C#中文件压缩操作的一个类

 

在做项目的时候经常会用到文件的要所或者是解压缩，这里提供一个文件的压缩操作的类

 public class ZIPPER : IDisposable
    {
        private string m_FolderToZIP;
        private ArrayList m_FileNamesToZIP;
        private string m_FileNameZipped;
        
        private ZipOutputStream m_ZipStream = null;
        private Crc32 m_Crc;

        Begin for Public Properties#region Begin for Public Properties
        /**//**//**//// <summary>
        /// 保存压缩文件的路径
        /// </summary>
        public  string FolderToZIP
        {
            get { return m_FolderToZIP; }
            set { m_FolderToZIP = value; }
        }

        /**//**//**//// <summary>
        /// 要压缩的文件或文件夹
        /// </summary>
        public  ArrayList FileNamesToZIP
        {
            get { return m_FileNamesToZIP; }
            set { m_FileNamesToZIP = value; }
        }

        /**//**//**//// <summary>
        /// 压缩后的文件路径  
        /// </summary>
        public  string FileNameZipped
        {
            get { return m_FileNameZipped; }
            set { m_FileNameZipped = value; }
        }
        #endregion

        /**//**//**//// <summary>
        /// The construct
        /// </summary>
        public ZIPPER()
        {
            this.m_FolderToZIP = "";
            this.m_FileNamesToZIP = new ArrayList();
            this.m_FileNameZipped = "";
        }

        ZipFolder#region ZipFolder
        /**//**//**//// <summary>
        /// Zip one folder : single level
        /// Before doing this event, you must set the Folder and the ZIP file name you want
        /// </summary>
        public void ZipFolder()
        {
            if (this.m_FolderToZIP.Trim().Length == 0)
            {
                throw new Exception("You must setup the folder name you want to zip!");
            }

            if(Directory.Exists(this.m_FolderToZIP) == false)
            {
                throw new Exception("The folder you input does not exist! Please check it!");
            }
            
            if (this.m_FileNameZipped.Trim().Length == 0)
            {
                throw new Exception("You must setup the zipped file name!");
            }
            
            string[] fileNames = Directory.GetFiles(this.m_FolderToZIP.Trim());

            if (fileNames.Length == 0)
            {
                throw new Exception("Can not find any file in this folder(" + this.m_FolderToZIP + ")!");
            }

            // Create the Zip File
            this.CreateZipFile(this.m_FileNameZipped);

            // Zip all files
            foreach(string file in fileNames)
            {
                this.ZipSingleFile(file);
            }

            // Close the Zip File
            this.CloseZipFile();
        }
        #endregion

        ZipFiles#region ZipFiles
        /**//**//**//// <summary>
        /// Zip files
        /// Before doing this event, you must set the Files name and the ZIP file name you want
        /// </summary>
        public void ZipFiles()
        {
            if (this.m_FileNamesToZIP.Count == 0)
            {
                throw new Exception("You must setup the files name you want to zip!");
            }

            foreach(object file in this.m_FileNamesToZIP)
            {
                if(File.Exists(((string)file).Trim()) == false)
                {
                    throw new Exception("The file(" + (string)file + ") you input does not exist! Please check it!");
                }
            }

            if (this.m_FileNameZipped.Trim().Length == 0)
            {
                throw new Exception("You must input the zipped file name!");
            }

            // Create the Zip File
            this.CreateZipFile(this.m_FileNameZipped);

            // Zip this File
            foreach(object file in this.m_FileNamesToZIP)
            {
                this.ZipSingleFile((string)file);
            }

            // Close the Zip File
            this.CloseZipFile();
        }
        #endregion

        CreateZipFile#region CreateZipFile
        /**//**//**//// <summary>
        /// Create Zip File by FileNameZipped
        /// </summary>
        /// <param name="fileNameZipped">zipped file name like "C:TestMyZipFile.ZIP"</param>
        private void CreateZipFile(string fileNameZipped)
        {
            this.m_Crc = new Crc32();
            this.m_ZipStream = new ZipOutputStream(File.Create(fileNameZipped));
            this.m_ZipStream.SetLevel(6); // 0 - store only to 9 - means best compression
        }
        #endregion

        CloseZipFile#region CloseZipFile
        /**//**//**//// <summary>
        /// Close the Zip file
        /// </summary>
        private void CloseZipFile()
        {
            this.m_ZipStream.Finish();
            this.m_ZipStream.Close();
            this.m_ZipStream = null;
        }
        #endregion

        ZipSingleFile#region ZipSingleFile
        /**//**//**//// <summary>
        /// Zip single file 
        /// </summary>
        /// <param name="fileName">file name like "C:TestTest.txt"</param>
        private void ZipSingleFile(string fileNameToZip)
        {
            // Open and read this file
            FileStream fso = File.OpenRead(fileNameToZip);

            // Read this file to Buffer
            byte[] buffer = new byte[fso.Length];
            fso.Read(buffer,0,buffer.Length);

            // Create a new ZipEntry
            ZipEntry zipEntry = new ZipEntry(fileNameToZip.Split('\\')[fileNameToZip.Split('\\').Length - 1]);
            //ZipEntry zipEntry = new ZipEntry(fileNameToZip);

            zipEntry.DateTime = DateTime.Now;
            // set Size and the crc, because the information
            // about the size and crc should be stored in the header
            // if it is not set it is automatically written in the footer.
            // (in this case size == crc == -1 in the header)
            // Some ZIP programs have problems with zip files that don't store
            // the size and crc in the header.
            zipEntry.Size = fso.Length;

            fso.Close();
            fso = null;

