SharpZipLib进行文件的压缩和解压缩
一。压缩文件，生成文件流
using System; using System.Collections.Generic; using System.Text; using System.IO; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.Core; namespace TimeInterval { public class ZipFileBuilder : IDisposable { private bool disposed = false; ZipOutputStream zipStream = null; protected ZipOutputStream ZipStream { get { return zipStream; } } ZipEntryFactory factory = null; private ZipEntryFactory Factory { get { return factory; } } public ZipFileBuilder(Stream outStream) { zipStream = new ZipOutputStream(outStream); zipStream.SetLevel(9); //best compression factory = new ZipEntryFactory(DateTime.Now); } public void Add(string fileName, Stream fileStream) { //create a new zip entry ZipEntry entry = factory.MakeFileEntry(fileName); entry.DateTime = DateTime.Now; ZipStream.PutNextEntry(entry); byte[] buffer = new byte[65536]; int sourceBytes; do { sourceBytes = fileStream.Read(buffer, 0, buffer.Length); ZipStream.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } public void AddDirectory(string directoryName) { ZipEntry entry = factory.MakeDirectoryEntry(directoryName); ZipStream.PutNextEntry(entry); } public void Finish() { if (!ZipStream.IsFinished) { ZipStream.Finish(); } } public void Close() { Dispose(true); GC.SuppressFinalize(this); } public void Dispose() { this.Close(); } protected virtual void Dispose(bool disposing) { if (!disposed) { if (disposing) { if (ZipStream != null) ZipStream.Dispose(); } } disposed = true; } } }
#region ZIP using (MemoryStream ms = new MemoryStream()) { using (ZipFileBuilder builder = new ZipFileBuilder(ms)) { AddFile(builder, @"D:\Cadence\A202.xls", @"D:\Cadence\"); } //文件流写入zip文件 FileStream fs = new FileStream(@"d:\Cadence\ZipFile.zip", FileMode.OpenOrCreate); BinaryWriter w = new BinaryWriter(fs); w.Write(ms.ToArray()); fs.Close(); ms.Close(); } #endregion
二。包括压缩和解压缩
using System; using System.Collections.Generic; using System.Text; using ICSharpCode.SharpZipLib.Zip; using System.IO; namespace LicenseMaintenance { public class CZip:ICompress { private Exception _ex; private int bufflen=4096; public CZip() { } /// <summary> /// 取出当前文件目录中的所有子目录 /// </summary> /// <param name="dir">当前目录对象</param> /// <param name="fis">子目录列表</param> protected void Found(DirectoryInfo dir, List<DirectoryInfo> fis) { if (dir == null) return; fis.Add(dir); DirectoryInfo[] dirs = dir.GetDirectories(); foreach (DirectoryInfo item in dirs) Found(item, fis); } /// <summary> /// 取得目标文件的文件名 /// </summary> /// <param name="srcpath">源文件路径</param> /// <param name="despath">目标文件路径</param> /// <returns></returns> protected string GetDesFile(string srcpath, string despath) { string desfile = Path.GetFileName(despath); string desdir = Path.GetDirectoryName(despath); if (string.IsNullOrEmpty(desfile)) //目标文件路路径中指定的文件名则直接返回，否则按以下方式读取 { string srcfile = Path.GetFileName(srcpath); string srcdir = Path.GetDirectoryName(srcpath); if (!string.IsNullOrEmpty(srcfile)) //压缩单个文件时，取源文件名为目标文件名 { desfile = Path.GetFileNameWithoutExtension(srcfile) + ".zip"; } else if (!Path.IsPathRooted(desdir)) //如果目标文件路径不是根目录名，取目标目录为文件名 { string[] str = desdir.Split(Path.DirectorySeparatorChar); desfile = str[str.Length - 1] + ".zip"; } else { string[] str = srcdir.Split(Path.DirectorySeparatorChar); //否则取原文件目录为目标文件名 desfile = str[str.Length - 1] + ".zip"; } } return desfile; } #region ICompress Members //public bool CompressSingleFile(string filePath, string CompressFilepath) //{ // int cnt = 0; // ZipOutputStream zipstream = null; // Stream stream = null; // BinaryReader sr = null; // byte[] buffer = new byte[bufflen]; // try // { // stream = new