ich möchte über ein TIFF dass ich vorher in einen MemoryStream lade OCR drüber laufen lassen.
Dazu nehme ich eine Abwandlung von 2 Methoden die ich dazu nutze um mir eine PDF in ein TIFF zu exportieren.
Das klappt super --> auch ohne den Generic GDI+ Fehler.
Das sind die Original Methoden:
List<MemoryStream> inMS;
private void SaveAsImages(string path)
{
inMS = new List<MemoryStream>();
try
{
System.Drawing.Image image = null;
for (var i = 0; i < Renderer.PageCount; i++)
{
var size = Renderer.Document.PageSizes[i];
image = Renderer.Document.Render(i, (int)size.Width , (int)size.Height, 300, 300, false);
MemoryStream ms = new MemoryStream();
image.Save(ms, ImageFormat.Tiff);
inMS.Add(ms);
}
SaveAsMultiPageTiff(path, inMS);
}
catch (Exception ex)
{
Cts.Cancel();
Debug.Fail(ex.Message);
}
}
private void SaveAsMultiPageTiff(string sOutFile, List<MemoryStream> inMS)
{
Mouse.OverrideCursor = Cursors.Wait;
System.Drawing.Imaging.Encoder encoder = System.Drawing.Imaging.Encoder.SaveFlag;
ImageCodecInfo encoderInfo = ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff");
EncoderParameters encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.MultiFrame);
Bitmap firstImage = null;
try
{
using (MemoryStream ms = new MemoryStream())
{
System.Drawing.Image.FromStream(inMS.First()).Save(ms, ImageFormat.Tiff);
firstImage = (Bitmap)System.Drawing.Image.FromStream(ms1);
firstImage.Save(sOutFile, encoderInfo, encoderParameters);
}
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
Bitmap imagePage;
for (int i = 1; i < inMS.Count; i++)
{
using (MemoryStream ms = new MemoryStream())
{
System.Drawing.Image.FromStream(inMS[i]).Save(ms, ImageFormat.Tiff);
imagePage = (Bitmap)System.Drawing.Image.FromStream(ms1);
firstImage.SaveAdd(imagePage, encoderParameters); //throws Generic GDI+ error if the memory streams are not open when this is called
}
}
}
catch (Exception)
{
throw;
}
finally
{
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.Flush);
firstImage.SaveAdd(encoderParameters);
MessageBox.Show("Dokument wurde erfolgreich nach " + sOutFile + " exportiert.", "Dokument export...", MessageBoxButton.OK);
Mouse.OverrideCursor = Cursors.Arrow;
}
}
Ich habe die an den markierten Stellen angepasst --> wo der Fehler auftritt schreibe ich mal in großen Lettern mit dabei:
List<MemoryStream> inMS;
private void SaveAsImages(string path)
{
inMS = new List<MemoryStream>();
PdfiumViewer.PdfRenderer Renderer = new PdfiumViewer.PdfRenderer();
try
{
Renderer.OpenPdf(path);
System.Drawing.Image image = null;
for (var i = 0; i < Renderer.PageCount; i++)
{
var size = Renderer.Document.PageSizes[i];
image = Renderer.Document.Render(i, (int)size.Width, (int)size.Height, 300, 300, false);
MemoryStream ms = new MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Tiff);
inMS.Add(ms);
}
SaveAsMultiPageTiff(path, inMS);
}
catch (Exception ex)
{
}
}
private void SaveAsMultiPageTiff(string sOutFile, List<MemoryStream> inMS)
{
Mouse.OverrideCursor = Cursors.Wait;
System.Drawing.Imaging.Encoder encoder = System.Drawing.Imaging.Encoder.SaveFlag;
ImageCodecInfo encoderInfo = ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff");
EncoderParameters encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.MultiFrame);
Bitmap firstImage = null;
try
{
using (MemoryStream ms1 = new MemoryStream())
{
System.Drawing.Image.FromStream(inMS.First()).Save(ms1, System.Drawing.Imaging.ImageFormat.Tiff);
firstImage = (Bitmap)System.Drawing.Image.FromStream(ms1);
MemoryStream ms2 = new MemoryStream();
firstImage.Save(ms2, encoderInfo, encoderParameters); //throws Generic GDI+ error if the memory streams are not open when this is called
}
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
Bitmap imagePage = null;
for (int i = 1; i < inMS.Count; i++)
{
using (MemoryStream ms1 = new MemoryStream())
{
System.Drawing.Image.FromStream(inMS[i]).Save(ms1, System.Drawing.Imaging.ImageFormat.Tiff);
imagePage = (Bitmap)System.Drawing.Image.FromStream(ms1);
firstImage.SaveAdd(imagePage, encoderParameters); //throws Generic GDI+ error if the memory streams are not open when this is called
}
}
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.Flush);
firstImage.SaveAdd(encoderParameters);
ÄNDERUNGEN AB HIER
var img = firstImage.Clone();
firstImage.Dispose();
using (MemoryStream ms = new MemoryStream())
{
((Bitmap)img).Save(ms, ((Bitmap)img).RawFormat); ==> UND HIER KNALLT ES
DoOCR(ms.ToArray());
}
ÄNDERUNGEN BIS HIER
}
catch (Exception ex)
{
//ensure the errors are not missed while allowing for flush in finally block so files dont get locked up.
throw;
}
finally
{
// Close out the file
Mouse.OverrideCursor = Cursors.Arrow;
}
}
Als Fehler bekomme ich folgendes:
| Fehler |
| A generic error occurred in GDI+. |
| Fehler |
|
bei System.Drawing.Image.Save(Stream stream, ImageCodecInfo encoder, EncoderParameters encoderParams) bei System.Drawing.Image.Save(Stream stream, ImageFormat format) bei DoSSuiteV2.Models.DMSModel.SaveAsMultiPageTiff(String sOutFile, List`1 inMS) in ... |
Ich weiß leider nicht mehr weiter - hat jemand eine Idee für diese mehr oder weniger nichts-sagende Meldung?
