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