            // Using CRC to format the buffer
            this.m_Crc.Reset();
            this.m_Crc.Update(buffer);
            zipEntry.Crc = this.m_Crc.Value;

            // Add this ZipEntry to the ZipStream
            this.m_ZipStream.PutNextEntry(zipEntry);
            this.m_ZipStream.Write(buffer,0,buffer.Length);
        }
        #endregion

        IDisposable member#region IDisposable member

        /**//**//**//// <summary>
        /// Release all objects
        /// </summary>
        public void Dispose()
        {
            if(this.m_ZipStream != null)
            {
                this.m_ZipStream.Close();
                this.m_ZipStream = null;
            }
        }

        #endregion

        将文件夹压缩文件#region 将文件夹压缩文件
        private ZipOutputStream zos = null;
        private string strBaseDir = "";
        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="strPath">要压缩的文件路径</param>
        /// <param name="strFileName">压缩后的文件名</param>
        public void DirectoryToZip(string strPath, string strFileName)
        {
            MemoryStream ms = null;
            HttpContext.Current.Response.ContentType = "application/octet-stream";
            strFileName = HttpUtility.UrlEncode(strFileName).Replace('+', ' ');
            HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + strFileName + ".zip");
            ms = new MemoryStream();
            zos = new ZipOutputStream(ms);
            strBaseDir = strPath + "\\";
            addZipEntry(strBaseDir);
            zos.Finish();
            zos.Close();
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.BinaryWrite(ms.ToArray());
            HttpContext.Current.Response.End();
        }

        public void addZipEntry(string PathStr)
        {
            DirectoryInfo di = new DirectoryInfo(PathStr);
            foreach (DirectoryInfo item in di.GetDirectories())
            {
                addZipEntry(item.FullName);
            }
            foreach (FileInfo item in di.GetFiles())
            {
                FileStream fs = File.OpenRead(item.FullName);
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                string strEntryName = item.FullName.Replace(strBaseDir, "");
                ZipEntry entry = new ZipEntry(strEntryName);
                //ZipEntry entry = new ZipEntry(strEntryName.Split('\\')[strEntryName.Split('\\').Length - 1]);
                zos.PutNextEntry(entry);
                zos.Write(buffer, 0, buffer.Length);
                fs.Close();
            }
        }
        #endregion



        ===压缩然后输出到页面===#region ===压缩然后输出到页面===
        /**//// <summary>
        /// 压缩然后输出到页面
        /// </summary>
        /// <param name="inputdirectory">输入文件夹</param>
        /// <param name="tmpdirectory">输出临时文件夹</param>
        /// <param name="strFileName">输出下载的文件名</param>
        public static void PackFiles(string inputdirectory, string tmpdirectory, string strFileName)
        {
            string exportfile = tmpdirectory + strFileName + ".ZIP";
            try
            {
                FastZip fz = new FastZip();
                fz.CreateEmptyDirectories = true;
                fz.CreateZip(exportfile, inputdirectory, true, "");
                fz = null;
                try
                {
                    //删除临时文件
                    Directory.Delete(inputdirectory, true);
                }
                catch
                {
                }

                DownLoadUtils.ExportFile(exportfile, strFileName + ".ZIP", true);

            }
            catch (Exception ex)
            {
                throw;
            }
        }

        #endregion 


    }


    


    ===解压===#region ===解压===
    public class ZipUtils
    {
        public class UnzipException : ApplicationException
        {
            public UnzipException(string msg) : base(msg) { }
        }

        /**//// <summary>
        /// 解压缩文件到指定目录
        /// </summary>
        /// <param name="filePath">表示压缩文件所在的路径</param>
        /// <param name="extractFolder">表示解压缩后文件存放的目录</param>
        public static void UnzipPack(string filePath, string extractFolder)
        {
            ZipConstants.DefaultCodePage = 936;//中文
            ZipInputStream s = null;
            try
            {
                s = new ZipInputStream(File.OpenRead(filePath));
                //zip文件的入口类
                ZipEntry theEntry;
                //遍历压缩文件的所有入口

                while (null != (theEntry = s.GetNextEntry()))
                {
                    //设置解压文件目录名和文件名

                    //string directoryName = Path.GetDirectoryName ( extractFolder );
                    string directoryName = extractFolder;
                    //MessageBox.Show("directoryName:{0}",directoryName );
                    string fileName = Path.GetFileName(theEntry.Name);
                    //生成解压目录
                    Directory.CreateDirectory(directoryName);
                    if (String.Empty != fileName)
                    {
                        //解压文件到指定文件夹
                        string path = directoryName + "/" + theEntry.Name;
                        FileInfo fileInfo = new FileInfo(path);
                        string str = path.Substring(0, path.Length - fileInfo.Name.Length - 1);
                        //MessageBox.Show(path );
                        if (!Directory.Exists(str)) Directory.CreateDirectory(str);
                        FileStream streamWriter = File.Create(path);
                        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();
                    }
                }
            }
            catch
            {
                throw new UnzipException("ZipFileNotFound");
            }
            finally
            {
                s.Close();
            }
        }
    }
    #endregion