/// <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;
}
