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C# 压缩和解压文件(SharpZipLib)
先从网上下载ICSharpCode.SharpZipLib.dll类库
将文件或文件夹压缩为zip,函数如下
1 /// <summary> 2 /// 压缩文件 3 /// </summary> 4 /// <param name="fileName">压缩文件路径</param> 5 /// <param name="zipName">压缩的文件名称</param> 6 /// <param name="error">返回的错误信息</param> 7 /// <returns></returns> 8 public bool FileToZip(string fileName, string zipName, out string error) 9 {10 error = string.Empty;11 try12 {13 ZipOutputStream s = new ZipOutputStream(File.Create(zipName));14 s.SetLevel(6); // 0 - store only to 9 - means best compression15 zip(fileName, s);16 s.Finish();17 s.Close();18 return true;19 }20 catch (Exception ex)21 {22 error = ex.Message;23 return false;24 }25 }26 27 28 private void zip(string fileName, ZipOutputStream s)29 {30 if (fileName[fileName.Length - 1] != Path.DirectorySeparatorChar)31 fileName += Path.DirectorySeparatorChar;32 Crc32 crc = new Crc32();33 string[] filenames = Directory.GetFileSystemEntries(fileName);34 foreach (string file in filenames)35 {36 if (Directory.Exists(file))37 {38 zip(file, s);39 }40 else // 否则直接压缩文件41 {42 //打开压缩文件43 FileStream fs = File.OpenRead(file);44 45 byte[] buffer = new byte[fs.Length];46 fs.Read(buffer, 0, buffer.Length);47 string tempfile = Path.GetFileName(file);48 ZipEntry entry = new ZipEntry(tempfile);49 50 entry.DateTime = DateTime.Now;51 entry.Size = fs.Length;52 fs.Close();53 crc.Reset();54 crc.Update(buffer);55 entry.Crc = crc.Value;56 s.PutNextEntry(entry);57 58 s.Write(buffer, 0, buffer.Length);59 }60 }61 }
将zip解压为文件或文件夹,函数代码如下
1 /// <summary> 2 /// 解压文件 3 /// </summary> 4 /// <param name="zipName">解压文件路径</param> 5 /// <param name="fileDirName">解压到文件夹的名称</param> 6 /// <param name="error">返回的错误信息</param> 7 /// <returns></returns> 8 public bool ZipToFile(string zipName, string fileDirName, out string error) 9 {10 try11 {12 error = string.Empty;13 //读取压缩文件(zip文件),准备解压缩14 ZipInputStream s = new ZipInputStream(File.Open(zipName.Trim(), FileMode.Open, FileAccess.Read));15 ZipEntry theEntry;16 17 string rootDir = " ";18 while ((theEntry = s.GetNextEntry()) != null)19 {20 string path = fileDirName;21 //获取该文件在zip中目录22 rootDir = Path.GetDirectoryName(theEntry.Name);23 //获取文件名称24 string fileName = Path.GetFileName(theEntry.Name);25 if (string.IsNullOrEmpty(fileName))26 continue;27 //判断是否为顶层文件,是,将文件直接放在fileDirName下,否,创建目录28 if (string.IsNullOrEmpty(rootDir))29 {30 if (!Directory.Exists(path))31 Directory.CreateDirectory(path);32 }33 else34 {35 path += "\\" + rootDir;36 if (!Directory.Exists(path))37 Directory.CreateDirectory(path);38 }39 40 //将文件流写入对应目录下的文件中41 if (fileName != String.Empty)42 {43 FileStream streamWriter = File.Create(path + "\\" + fileName);44 45 int size = 2048;46 byte[] data = http://www.mamicode.com/new byte[2048];47 while (true)48 {49 if (theEntry.Size == 0)50 break;51 52 size = s.Read(data, 0, data.Length);53 if (size > 0)54 {55 streamWriter.Write(data, 0, size);56 }57 else58 {59 break;60 }61 }62 streamWriter.Close();63 }64 }65 s.Close();66 return true;67 }68 catch (Exception ex)69 {70 error = ex.Message;71 return false;72 }73 }
调用示例
1 string error;2 if (FileToZip(@"E:\文档", "文档.zip", out error))3 MessageBox.Show("Succee");4 else5 MessageBox.Show(error);
1 string error;2 if (ZipToFile(@"E:\文档.zip", "文档", out error))3 MessageBox.Show("Succee");4 else5 MessageBox.Show(error);
C# 压缩和解压文件(SharpZipLib)
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