C#壓縮包中解壓指定文件

使用 SevenZip.SevenZipExtractor.ExtractFile實現

  public static String docxParser(String filename)
        {
            //path to the systems temporary folder
            String tempFolderPath = Path.GetTempPath();

            //set the path of the 7z.dll (it needs to be in the debug folder)
            SevenZipExtractor.SetLibraryPath("7z.dll");

            SevenZipExtractor extractor = new SevenZipExtractor(filename);

            //create a filestream for the file we are going to extract
            FileStream f = new FileStream(tempFolderPath + "document.xml", FileMode.Create);

            //extract the document.xml
            extractor.ExtractFile("word\\document.xml", f);

            //get rid of the object because it is unmanaged
            extractor.Dispose();

            //close the filestream
            f.Close();

            //send document.xml that we extracted from the .docx to the xml parser
            String result = XMLParser.Parser.ParseXMLtoString(tempFolderPath + "document.xml");

            //delete the extracted file from the temp folder
            File.Delete(tempFolderPath + "document.xml");

            return result;
        }

  public TickReader(FileInfo file)
        {
            Serializer = new PbTickSerializer();
            Codec = new QuantBox.Data.Serializer.V2.PbTickCodec();
            _stream = new MemoryStream();
            _originalLength = (int)file.Length;

            // 加載文件，支持7z解壓
            var fileStream = file.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
            {
                try
                {
                    using (var zip = new SevenZipExtractor(fileStream))
                    {
                        zip.ExtractFile(0, _stream);
                        _stream.Seek(0, SeekOrigin.Begin);
                    }
                }
                catch
                {
                    _stream = fileStream;
                    _stream.Seek(0, SeekOrigin.Begin);
                }
            }
        }

 

 

通過無需解壓讀取ZIP壓縮包的方法，尋思者如何可以不解壓直接讀Genesis TGZ文件內容,

通過查找資料，原來可以通過：SharpCompress.dll工具實現此需求，此工具如此NB

 

一.SharpCompress  讀取TGZ小結：

     1.讀取TGZ內容，無法直接直接指定路徑讀取文件，只能通過MoveToNextEntry一個一個往下遍歷查找文件

     2.MoveToNextEntry 遍歷文件，採用的是深度遞歸

     3.區分文件名與文方件夾，無法通過Entry.IsDirectory 區分，識別方法：尾隨 / 斜杆爲文件夾，否則爲文件

 

        例1：讀取TGZ  STEP中有多少個step

 

        private string readTGZ_Dir()
        {
            string line = "";
            string tarFilePath = @"F:\2p00802ya0.tgz";
            string FileName = Path.GetFileNameWithoutExtension(tarFilePath);
            string FindDir = $@"{FileName}/steps/";  //以/斜杆結尾爲文件夾
            using (Stream stream = File.OpenRead(tarFilePath))
            {
                IReader reader = ReaderFactory.Open(stream);
                while (reader.MoveToNextEntry())
                {
                    Match matchresult = Regex.Match(reader.Entry.Key, $@"^{FindDir}([\w\s]+)/$");
                    if (matchresult.Success)
                    {
                        line += matchresult.Groups[1].Value + "  ";
                    }
                }
            }
            return line;
        }

 

    例2：讀取TGZ  指定standard字體內容

 

        private string readTGZ_File()
        {
            string line = "";
            string tarFilePath = @"F:\2p00802ya0.tgz";
            string FileName = Path.GetFileNameWithoutExtension(tarFilePath);
            string FindFile = $@"{FileName}/fonts/standard";
            using (Stream stream = File.OpenRead(tarFilePath))
            {
                IReader reader = ReaderFactory.Open(stream);
                while (reader.MoveToNextEntry())
                {
                    if (reader.Entry.Key == FindFile)
                    {
                        EntryStream st = reader.OpenEntryStream();
                        byte[] byData = new byte[reader.Entry.Size];
                        st.Read(byData, 0, byData.Length);
                        line = System.Text.Encoding.Default.GetString(byData);  //純英文讀取
                         //line = System.Text.Encoding.UTF8.GetString(byData);     //含中文讀取
                        st.Close();
                        break;
                    }
                }
            }
            return line;
        }