C#压缩文件
一、引入ICSharpCode.SharpZipLib
新建个帮助类 ZipHelper.cs 然后 添加 dll 引用
二、添加完dll引用之后 我们 需要添加 这几个Using引用
using ICSharpCode.SharpZipLib.Checksums; using ICSharpCode.SharpZipLib.Zip; using System; using System.IO;
三、压缩单个文件
/// <summary> /// ZIP:压缩单个文件 /// add yuangang by 2016-06-13 /// </summary> /// <param name="FileToZip">需要压缩的文件（绝对路径）</param> /// <param name="ZipedPath">压缩后的文件路径（绝对路径）</param> /// <param name="ZipedFileName">压缩后的文件名称（文件名，默认 同源文件同名）</param> /// <param name="CompressionLevel">压缩等级（0 无 - 9 最高，默认 5）</param> /// <param name="BlockSize">缓存大小（每次写入文件大小，默认 2048）</param> /// <param name="IsEncrypt">是否加密（默认 加密）</param> public static void ZipFile(string FileToZip, string ZipedPath, string ZipedFileName = "", int CompressionLevel = 5, int BlockSize = 2048, bool IsEncrypt = true) { //如果文件没有找到，则报错 if (!System.IO.File.Exists(FileToZip)) { throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!"); } //文件名称（默认同源文件名称相同） string ZipFileName = string.IsNullOrEmpty(ZipedFileName) ? ZipedPath + "\\" + new FileInfo(FileToZip).Name.Substring(0, new FileInfo(FileToZip).Name.LastIndexOf('.')) + ".zip" : ZipedPath + "\\" + ZipedFileName + ".zip"; using (System.IO.FileStream ZipFile = System.IO.File.Create(ZipFileName)) { using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile)) { using (System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read)) { string fileName = FileToZip.Substring(FileToZip.LastIndexOf("\\") + 1); ZipEntry ZipEntry = new ZipEntry(fileName); if (IsEncrypt) { //压缩文件加密 ZipStream.Password = “123”; } ZipStream.PutNextEntry(ZipEntry); //设置压缩级别 ZipStream.SetLevel(CompressionLevel); //缓存大小 byte[] buffer = new byte[BlockSize]; int sizeRead = 0; try { do { sizeRead = StreamToZip.Read(buffer, 0, buffer.Length); ZipStream.Write(buffer, 0, sizeRead); } while (sizeRead > 0); } catch (System.Exception ex) { throw ex; } StreamToZip.Close(); } ZipStream.Finish(); ZipStream.Close(); } ZipFile.Close(); } }
四、压缩文件夹
/// <summary> /// ZIP压缩文件夹 /// </summary> /// <param name="DirectoryToZip">需要压缩的文件夹（绝对路径）</param> /// <param name="ZipedPath">压缩后的文件路径（绝对路径）</param> /// <param name="ZipedFileName">压缩后的文件名称（文件名，默认 同源文件夹同名）</param> /// <param name="Encrypt">是否加密（默认 不加密）</param> public static void ZipDirectory(string DirectoryToZip, string ZipedPath, string ZipedFileName = "", string Encrypt = "") { //如果目录不存在，则报错 if (!Directory.Exists(DirectoryToZip)) { throw new FileNotFoundException("指定的目录: " + DirectoryToZip + " 不存在!"); } //文件名称（默认同源文件名称相同） string ZipFileName = string.IsNullOrEmpty(ZipedFileName) ? ZipedPath + "\\" + new DirectoryInfo(DirectoryToZip).Name + ".zip" : ZipedPath + "\\" + ZipedFileName + ".zip"; using (System.IO.FileStream ZipFile = System.IO.File.Create(ZipFileName)) { using (ZipOutputStream s = new ZipOutputStream(ZipFile)) { if (!string.IsNullOrEmpty(Encrypt)) s.Password = Encrypt; ZipSetp(DirectoryToZip, s, ""); } } } /// <summary> /// 递归遍历目录 /// </summary> private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath) { if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar) { strDirectory += Path.DirectorySeparatorChar; } Crc32 crc = new Crc32(); string[] filenames = Directory.GetFileSystemEntries(strDirectory); foreach (string file in filenames)// 遍历所有的文件和目录 { if (Directory.Exists(file))// 先当作目录处理，如果存在这个目录就递归Copy该目录下面的文件 { string pPath = parentPath; pPath += file.Substring(file.LastIndexOf("\\") + 1); pPath += "\\"; ZipSetp(file, s, pPath); } else // 否则直接压缩文件 { //打开压缩文件 using (FileStream fs = File.OpenRead(file)) { byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1); ZipEntry entry = new ZipEntry(fileName); 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); } } } }
五、解压一个ZIP文件
/// <summary> /// ZIP:解压一个zip文件 /// add yuangang by 2016-06-13 /// </summary> /// <param name="ZipFile">需要解压的Zip文件（绝对路径）</param> /// <param name="TargetDirectory">解压到的目录</param> /// <param name="Password">解压密码</param> /// <param name="OverWrite">是否覆盖已存在的文件</param> public static void UnZip(string ZipFile, string TargetDirectory, string Password, bool OverWrite = true) { //如果解压到的目录不存在，则报错 if (!System.IO.Directory.Exists(TargetDirectory)) { throw new System.IO.FileNotFoundException("指定的目录: " + TargetDirectory + " 不存在!"); } //目录结尾 if (!TargetDirectory.EndsWith("\\")) { TargetDirectory = TargetDirectory + "\\"; } using (ZipInputStream zipfiles = new ZipInputStream(File.OpenRead(ZipFile))) { zipfiles.Password = Password; ZipEntry theEntry; while ((theEntry = zipfiles.GetNextEntry()) != null) { string directoryName = ""; string pathToZip = ""; pathToZip = theEntry.Name; if (pathToZip != "") directoryName = Path.GetDirectoryName(pathToZip) + "\\"; string fileName = Path.GetFileName(pathToZip); Directory.CreateDirectory(TargetDirectory + directoryName); if (fileName != "") { if ((File.Exists(TargetDirectory + directoryName + fileName) && OverWrite) || (!File.Exists(TargetDirectory + directoryName + fileName))) { using (FileStream streamWriter = File.Create(TargetDirectory + directoryName + fileName)) { int size = 2048; byte[] data = new byte[2048]; while (true) { size = zipfiles.Read(data, 0, data.Length); if (size > 0) streamWriter.Write(data, 0, size); else break; } streamWriter.Close(); } } } } zipfiles.Close(); } }
