C# .net 压缩文件解压上传及文件压缩下载
using ICSharpCode.SharpZipLib.Zip; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Web; namespace Lib { public class ZipHelper { private volatile static ZipHelper _instance = null; private static readonly object lockHelper = new object(); private ZipHelper() { } /// <summary> /// 单例模式, 考虑线程安全,只允许一个线程访问。 /// </summary> public static ZipHelper Instance { get { if (_instance == null) { lock (lockHelper) { if (_instance == null) _instance = new ZipHelper(); } } return _instance; } } /// <summary> /// 解压ZIP文件 /// </summary> /// <param name="zipFile"></param> /// <param name="targetDirectory"></param> /// <param name="passWord"></param> /// <param name="overWrite"></param> public ResultEx UnZip(HttpPostedFileBase file, string targetDirectory, string passWord, bool overWrite = true) { try { if (Directory.Exists(targetDirectory)) Directory.CreateDirectory(targetDirectory); if (!targetDirectory.EndsWith("\\")) targetDirectory += "\\"; using (ZipInputStream zipFiles = new ZipInputStream(file.InputStream)) { zipFiles.Password = passWord; ZipEntry theEntry; while ((theEntry = zipFiles.GetNextEntry()) != null) { string directoryName = string.Empty; 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(); } } } } } return ResultEx.Init(); } catch { return ResultEx.Init($"导入失败,当前只能导入ZIP格式请确认格式是否有问题!"); } } /// <summary> /// 某目录压缩成ZIP压缩文件 /// </summary> /// <param name="filesPath"></param> /// <param name="zipFilePath"></param> public static void CreateZipFile(string filesPath, string zipFilePath) { if (!Directory.Exists(filesPath)) { Console.WriteLine("Cannot find directory '{0}'", filesPath); return; } try { string[] filenames = Directory.GetFiles(filesPath); using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath))) { s.SetLevel(9); // 压缩级别 0-9 //s.Password = "123"; //Zip压缩文件密码 byte[] buffer = new byte[4096]; //缓冲区大小 foreach (string file in filenames) { ZipEntry entry = new ZipEntry(Path.GetFileName(file)); entry.DateTime = DateTime.Now; s.PutNextEntry(entry); using (FileStream fs = File.OpenRead(file)) { int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } s.Finish(); s.Close(); } } catch (Exception ex) { Console.WriteLine("Exception during processing {0}", ex); } } /// <summary> /// 选中文件压缩成ZIP文件 /// </summary> /// <param name="filenames">文件路径集合</param> /// <param name="zipFilePath">压缩后ZIP路径</param> /// <returns></returns> public ResultEx CreateZipFile(List<string> filenames, string zipFilePath,string OutName) { if (filenames.Count == 0) { return ResultEx.Init(false, "没有找到可以导出的证件"); } if (!Directory.Exists(zipFilePath)) Directory.CreateDirectory(zipFilePath); var zipFile = $"{OutName}{ DateTime.Now.ToString("yyyyMMddHHmmss")}.zip"; try { using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath + zipFile))) { s.SetLevel(9); // 压缩级别 0-9 //s.Password = "123"; //Zip压缩文件密码 byte[] buffer = new byte[4096]; //缓冲区大小 foreach (string file in filenames) { ZipEntry entry = new ZipEntry(Path.GetFileName(file)); entry.DateTime = DateTime.Now; s.PutNextEntry(entry); using (FileStream fs = File.OpenRead(file)) { int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } s.Finish(); s.Close(); } return ResultEx.Init(true, "压缩成功", zipFile); } catch (Exception ex) { return ResultEx.Init(ex); } } } }