/// <summary> /// Create a CFStorage using an existing directory (previously loaded). /// </summary> /// <param name="compFile">The Storage Owner - CompoundFile</param> /// <param name="dirEntry">An existing Directory Entry</param> internal ReadonlyCompoundFileStorage(ReadonlyCompoundFile compFile, IDirectoryEntry dirEntry) : base(compFile) { if (dirEntry == null || dirEntry.SID < 0) { throw new CFException("Attempting to create a CFStorage using an unitialized directory"); } this.DirEntry = dirEntry; }
private void MainWindow_Loaded(object sender, RoutedEventArgs e) { var file = new FileInfo("Test.pptx"); var tf = @"F:\temp\KewalnaidiNaborereefal.pptx"; if (File.Exists(tf)) { file = new FileInfo(tf); } long lastAllocatedBytesForCurrentThread; using var presentationDocument = PresentationDocument.Open(file.FullName, false); var slide = presentationDocument.PresentationPart !.SlideParts.First().Slide; var graphicFrame = slide.CommonSlideData !.ShapeTree !.GetFirstChild <GraphicFrame>() !; var graphic = graphicFrame.Graphic !; var graphicData = graphic.GraphicData !; var alternateContent = graphicData.GetFirstChild <AlternateContent>() !; var choice = alternateContent.GetFirstChild <AlternateContentChoice>() !; var oleObject = choice.GetFirstChild <OleObject>() !; Debug.Assert(oleObject.GetFirstChild <OleObjectEmbed>() != null); var id = oleObject.Id !; var part = slide.SlidePart !.GetPartById(id !); Debug.Assert(part.ContentType == "application/vnd.openxmlformats-officedocument.oleObject"); var allocatedBytesForCurrentThread = GC.GetAllocatedBytesForCurrentThread(); var s = part.GetStream(); lastAllocatedBytesForCurrentThread = GC.GetAllocatedBytesForCurrentThread(); Debug.WriteLine($"GetStream {lastAllocatedBytesForCurrentThread - allocatedBytesForCurrentThread}"); allocatedBytesForCurrentThread = lastAllocatedBytesForCurrentThread; var tempFolder = @"F:\temp"; if (!Directory.Exists(tempFolder)) { tempFolder = System.IO.Path.GetTempPath(); } tempFolder = System.IO.Path.Combine(tempFolder, System.IO.Path.GetRandomFileName()); Directory.CreateDirectory(tempFolder); //CompoundFileUnzipper.Unzip(s, tempFolder, byteArrayPool); // 为了性能考虑,不再使用内存方式,全部写入到文件 //var forwardSeekStream = new ForwardSeekStream(s, byteArrayPool); var oleFile = System.IO.Path.Combine(tempFolder, System.IO.Path.GetRandomFileName()); using var oleFileStream = new FileStream(oleFile, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None, bufferSize: 4096, FileOptions.RandomAccess); s.CopyTo(oleFileStream); oleFileStream.Position = 0; //Origin(forwardSeekStream); var cf = new ReadonlyCompoundFile(oleFileStream); lastAllocatedBytesForCurrentThread = GC.GetAllocatedBytesForCurrentThread(); Debug.WriteLine($"CompoundFile {lastAllocatedBytesForCurrentThread - allocatedBytesForCurrentThread}"); allocatedBytesForCurrentThread = lastAllocatedBytesForCurrentThread; var packageStream = cf.RootStorage.GetStream("Package"); lastAllocatedBytesForCurrentThread = GC.GetAllocatedBytesForCurrentThread(); Debug.WriteLine($"GetStream {lastAllocatedBytesForCurrentThread - allocatedBytesForCurrentThread}"); allocatedBytesForCurrentThread = lastAllocatedBytesForCurrentThread; //var tempFolder = @"F:\temp"; //if (!Directory.Exists(tempFolder)) //{ // tempFolder = System.IO.Path.GetTempPath(); //} var xlsxFile = System.IO.Path.Combine(tempFolder, System.IO.Path.GetRandomFileName() + ".xlsx"); using (var fileStream = File.OpenWrite(xlsxFile)) { //fileStream.Write(packageStream.GetData().AsSpan()); cf.CopyTo(packageStream, fileStream); } //var fakeStream = new FakeStream(); //cf.CopyTo(packageStream, fakeStream, byteArrayPool); //using (var fileStream = File.OpenWrite(xlsxFile)) //{ // fileStream.Write(packageStream.GetData().AsSpan()); //} //using var spreadsheetDocument = SpreadsheetDocument.Open(xlsxFile, false); //var sheets = spreadsheetDocument.WorkbookPart!.Workbook.Sheets; lastAllocatedBytesForCurrentThread = GC.GetAllocatedBytesForCurrentThread(); Debug.WriteLine($"CopyTo {lastAllocatedBytesForCurrentThread - allocatedBytesForCurrentThread}"); allocatedBytesForCurrentThread = lastAllocatedBytesForCurrentThread; //// OpenMcdf.CFException:“Cannot load a non-seekable Stream” //var compoundFile = new CompoundFile(part.GetStream(FileMode.Open)); //var oleFile = System.IO.Path.Combine(tempFolder, System.IO.Path.GetRandomFileName()); //using (var fileStream = File.OpenWrite(oleFile)) //{ // using var stream = part.GetStream(FileMode.Open); // stream.CopyTo(fileStream); //} //var compoundFile = new CompoundFile(oleFile); //var packageStream = compoundFile.RootStorage.GetStream("Package"); //var xlsxFile = System.IO.Path.Combine(tempFolder, System.IO.Path.GetRandomFileName() + ".xlsx"); //using (var fileStream = File.OpenWrite(xlsxFile)) //{ // fileStream.Write(packageStream.GetData().AsSpan()); //} using var spreadsheetDocument = SpreadsheetDocument.Open(xlsxFile, false); var sheets = spreadsheetDocument.WorkbookPart !.Workbook.Sheets; }
protected ReadonlyCompoundFileItem(ReadonlyCompoundFile compoundFile) { this.CompoundFile = compoundFile; }