项目上用到的，随手做个记录，哈哈。
直接上代码：
1 using System; 2 using System.Data; 3 using System.Configuration; 4 using System.Collections.Generic; 5 using System.IO; 6 using ICSharpCode.SharpZipLib.Zip; 7 using ICSharpCode.SharpZipLib.Checksums; 8 namespace BLL 9 { 10/// <summary> 11/// 文件(夹)压缩、解压缩 12/// </summary> 13public class FileCompression 14{ 15 #region 压缩文件 16 /// <summary>17 /// 压缩文件18 /// </summary>19 /// <param name="fileNames">要打包的文件列表</param>20 /// <param name="GzipFileName">目标文件名</param>21 /// <param name="CompressionLevel">压缩品质级别（0~9）</param>22 /// <param name="deleteFile">是否删除原文件</param> 23 public static void CompressFile(List<FileInfo> fileNames, string GzipFileName, int CompressionLevel, bool deleteFile) 24 { 25 ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName)); 26 try 27 { 28 s.SetLevel(CompressionLevel); //0 - store only to 9 - means best compression29 foreach (FileInfo file in fileNames) 30 { 31 FileStream fs = null; 32 try 33 { 34fs = file.Open(FileMode.Open, FileAccess.ReadWrite); 35 } 36 catch 37 { continue; } 38 // 方法二，将文件分批读入缓冲区39 byte[] data = new byte[2048]; 40 int size = 2048; 41 ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name)); 42 entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime); 43 s.PutNextEntry(entry); 44 while (true) 45 { 46size = fs.Read(data, 0, size); 47if (size <= 0) break; 48s.Write(data, 0, size); 49 } 50 fs.Close(); 51 if (deleteFile) 52 { 53file.Delete(); 54 } 55 } 56 } 57 finally 58 { 59 s.Finish(); 60 s.Close(); 61 } 62 } 63 /// <summary>64 /// 压缩文件夹65 /// </summary>66 /// <param name="dirPath">要打包的文件夹</param>67 /// <param name="GzipFileName">目标文件名</param>68 /// <param name="CompressionLevel">压缩品质级别（0~9）</param>69 /// <param name="deleteDir">是否删除原文件夹</param> 70 public static void CompressDirectory(string dirPath, string GzipFileName, int CompressionLevel, bool deleteDir) 71 { 72 //压缩文件为空时默认与压缩文件夹同一级目录73 if (GzipFileName == string.Empty) 74 { 75 GzipFileName = dirPath.Substring(dirPath.LastIndexOf("//") + 1); 76 GzipFileName = dirPath.Substring(0, dirPath.LastIndexOf("//")) + "//" + GzipFileName + ".zip"; 77 } 78 //if (Path.GetExtension(GzipFileName) != ".zip") 79 //{ 80 // GzipFileName = GzipFileName + ".zip"; 81 //} 82 using (ZipOutputStream zipoutputstream = new ZipOutputStream(File.Create(GzipFileName))) 83 { 84 zipoutputstream.SetLevel(CompressionLevel); 85 Crc32 crc = new Crc32(); 86 Dictionary<string, DateTime> fileList = GetAllFies(dirPath); 87 foreach (KeyValuePair<string, DateTime> item in fileList) 88 { 89 FileStream fs = File.OpenRead(item.Key.ToString()); 90 byte[] buffer = new byte[fs.Length]; 91 fs.Read(buffer, 0, buffer.Length); 92 ZipEntry entry = new ZipEntry(item.Key.Substring(dirPath.Length)); 93 entry.DateTime = item.Value; 94 entry.Size = fs.Length; 95 fs.Close(); 96 crc.Reset(); 97 crc.Update(buffer); 98 entry.Crc = crc.Value; 99 zipoutputstream.PutNextEntry(entry);100 zipoutputstream.Write(buffer, 0, buffer.Length);101 }102 }103 if (deleteDir)104 {105 Directory.Delete(dirPath, true);106 }107 }108 /// <summary> 109 /// 获取所有文件 110 /// </summary> 111 /// <returns></returns> 112 private static Dictionary<string, DateTime> GetAllFies(string dir)113 {114 Dictionary<string, DateTime> FilesList = new Dictionary<string, DateTime>();115 DirectoryInfo fileDire = new DirectoryInfo(dir);116 if (!fileDire.Exists)117 {118 throw new System.IO.FileNotFoundException("目录:" + fileDire.FullName + "没有找到!");119 }120 GetAllDirFiles(fileDire, FilesList);121 GetAllDirsFiles(fileDire.GetDirectories(), FilesList);122 return FilesList;123 }124 /// <summary> 125 /// 获取一个文件夹下的所有文件夹里的文件 126 /// </summary> 127 /// <param name="dirs"></param> 128 /// <param name="filesList"></param> 129 private static void GetAllDirsFiles(DirectoryInfo[] dirs, Dictionary<string, DateTime> filesList)130 {131 foreach (DirectoryInfo dir in dirs)132 {133 foreach (FileInfo file in dir.GetFiles("*.*"))134 {135 filesList.Add(file.FullName, file.LastWriteTime);136 }137 GetAllDirsFiles(dir.GetDirectories(), filesList);138 }139 }140 /// <summary> 141 /// 获取一个文件夹下的文件 142 /// </summary> 143 /// <param name="dir">目录名称</param> 144 /// <param name="filesList">文件列表HastTable</param> 145 private static void GetAllDirFiles(DirectoryInfo dir, Dictionary<string, DateTime> filesList)146 {147 foreach (FileInfo file in dir.GetFiles("*.*"))148 {149 filesList.Add(file.FullName, file.LastWriteTime);150 }151 }152 #endregion153 #region 解压缩文件154 /// <summary> 155 /// 解压缩文件 156 /// </summary> 157 /// <param name="GzipFile">压缩包文件名</param> 158 /// <param name="targetPath">解压缩目标路径</param> 159 public static void Decompress(string GzipFile, string targetPath)160 {161 //string directoryName = Path.GetDirectoryName(targetPath + "//") + "//"; 162 string directoryName = targetPath;163 if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);//生成解压目录 164 string CurrentDirectory = directoryName;165 byte[] data = new byte[2048];166 int size = 2048;167 ZipEntry theEntry = null;168 using (ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile)))169 {170 while ((theEntry = s.GetNextEntry()) != null)171 {172 if (theEntry.IsDirectory)173 {// 该结点是目录 174if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);175 }176 else177 {178if (theEntry.Name != String.Empty)179{180 // 检查多级目录是否存在 181 if (theEntry.Name.Contains("//"))182 {183 string parentDirPath = theEntry.Name.Remove(theEntry.Name.LastIndexOf("//") + 1);184 if (!Directory.Exists(parentDirPath))185 {186 Directory.CreateDirectory(CurrentDirectory + parentDirPath);187 }188 }189 190 //解压文件到指定的目录 191 using (FileStream streamWriter = File.Create(CurrentDirectory + theEntry.Name))192 {193 while (true)194 {195 size = s.Read(data, 0, data.Length);196 if (size <= 0) break;197 streamWriter.Write(data, 0, size);198 }199 streamWriter.Close();200 }201}202 }203 }204 s.Close();205 }206 }207 #endregion208}209 }
View Code
封装的很彻底，基本不用修改什么，直接拿来用就行了。
找了很久，终于知道怎么把源代码附上了
源代码：/files/hahahayang/C%E5%8E%8B%E7%BC%A9%E6%96%87%E4%BB%B6.zip
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