory(FolderToZip, s, "");

            s.Finish();
            s.Close();

            return res;
        }

        /// <summary>
        /// 壓縮檔
        /// </summary>
        /// <param name="FileToZip">要進行壓縮的檔案名稱</param>
        /// <param name="ZipedFile">壓縮後產生的壓縮檔名</param>
        /// <returns></returns>
        private static bool ZipFile(string FileToZip, string ZipedFile, int level)
        {
            //如果檔案沒有找到，則報錯
            if (!File.Exists(FileToZip))
            {
                throw new System.IO.FileNotFoundException("指定要壓縮的檔案: " + FileToZip + " 不存在!");
            }
            //FileStream fs = null;
            FileStream ZipFile = null;
            ZipOutputStream ZipStream = null;
            ZipEntry ZipEntry = null;
            bool res = true;
            try
            {
                ZipFile = File.OpenRead(FileToZip);
                byte[] buffer = new byte[ZipFile.Length];
                ZipFile.Read(buffer, 0, buffer.Length);
                ZipFile.Close();

                ZipFile = File.Create(ZipedFile);
                ZipStream = new ZipOutputStream(ZipFile);
                ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
                ZipStream.PutNextEntry(ZipEntry);
                ZipStream.SetLevel(level);

                ZipStream.Write(buffer, 0, buffer.Length);
            }
            catch
            {
                res = false;
            }
            finally
            {
                if (ZipEntry != null)
                {
                    ZipEntry = null;
                }
                if (ZipStream != null)
                {
                    ZipStream.Finish();
                    ZipStream.Close();
                }
                if (ZipFile != null)
                {
                    ZipFile.Close();
                    ZipFile = null;
                }
                GC.Collect();
                GC.Collect(1);
            }

            return res;
        }
        /// <summary>
        /// 壓縮檔 和 檔案夾
        /// </summary>
        /// <param name="FileToZip">待壓縮的檔案或檔案夾，全路徑格式</param>
        /// <param name="ZipedFile">壓縮後產生的壓縮檔名，全路徑格式</param>
        /// <returns></returns>
        public static bool Zip(String FileToZip, String ZipedFile, int level)
        {
            if (Directory.Exists(FileToZip))
            {
                return ZipFileDictory(FileToZip, ZipedFile, level);
            }
            else if (File.Exists(FileToZip))
            {
                return ZipFile(FileToZip, ZipedFile, level);
            }
            else
            {
                return false;
            }
        }
    }
    /// <summary>
    ///  解壓類
    /// </summary>
    public class UnZipClass
    {
        /// <summary>
        /// 解壓功能(解壓壓縮檔到指定目錄)
        /// </summary>
        /// <param name="FileToUpZip">待解壓的檔案</param>
        /// <param name="ZipedFolder">指定解壓目標目錄</param>
        public static void UnZip(string FileToUpZip, string ZipedFolder)
        {
            if (!File.Exists(FileToUpZip))
            {
                return;
            }

            if (!Directory.Exists(ZipedFolder))
            {
                Directory.CreateDirectory(ZipedFolder);
            }

            ZipInputStream s = null;
            ZipEntry theEntry = null;

            string fileName;
            FileStream streamWriter = null;
            try
            {
                s = new ZipInputStream(File.OpenRead(FileToUpZip));
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    if (theEntry.Name != String.Empty)
                    {
                        fileName = Path.Combine(ZipedFolder, theEntry.Name);
                        ///判斷檔案路徑是否是檔案夾
                        if (fileName.EndsWith("/") || fileName.EndsWith("\\"))
                        {
                            Directory.CreateDirectory(fileName);
                            continue;
                        }

                        streamWriter = File.Create(fileName);
                        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;
                            }
                        }
                    }
                }
            }
            finally
            {
                if (streamWriter != null)
                {
                    streamWriter.Close();
                    streamWriter = null;
                }
                if (theEntry != null)
                {
                    theEntry = null;
                }
                if (s != null)
                {
                    s.Close();
                    s = null;
                }
                GC.Collect();
                GC.Collect(1);
            }
        }
    }
}

 

 

本文來自CSDN部落格，轉載請標明出處：http://blog.csdn.net/tcstar/archive/2007/11/08/1872832.aspx