先给大家看一下效果：

一、引入ICSharpCode.SharpZipLib

我们新建个帮助类 ZipHelper.cs 然后添加 dll 引用

二、添加完dll引用之后我们需要添加这几个Using引用

1 using ICSharpCode.SharpZipLib.Checksums;
2 using ICSharpCode.SharpZipLib.Zip;
3 using System;4 using System.IO;

三、压缩单个文件

这里我添加了几个参数大家可以根据自己的需要修改一下

1 /// <summary>
2 /// ZIP:压缩单个文件
3 /// add yuangang by 2016-06-13
4 /// </summary>
5 /// <param name="FileToZip">需要压缩的文件（绝对路径）</param>
6 /// <param name="ZipedPath">压缩后的文件路径（绝对路径）</param>
7 /// <param name="ZipedFileName">压缩后的文件名称（文件名，默认同源文件同名）</param>
8 /// <param name="CompressionLevel">压缩等级（0 无 - 9 最高，默认 5）</param>
9 /// <param name="BlockSize">缓存大小（每次写入文件大小，默认 2048）</param>
10 /// <param name="IsEncrypt">是否加密（默认加密）</param>
11 public static void ZipFile(string FileToZip, string ZipedPath, string ZipedFileName = "", int CompressionLevel = 5, int BlockSize = 2048, bool IsEncrypt = true)
12 {
13 //如果文件没有找到，则报错
14 if (!System.IO.File.Exists(FileToZip))
15 {
16 throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
17 }
18
19 //文件名称（默认同源文件名称相同）
20 string ZipFileName = string.IsNullOrEmpty(ZipedFileName) ? ZipedPath + "\\" + new FileInfo(FileToZip).Name.Substring(0, new FileInfo(FileToZip).Name.LastIndexOf('.')) + ".zip" : ZipedPath + "\\" + ZipedFileName + ".zip";
21
22 using (System.IO.FileStream ZipFile = System.IO.File.Create(ZipFileName))
23 {
24 using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
25 {
26 using (System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read))
27 {
28 string fileName = FileToZip.Substring(FileToZip.LastIndexOf("\\") + 1);
29
30 ZipEntry ZipEntry = new ZipEntry(fileName);
31
32 if (IsEncrypt)
33 {
34 //压缩文件加密
35 ZipStream.Password = “123”;
36 }
37
38 ZipStream.PutNextEntry(ZipEntry);
39
40 //设置压缩级别
41 ZipStream.SetLevel(CompressionLevel);
42
43 //缓存大小
44 byte[] buffer = new byte[BlockSize];
45
46 int sizeRead = 0;
47
48 try
49 {
50 do
51 {
52 sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
53 ZipStream.Write(buffer, 0, sizeRead);
54 }
55 while (sizeRead > 0);
56 }
57 catch (System.Exception ex)
58 {
59 throw ex;
60 }
61
62 StreamToZip.Close();
63 }
64
65 ZipStream.Finish();
66 ZipStream.Close();
67 }
68
69 ZipFile.Close();
70 }
71 }