FileStream(CompressFilepath, FileMode.OpenOrCreate); // zipstream = new ZipOutputStream(stream); // zipstream.UseZip64 = UseZip64.Off; // //zipstream.Password = ""; // FileInfo f = new FileInfo(filePath); // zipstream.PutNextEntry(new ZipEntry(f.Name.Replace(filePath, ""))); // sr = new BinaryReader(f.Open(FileMode.Open)); // while ((cnt = sr.Read(buffer, 0, bufflen)) > 0) // { // zipstream.Write(buffer, 0, cnt); // } // sr.Close(); // zipstream.Flush(); // zipstream.Close(); // stream.Close(); // return true; // } // catch (Exception e) // { // _ex = e; // } // return false; //} public bool CompressSingleFile(string filePath, string CompressFilepath) { try { if (File.Exists(CompressFilepath)) { using (ZipFile zip = new ZipFile(CompressFilepath)) { zip.BeginUpdate(); zip.Add(filePath); zip.CommitUpdate(); } } else { using (ZipFile zip = ZipFile.Create(CompressFilepath)) { zip.BeginUpdate(); zip.Add(filePath); zip.CommitUpdate(); } } return true; } catch (Exception e) { _ex = e; } return false; //int cnt = 0; //byte[] buffer = new byte[bufflen]; //try //{ // using (ZipOutputStream zipstream = new ZipOutputStream(new FileStream(CompressFilepath, FileMode.OpenOrCreate))) // { // ZipEntry entry = null; // zipstream.UseZip64 = UseZip64.Off; // ZipInputStream p = new ZipInputStream(File.OpenRead(CompressFilepath)); // while ((entry = p.GetNextEntry()) != null) // { // ZipEntry zipEntry = new ZipEntry(entry.Name); // //zipEntry.DateTime = DateTime.Now; // zipstream.PutNextEntry(zipEntry); // //byte[] buffer = new byte[204800]; // while ((cnt = p.Read(buffer, 0, bufflen)) > 0) // { // zipstream.Write(buffer, 0, cnt); // } // } // FileInfo f = new FileInfo(filePath); // zipstream.PutNextEntry(new ZipEntry(f.Name.Replace(filePath, ""))); // BinaryReader sr = null; // sr = new BinaryReader(f.Open(FileMode.Open)); // while ((cnt = sr.Read(buffer, 0, bufflen)) > 0) // { // zipstream.Write(buffer, 0, cnt); // } // zipstream.Flush(); // zipstream.Close(); // p.Close(); // sr.Close(); // } // return true; //} //catch (Exception e) //{ // _ex = e; //} //return false; } /// <summary> /// 压缩方法 /// </summary> /// <param name="srcpath">源文件路径</param> /// <param name="despath">目标文件路径</param> /// <returns></returns> public bool Compress(string srcpath, string despath) { return Compress(srcpath, despath,""); } /// <summary> /// 压缩方法 /// </summary> /// <param name="srcpath">源文件路径</param> /// <param name="despath">目标文件路径</param> /// <param name="psw">密码</param> /// <returns></returns> public bool Compress(string srcpath, string despath, string psw) { int index = 0, cnt = 0; List<DirectoryInfo> list = new List<DirectoryInfo>(); ZipOutputStream zipstream = null; Stream stream = null; BinaryReader sr = null; string srcdir = "", srcfile=""; string desdir = Path.GetDirectoryName(despath); string desfile = ""; byte[] buffer = new byte[bufflen]; if (!File.Exists(srcpath) && !Directory.Exists(srcpath) || string.IsNullOrEmpty(desdir)) { _ex = new Exception("Invalid path."); return false; } if (File.Exists(srcpath)) { srcdir = Path.GetDirectoryName(srcpath); srcfile = Path.GetFileName(srcpath); } else { srcdir = srcpath; srcfile = ""; } desfile = GetDesFile(srcpath, despath); if (string.IsNullOrEmpty(desfile)) { _ex = new Exception("Invalid target path."); return false; } try { if (!Directory.Exists(desdir)) Directory.CreateDirectory(desdir); Found(new DirectoryInfo(srcdir),list); stream = new FileStream(Path.Combine(desdir, desfile), FileMode.OpenOrCreate); zipstream = new ZipOutputStream(stream); zipstream.UseZip64 = UseZip64.Off; if (!string.IsNullOrEmpty(psw)) zipstream.Password = psw; foreach (DirectoryInfo item in list) { string