本文主要是介绍通过ICSharpCode.SharpZipLib类库对zip文件进行压缩与解压，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;namespace DataDisplay.Utilities
{public class ZipHelper{#region 压缩/// <summary> /// 递归压缩文件夹的内部方法 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipStream">压缩输出流</param> /// <param name="parentFolderName">此文件夹的上级文件夹</param> /// <returns></returns> private static bool ZipDirectory(string folderToZip, ZipOutputStream zipStream, string parentFolderName){bool result = true;string[] folders, files;ZipEntry ent = null;FileStream fs = null;Crc32 crc = new Crc32();try{ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/"));zipStream.PutNextEntry(ent);zipStream.Flush();files = Directory.GetFiles(folderToZip);foreach (string file in files){fs = File.OpenRead(file);byte[] buffer = new byte[fs.Length];fs.Read(buffer, 0, buffer.Length);ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file)));ent.DateTime = DateTime.Now;ent.Size = fs.Length;fs.Close();crc.Reset();crc.Update(buffer);ent.Crc = crc.Value;zipStream.PutNextEntry(ent);zipStream.Write(buffer, 0, buffer.Length);}}catch{result = false;}finally{if (fs != null){fs.Close();fs.Dispose();}if (ent != null){ent = null;}GC.Collect();GC.Collect(1);}folders = Directory.GetDirectories(folderToZip);foreach (string folder in folders)if (!ZipDirectory(folder, zipStream, folderToZip))return false;return result;}/// <summary> /// 压缩文件夹 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipedFile">压缩文件完整路径</param> /// <param name="password">密码</param> /// <returns>是否压缩成功</returns> public static bool ZipDirectory(string folderToZip, string zipedFile, string password){bool result = false;if (!Directory.Exists(folderToZip))return result;ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile));zipStream.SetLevel(6);if (!string.IsNullOrEmpty(password)) zipStream.Password = password;result = ZipDirectory(folderToZip, zipStream, "");zipStream.Finish();zipStream.Close();return result;}/// <summary> /// 压缩文件夹 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipedFile">压缩文件完整路径</param> /// <returns>是否压缩成功</returns> public static bool ZipDirectory(string folderToZip, string zipedFile){bool result = ZipDirectory(folderToZip, zipedFile, null);return result;}/// <summary> /// 压缩文件 /// </summary> /// <param name="fileToZip">要压缩的文件全名</param> /// <param name="zipedFile">压缩后的文件名</param> /// <param name="password">密码</param> /// <returns>压缩结果</returns> public static bool ZipFile(string fileToZip, string zipedFile, string password){bool result = true;ZipOutputStream zipStream = null;FileStream fs = null;ZipEntry ent = null;if (!File.Exists(fileToZip))return false;try{fs = File.OpenRead(fileToZip);byte[] buffer = new byte[fs.Length];fs.Read(buffer, 0, buffer.Length);fs.Close();fs = File.Create(zipedFile);zipStream = new ZipOutputStream(fs);if (!string.IsNullOrEmpty(password)) zipStream.Password = password;ent = new ZipEntry(Path.GetFileName(fileToZip));zipStream.PutNextEntry(ent);zipStream.SetLevel(6);zipStream.Write(buffer, 0, buffer.Length);}catch{result = false;}finally{if (zipStream != null){zipStream.Finish();zipStream.Close();}if (ent != null){ent = null;}if (fs != null){fs.Close();fs.Dispose();}}GC.Collect();GC.Collect(1);return result;}/// <summary> /// 压缩文件 /// </summary> /// <param name="fileToZip">要压缩的文件全名</param> /// <param name="zipedFile">压缩后的文件名</param> /// <returns>压缩结果</returns> public static bool ZipFile(string fileToZip, string zipedFile){bool result = ZipFile(fileToZip, zipedFile, null);return result;}/// <summary> /// 压缩文件或文件夹 /// </summary> /// <param name="fileToZip">要压缩的路径</param> /// <param name="zipedFile">压缩后的文件名</param> /// <param name="password">密码</param> /// <returns>压缩结果</returns> public static bool Zip(string fileToZip, string zipedFile, string password){bool result = false;if (Directory.Exists(fileToZip))result = ZipDirectory(fileToZip, zipedFile, password);else if (File.Exists(fileToZip))result = ZipFile(fileToZip, zipedFile, password);return result;}/// <summary> /// 压缩文件或文件夹 /// </summary> /// <param name="fileToZip">要压缩的路径</param> /// <param name="zipedFile">压缩后的文件名</param> /// <returns>压缩结果</returns> public static bool Zip(string fileToZip, string zipedFile){bool result = Zip(fileToZip, zipedFile, null);return result;}#endregion#region 解压/// <summary> /// 功能：解压zip格式的文件。 /// </summary> /// <param name="zipFilePath">压缩文件路径</param> /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param> /// <param name="err">出错信息</param> /// <returns>解压是否成功</returns> public bool UnZipFile(string zipFilePath, string unZipDir)// , out string err {// err = ""; if (zipFilePath == string.Empty){//err = "压缩文件不能为空！"; return false;}if (!File.Exists(zipFilePath)){//err = "压缩文件不存在！"; return false;}//解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹 if (unZipDir == string.Empty)unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));if (!unZipDir.EndsWith("\\"))unZipDir += "\\";if (!Directory.Exists(unZipDir))Directory.CreateDirectory(unZipDir);try{using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath.ToLower()))){ZipEntry theEntry;while ((theEntry = s.GetNextEntry()) != null){string directoryName = Path.GetDirectoryName(theEntry.Name);string fileName = Path.GetFileName(theEntry.Name);if (directoryName.Length > 0){Directory.CreateDirectory(unZipDir + directoryName);}if (!directoryName.EndsWith("\\"))directoryName += "\\";if (fileName != String.Empty){using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name)){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;}}}}}//while }}catch (Exception ex){//err = ex.Message; return false;}return true;}//解压结束 #endregion}
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