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本文只列举一个压缩帮助类,使用的是有要添加一个dll引用ICSharpCode.SharpZipLib.dll【】。另外说明一下的是,这个类压缩格式是ZIP的,所以文件的后缀写成 .zip。还有,如果用这个类来解压rar格式的压缩文件时会报错,就网上说的那个"Wrong Local header signature: 0x21726152"异常。只要解压ZIP压缩格式的压缩文件就不会报错了。 下面就是Helper类的代码:
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using ICSharpCode.SharpZipLib;using ICSharpCode.SharpZipLib.Zip;using ICSharpCode.SharpZipLib.Checksums;namespace CLeopardZip{ ////// 适用与ZIP压缩 /// public class ZipHelper { #region 压缩 ////// 递归压缩文件夹的内部方法 /// /// 要压缩的文件夹路径 /// 压缩输出流 /// 此文件夹的上级文件夹 ///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; } /// /// 压缩文件夹 /// /// 要压缩的文件夹路径 /// 压缩文件完整路径 /// 密码 ///是否压缩成功 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; } ////// 压缩文件夹 /// /// 要压缩的文件夹路径 /// 压缩文件完整路径 ///是否压缩成功 public static bool ZipDirectory(string folderToZip, string zipedFile) { bool result = ZipDirectory(folderToZip, zipedFile, null); return result; } ////// 压缩文件 /// /// 要压缩的文件全名 /// 压缩后的文件名 /// 密码 ///压缩结果 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; } ////// 压缩文件 /// /// 要压缩的文件全名 /// 压缩后的文件名 ///压缩结果 public static bool ZipFile(string fileToZip, string zipedFile) { bool result = ZipFile(fileToZip, zipedFile, null); return result; } ////// 压缩文件或文件夹 /// /// 要压缩的路径 /// 压缩后的文件名 /// 密码 ///压缩结果 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; } ////// 压缩文件或文件夹 /// /// 要压缩的路径 /// 压缩后的文件名 ///压缩结果 public static bool Zip(string fileToZip, string zipedFile) { bool result = Zip(fileToZip, zipedFile, null); return result; } #endregion #region 解压 ////// 解压功能(解压压缩文件到指定目录) /// /// 待解压的文件 /// 指定解压目标目录 /// 密码 ///解压结果 public static bool UnZip(string fileToUnZip, string zipedFolder, string password) { bool result = true; FileStream fs = null; ZipInputStream zipStream = null; ZipEntry ent = null; string fileName; if (!File.Exists(fileToUnZip)) return false; if (!Directory.Exists(zipedFolder)) Directory.CreateDirectory(zipedFolder); try { zipStream = new ZipInputStream(File.OpenRead(fileToUnZip)); if (!string.IsNullOrEmpty(password)) zipStream.Password = password; while ((ent = zipStream.GetNextEntry()) != null) { if (!string.IsNullOrEmpty(ent.Name)) { fileName = Path.Combine(zipedFolder, ent.Name); fileName = fileName.Replace('/', '\\');//change by Mr.HopeGi if (fileName.EndsWith("\\")) { Directory.CreateDirectory(fileName); continue; } fs = File.Create(fileName); int size = 2048; byte[] data = new byte[size]; while (true) { size = fs.Read(data, 0, data.Length); if (size > 0) fs.Write(data, 0, data.Length); else break; } } } } catch { result = false; } finally { if (fs != null) { fs.Close(); fs.Dispose(); } if (zipStream != null) { zipStream.Close(); zipStream.Dispose(); } if (ent != null) { ent = null; } GC.Collect(); GC.Collect(1); } return result; } ////// 解压功能(解压压缩文件到指定目录) /// /// 待解压的文件 /// 指定解压目标目录 ///解压结果 public static bool UnZip(string fileToUnZip, string zipedFolder) { bool result = UnZip(fileToUnZip, zipedFolder, null); return result; } #endregion }}
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