ICSharpCode.SharpZipLib.Zip 解析时报错System.NotSupportedException: No data is available for encoding 936

分析原因

利用ICSharpCode.SharpZipLib.Zip进行APK解析时，因为APK内编译的名称为中文，查询微软开发文档936为gb2312中文编码

​​ 微软开发文档地址

https://docs.microsoft.com/zh-cn/windows/win32/intl/code-page-identifiers​​

错误代码

using (ZipInputStream zip = new ZipInputStream(File.OpenRead(path))) 
{
  using (var filestream = new FileStream(path, FileMode.Open, FileAccess.Read)) 
  {
     
        // 出现错误部分
    ZipFile zipfile = new ZipFile(filestream);
    foreach (ZipEntry entry in zipfile) 
    {
      if (entry != null) 
      {
        if (entry.Name.ToLower() == "androidmanifest.xml") 
        {
          manifestData = new byte[50 * 1024];
          Stream strm = zipfile.GetInputStream(entry);
          strm.Read(manifestData, 0, manifestData.Length);
        }
        if (entry.Name.ToLower() == "resources.arsc") 
        {
          Stream strm = zipfile.GetInputStream(entry);
          using (BinaryReader s = new BinaryReader(strm)) 
          {
            resourcesData = s.ReadBytes((int)entry.Size);
          }
        }
      }
    }
  }
}

解决方法

using (ZipInputStream zip = new ZipInputStream(File.OpenRead(path))) 
{
  using (var filestream = new FileStream(path, FileMode.Open, FileAccess.Read)) 
  {
        // 在.Net Core中默认System.Text中不支持CodePagesEncodingProvider.Instance
        // 添加下方这行代码允许访问.Net Framework平台上不支持的编码提供程序
     System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
    ZipFile zipfile = new ZipFile(filestream);
    foreach (ZipEntry entry in zipfile) 
    {
      if (entry != null) 
      {
        if (entry.Name.ToLower() == "androidmanifest.xml") 
        {
          manifestData = new byte[50 * 1024];
          Stream strm = zipfile.GetInputStream(entry);
          strm.Read(manifestData, 0, manifestData.Length);
        }
        if (entry.Name.ToLower() == "resources.arsc") 
        {
          Stream strm = zipfile.GetInputStream(entry);
          using (BinaryReader s = new BinaryReader(strm)) 
          {
            resourcesData = s.ReadBytes((int)entry.Size);
          }
        }
      }
    }
  }
}