dir = Path.GetDirectoryName(item.FullName); //zipstream.PutNextEntry(new ZipEntry(dir)); foreach (FileInfo f in item.GetFiles()) { zipstream.PutNextEntry(new ZipEntry(f.Name.Replace(srcdir,""))); sr = new BinaryReader(f.Open(FileMode.Open)); while ((cnt = sr.Read(buffer, 0, bufflen)) > 0) { zipstream.Write(buffer, 0, cnt); } sr.Close(); } } zipstream.Flush(); zipstream.Close(); stream.Close(); return true; } catch (Exception e) { _ex = e; } return false; } /// <summary> /// 解压方法 /// </summary> /// <param name="srcpath">源文件路径</param> /// <param name="despath">目标文件路径</param> /// <returns></returns> public bool UnCompress(string srcpath, string despath) { return UnCompress(srcpath, despath,""); } /// <summary> /// 解压方法 /// </summary> /// <param name="srcpath">源文件路径</param> /// <param name="despath">目标文件路径</param> /// <param name="psw">密码</param> /// <returns></returns> public bool UnCompress(string srcpath, string despath, string psw) { int index = 0, cnt = 0; List<FileInfo> list = new List<FileInfo>(); ZipInputStream zipstream = null; FileStream stream = null; byte[] buffer = new byte[bufflen]; if (File.Exists(srcpath)) { _ex = new System.IO.FileNotFoundException(); return false; } string desdir=string.IsNullOrEmpty(despath) ? Directory.GetCurrentDirectory():Path.GetDirectoryName(despath); try { if (Directory.Exists(desdir)) Directory.CreateDirectory(desdir); stream = File.Open(srcpath, FileMode.Open); zipstream = new ZipInputStream(stream); ZipEntry entry =null; if (!string.IsNullOrEmpty(psw)) zipstream.Password = psw; while ((entry = zipstream.GetNextEntry()) != null) { if (entry.IsDirectory) { Directory.CreateDirectory(Path.Combine(desdir, entry.Name)); } else if (entry.IsFile && entry.Crc != 0) { string desfile = Path.Combine(desdir, entry.Name); using (FileStream sw = new FileStream(desfile, FileMode.OpenOrCreate)) { while ((cnt = zipstream.Read(buffer, 0, bufflen)) > 0) { sw.Write(buffer, 0, cnt); } sw.Close(); } } } zipstream.Close(); stream.Close(); return true; } catch (Exception e) { _ex = e; } return false; } /// <summary> /// 设置当前接口的执行参数 /// </summary> /// <param name="key">键名</param> /// <param name="v">值</param> public void SetArguments(string key, object v) { if (!string.IsNullOrEmpty(key)) return; if (key.ToLower() == "buffersize") { bufflen = (int)v; } } /// <summary> /// 取得当前压缩器的执行参数 /// </summary> /// <param name="key">键名</param> /// <returns></returns> public object GetArguments(string key) { if (string.IsNullOrEmpty(key)) return null; if (key.ToLower() == "buffersize") return bufflen; return null; } /// <summary> /// 取出最后一次错误 /// </summary> /// <returns></returns> public Exception GetLastError() { return _ex; } #endregion } }
using System; using System.Collections.Generic; using System.Text; namespace LicenseMaintenance { public interface ICompress { void SetArguments(string key, object v); object GetArguments(string key); bool CompressSingleFile(string srcpath, string despath); bool Compress(string srcpath,string despath); bool Compress(string srcpath,string despath , string psw); bool UnCompress(string srcpath, string despath); bool UnCompress(string srcpath, string despath, string psw); Exception GetLastError(); } }
使用方法压缩：
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public static bool ZipFile(string filePath, string zipPath) { //XZip.ZipClass objZip = new XZip.ZipClass(); ICompress objZip = new CZip(); try { //objZip.Pack(filePath, zipPath, false, "", 1); objZip.CompressSingleFile(filePath, zipPath); System.IO.File.Delete(filePath); } catch (Exception ex) { throw ex; } return true; }优质内容筛选与推荐>>
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