c#打包文件解压缩的实例

Z时代
2024-01-10
分类：综合

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;
        }
      }