四、压缩文件夹

1 /// <summary>
2 /// ZIP：压缩文件夹
3 /// add yuangang by 2016-06-13
4 /// </summary>
5 /// <param name="DirectoryToZip">需要压缩的文件夹（绝对路径）</param>
6 /// <param name="ZipedPath">压缩后的文件路径（绝对路径）</param>
7 /// <param name="ZipedFileName">压缩后的文件名称（文件名，默认同源文件夹同名）</param>
8 /// <param name="IsEncrypt">是否加密（默认加密）</param>
9 public static void ZipDirectory(string DirectoryToZip, string ZipedPath, string ZipedFileName = "", bool IsEncrypt = true)
10 {
11 //如果目录不存在，则报错
12 if (!System.IO.Directory.Exists(DirectoryToZip))
13 {
14 throw new System.IO.FileNotFoundException("指定的目录: " + DirectoryToZip + " 不存在!");
15 }
16
17 //文件名称（默认同源文件名称相同）
18 string ZipFileName = string.IsNullOrEmpty(ZipedFileName) ? ZipedPath + "\\" + new DirectoryInfo(DirectoryToZip).Name + ".zip" : ZipedPath + "\\" + ZipedFileName + ".zip";
19
20 using (System.IO.FileStream ZipFile = System.IO.File.Create(ZipFileName))
21 {
22 using (ZipOutputStream s = new ZipOutputStream(ZipFile))
23 {
24 if (IsEncrypt)
25 {
26 //压缩文件加密
27 s.Password = “123”;
28 }
29 ZipSetp(DirectoryToZip, s, "");
30 }
31 }
32 }
33 /// <summary>
34 /// 递归遍历目录
35 /// add yuangang by 2016-06-13
36 /// </summary>
37 private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
38 {
39 if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
40 {
41 strDirectory += Path.DirectorySeparatorChar;
42 }
43 Crc32 crc = new Crc32();
44
45 string[] filenames = Directory.GetFileSystemEntries(strDirectory);
46
47 foreach (string file in filenames)// 遍历所有的文件和目录
48 {
49
50 if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
51 {
52 string pPath = parentPath;
53 pPath += file.Substring(file.LastIndexOf("\\") + 1);
54 pPath += "\\";
55 ZipSetp(file, s, pPath);
56 }
57
58 else // 否则直接压缩文件
59 {
60 //打开压缩文件
61 using (FileStream fs = File.OpenRead(file))
62 {
63
64 byte[] buffer = new byte[fs.Length];
65 fs.Read(buffer, 0, buffer.Length);
66
67 string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1);
68 ZipEntry entry = new ZipEntry(fileName);
69
70 entry.DateTime = DateTime.Now;
71 entry.Size = fs.Length;
72
73 fs.Close();
74
75 crc.Reset();
76 crc.Update(buffer);
77
78 entry.Crc = crc.Value;
79 s.PutNextEntry(entry);
80
81 s.Write(buffer, 0, buffer.Length);
82 }
83 }
84 }
85 }

五、解压一个ZIP文件

1 /// <summary>
2 /// ZIP:解压一个zip文件
3 /// add yuangang by 2016-06-13
4 /// </summary>
5 /// <param name="ZipFile">需要解压的Zip文件（绝对路径）</param>
6 /// <param name="TargetDirectory">解压到的目录</param>
7 /// <param name="Password">解压密码</param>
8 /// <param name="OverWrite">是否覆盖已存在的文件</param>
9 public static void UnZip(string ZipFile, string TargetDirectory, string Password, bool OverWrite = true)
10 {
11 //如果解压到的目录不存在，则报错
12 if (!System.IO.Directory.Exists(TargetDirectory))
13 {
14 throw new System.IO.FileNotFoundException("指定的目录: " + TargetDirectory + " 不存在!");
15 }
16 //目录结尾
17 if (!TargetDirectory.EndsWith("\\")) { TargetDirectory = TargetDirectory + "\\"; }
18
19 using (ZipInputStream zipfiles = new ZipInputStream(File.OpenRead(ZipFile)))
20 {
21 zipfiles.Password = Password;
22 ZipEntry theEntry;
23
24 while ((theEntry = zipfiles.GetNextEntry()) != null)
25 {
26 string directoryName = "";
27 string pathToZip = "";
28 pathToZip = theEntry.Name;
29
30 if (pathToZip != "")
31 directoryName = Path.GetDirectoryName(pathToZip) + "\\";
32
33 string fileName = Path.GetFileName(pathToZip);
34
35 Directory.CreateDirectory(TargetDirectory + directoryName);
36
37 if (fileName != "")
38 {
39 if ((File.Exists(TargetDirectory + directoryName + fileName) && OverWrite) || (!File.Exists(TargetDirectory + directoryName + fileName)))
40 {
41 using (FileStream streamWriter = File.Create(TargetDirectory + directoryName + fileName))
42 {
43 int size = 2048;
44 byte[] data = new byte[2048];
45 while (true)
46 {
47 size = zipfiles.Read(data, 0, data.Length);
48
49 if (size > 0)
50 streamWriter.Write(data, 0, size);
51 else
52 break;
53 }
54 streamWriter.Close();
55 }
56 }
57 }
58 }
59
60 zipfiles.Close();
61 }
62 }

转载至 http://www.cnblogs.com/yuangang/p/5581391.html

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来源：https://my.oschina.net/8824/blog/3129001

标签

sharpziplib

C# ICSharpCode.SharpZipLib 压缩、解压文件 附源码