ICSharpCode.SharpZipLib压缩方法不支持PKZIP

Question

我在使用2000年的Windows版本4的旧PKZIP®命令行创建的zip文件时遇到问题。我正在使用ICSharpCode.SharpZipLib解压该文件。Windows在资源管理器中打开该文件没有问题。代码如下：

private void Extract(string zipFile, string outputfolder)
{
  try
  {
    _logger.InfoFormat("Extracting {0}", zipFile);
    System.IO.Stream stream = new System.IO.FileStream(zipFile, System.IO.FileMode.Open);
    ZipInputStream zipInputStream = new ZipInputStream(stream);
    ZipEntry zipEntry = zipInputStream.GetNextEntry(); //Throws Compression error exception
    while (zipEntry != null)
    {
      String entryFileName = zipEntry.Name;
      _logger.InfoFormat("Entry-Filename: {0}", entryFileName);

      byte[] buffer = new byte[4096];
      String fullZipToPath = Path.Combine(outputfolder, entryFileName);
      string directoryName = Path.GetDirectoryName(fullZipToPath);
      if (directoryName.Length > 0)
      {
        Directory.CreateDirectory(directoryName);
      }

      using (FileStream streamWriter = File.Create(fullZipToPath))
      {
        StreamUtils.Copy(zipInputStream, streamWriter, buffer);
      }
      zipEntry = zipInputStream.GetNextEntry();
    }
  }
  catch (Exception ex)
  {
    _logger.Error("Error during extraction",ex);
    throw;
  }
}

你知道怎么解决这个问题吗？

Answer 1

我在解压一个用7-zip压缩的zip文件时也遇到了同样的问题。

我把它从Deflate64改成了Deflate，然后它就起作用了。

​

​