C# 文件/文件夹压缩解压
标签：put value 默认 引用 crc indexof eve exception byte
第一次写，还有点小激动，项目上用到的，做个记录先，哈哈。
需要先引用ICSharpCode.SharpZipLib.dll
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 ///
11 /// 文件(夹)压缩、解压缩
12 ///
13 public class FileCompression
14 {
15 #region 压缩文件
16 ///
17 /// 压缩文件
18 ///
19 /// 要打包的文件列表
20 /// 目标文件名
21 /// 压缩品质级别（0~9）
22 /// 是否删除原文件
23 public static void CompressFile(List 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 compression
29 foreach (FileInfo file in fileNames)
30 {
31 FileStream fs = null;
32 try
33 {
34 fs = 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 {
46 size = fs.Read(data, 0, size);
47 if (size 0) break;
48 s.Write(data, 0, size);
49 }
50 fs.Close();
51 if (deleteFile)
52 {
53 file.Delete();
54 }
55 }
56 }
57 finally
58 {
59 s.Finish();
60 s.Close();
61 }
62 }
63 ///
64 /// 压缩文件夹
65 ///
66 /// 要打包的文件夹
67 /// 目标文件名
68 /// 压缩品质级别（0~9）
69 /// 是否删除原文件夹
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 Dictionarystring, DateTime> fileList = GetAllFies(dirPath);
87 foreach (KeyValuePairstring, 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 ///
109 /// 获取所有文件
110 ///
111 ///
112 private static Dictionarystring, DateTime> GetAllFies(string dir)
113 {
114 Dictionarystring, DateTime> FilesList = new Dictionarystring, 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 ///
125 /// 获取一个文件夹下的所有文件夹里的文件
126 ///
127 ///
128 ///
129 private static void GetAllDirsFiles(DirectoryInfo[] dirs, Dictionarystring, 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 ///
141 /// 获取一个文件夹下的文件
142 ///
143 /// 目录名称
144 /// 文件列表HastTable
145 private static void GetAllDirFiles(DirectoryInfo dir, Dictionarystring, DateTime> filesList)
146 {
147 foreach (FileInfo file in dir.GetFiles("*.*"))
148 {
149 filesList.Add(file.FullName, file.LastWriteTime);
150 }
151 }
152 #endregion
153 #region 解压缩文件
154 ///
155 /// 解压缩文件
156 ///
157 /// 压缩包文件名
158 /// 解压缩目标路径
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
174 if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);
175 }
176 else
177 {
178 if (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 #endregion
208 }
209 }
View Code
找了好久终于知道怎么把附件放上来了
源代码和dll在附件里面放着o(╥﹏╥)o：
https://files-cdn.cnblogs.com/files/DreamZhao/C%E5%8E%8B%E7%BC%A9%E6%96%87%E4%BB%B6.zip
C# 文件/文件夹压缩解压
标签：put value 默认 引用 crc indexof eve exception byte
原文地址：https://www.cnblogs.com/DreamZhao/p/MrYang.html
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