首先要引用一下类库：using Ionic.Zip;这个类库可以到网上下载。
下面对类库使用的封装方法：
得到指定的输入流的ZIP压缩流对象
/// <summary> /// 得到指定的输入流的ZIP压缩流对象【原有流对象不会改变】 /// </summary> /// <param name="sourceStream"></param> /// <returns></returns> public static Stream ZipCompress(Stream sourceStream, string entryName = "zip") { MemoryStream compressedStream = new MemoryStream(); if (sourceStream != null) { long sourceOldPosition = 0; try { sourceOldPosition = sourceStream.Position; sourceStream.Position = 0; using (ZipFile zip = new ZipFile()) { zip.AddEntry(entryName, sourceStream); zip.Save(compressedStream); compressedStream.Position = 0; } } catch { } finally { try { sourceStream.Position = sourceOldPosition; } catch { } } } return compressedStream; }
得到指定的字节数组的ZIP解压流对象
/// <summary> /// 得到指定的字节数组的ZIP解压流对象 /// 当前方法仅适用于只有一个压缩文件的压缩包，即方法内只取压缩包中的第一个压缩文件 /// </summary> /// <param name="sourceStream"></param> /// <returns></returns> public static Stream ZipDecompress(byte[] data) { Stream decompressedStream = new MemoryStream(); if (data != null) { try { MemoryStream dataStream = new MemoryStream(data); using (ZipFile zip = ZipFile.Read(dataStream)) { if (zip.Entries.Count > 0) { zip.Entries.First().Extract(decompressedStream); // Extract方法中会操作ms，后续使用时必须先将Stream位置归零，否则会导致后续读取不到任何数据 // 返回该Stream对象之前进行一次位置归零动作 decompressedStream.Position = 0; } } } catch { } } return decompressedStream; }
压缩ZIP文件
/// <summary> /// 压缩ZIP文件 /// 支持多文件和多目录，或是多文件和多目录一起压缩 /// </summary> /// <param name="list">待压缩的文件或目录集合</param> /// <param name="strZipName">压缩后的文件名</param> /// <param name="IsDirStruct">是否按目录结构压缩</param> /// <returns>成功：true/失败：false</returns> public static bool CompressMulti(List<string> list, string strZipName, bool IsDirStruct) { try { using (ZipFile zip = new ZipFile(Encoding.Default))//设置编码，解决压缩文件时中文乱码 { foreach (string path in list) { string fileName = Path.GetFileName(path);//取目录名称 //如果是目录 if (Directory.Exists(path)) { if (IsDirStruct)//按目录结构压缩 { zip.AddDirectory(path, fileName); } else//目录下的文件都压缩到Zip的根目录 { zip.AddDirectory(path); } } if (File.Exists(path))//如果是文件 { zip.AddFile(path,"imges"); } } zip.Save(strZipName);//压缩 return true; } } catch (Exception) { return false; } }
解压ZIP文件
/// <summary> /// 解压ZIP文件 /// </summary> /// <param name="strZipPath">待解压的ZIP文件</param> /// <param name="strUnZipPath">解压的目录</param> /// <param name="overWrite">是否覆盖</param> /// <returns>成功：true/失败：false</returns> public static bool Decompression(string strZipPath, string strUnZipPath, bool overWrite) { try { ReadOptions options = new ReadOptions(); options.Encoding = Encoding.Default;//设置编码，解决解压文件时中文乱码 using (ZipFile zip = ZipFile.Read(strZipPath, options)) { foreach (ZipEntry entry in zip) { if (string.IsNullOrEmpty(strUnZipPath)) { strUnZipPath = strZipPath.Split('.').First(); } if (overWrite) { entry.Extract(strUnZipPath, ExtractExistingFileAction.OverwriteSilently);//解压文件，如果已存在就覆盖 } else { entry.Extract(strUnZipPath, ExtractExistingFileAction.DoNotOverwrite);//解压文件，如果已存在不覆盖 } } return true; } } catch (Exception) { return false; } }
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