c#打包文件解压缩的实例

/// <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;      }

/// <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;      }

/// <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;        }      }

/// <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;        }      }