IAC CopyToClipboard worked for years but now fails starting around November 2021 (on Acrobat DC)

[kenneths96185056]

I have used IAC to copy pdf page image to the clipboard.  Here is the code that no longer works (it was working for a long time until a week ago).  The code still works on our old Acrobat XI Pro systems; it fails on Acrobat DC systems.  The exception is always thrown.  Does anyone know what happened or how I can solve the problem?

private Image getImageFromDocPage(CAcroPDPage pdfPage)
{
Image img = null;
CAcroRect pdfRect = new Acrobat.AcroRect(); // the pdf region
CAcroPoint pdfPoint = new Acrobat.AcroPoint(); // the pdf point
pdfPoint = (CAcroPoint)pdfPage.GetSize();
pdfRect.Left = 0;
// Tricky! Faxed documents have a fax 'header' at the top of each page which makes the pages different even though the contents are actually identical!
// A point = 1/72 inch.
short topPortionToIgnoreUnitsPoints = 8;
/*
if (radioButtonIgnoreTop8Points.Checked) { topPortionToIgnoreUnitsPoints = 8; }
if (radioButtonIgnoreTop12Points.Checked) { topPortionToIgnoreUnitsPoints = 12; }
if (radioButtonIgnoreTop18Points.Checked) { topPortionToIgnoreUnitsPoints = 18; }
if (radioButtonIgnoreTop24Points.Checked) { topPortionToIgnoreUnitsPoints = 24; }
if (radioButtonIgnoreTop36Points.Checked) { topPortionToIgnoreUnitsPoints = 36; }
*/

pdfRect.Top = topPortionToIgnoreUnitsPoints;
pdfRect.right = pdfPoint.x;
pdfRect.bottom = pdfPoint.y;
pdfPage.CopyToClipboard(pdfRect, 0, 0, 100);
//Constants.displayInformationMessage("Copied 1st page to clipboard!");
//
IDataObject clipboardData = Clipboard.GetDataObject();
if (clipboardData.GetDataPresent(DataFormats.Bitmap))
{
Bitmap pdfBitmap = (Bitmap)clipboardData.GetData(DataFormats.Bitmap);
img = (Image)pdfBitmap;
}
else
{
throw new Exception("Error. Unable to process image data in the pdf documents.");
}
return img;
}

[BarlaeDC]

Hi

Which operating system and version are you using?

And have you checked that the IDataObject has a bitmap image and not a different image type? (just checking the simple stuff first)

[kenneths96185056]

On Windows 10, Adobe Acrobat DC - fails as stated (even though has worked for a year or more with no code changes.

On Windows 10, Adobe Acrobat XI Pro - works great now and has worked great for a few years.

Here are more complex details.

The Visual Studio code builds the app on an Adobe Acrobat XI Pro environment; thus the added reference for Acrobat.dll is from Acrobat XI Pro.  That app is installed on the Acrobat DC system and , somewhat surprisingly, works great until a week ago.  So, I installed Visual Studio on the Acrobat DC system and rebuilt the app which now references the Acrobat.dll from Acrobat DC.  The rebuilt app fails the same way.

Two things broke a week or two ago (with no changes to my code):

1.  if (clipboardData.GetDataPresent(DataFormats.Bitmap)) is always false

2.  pdDocTarget.Save((short)PDSaveFlags.PDSaveFull, targetFilespec)  <--- always returns false now!!!

Note that other function still work no matter which version of Acrobat is used for builds.  For example, 

int ctrPagesInSource = pdDocSource.GetNumPages(); ,<--- still works

[kenneths96185056]

A third party product provides the function I need using this code with their product.

Their product is not free so I have not purchased the full product yet since I still hope Adobe can fix the bug.

/// <summary>
/// Gets cropped page image.  
/// Cropping to remove a portion of top page is necessary because a FAX header at the top causes identical pages to seem not identical!
        public Image getCroppedImageFromPdfPage(PdfDocument pdfDoc, int pagenum, float numberTopInchesToCrop)
        {
            // Convert page to Image!
            Image wholeImage = pdfDoc.SaveAsImage(pagenum - 1);
            // Remember Pages[0] is page 1; Pages[n-1] is page n
            PdfPageBase page = pdfDoc.Pages[pagenum - 1];
            float wholeImageHeightPixels = wholeImage.Height;
            // Canvas is drawing surface of pdf document page
            // 1 inch = 72 points
            float canvasHeightInches = page.Canvas.Size.Height / 72f;
            // formula:
            float imagePixelsPerInch = wholeImageHeightPixels / canvasHeightInches;

            float numberTopPixelsToCrop = numberTopInchesToCrop * imagePixelsPerInch;
            Bitmap croppedImage = new Bitmap(wholeImage.Width, wholeImage.Height - (int)numberTopPixelsToCrop);
            Graphics graphics = Graphics.FromImage(croppedImage);
            RectangleF sourceRect = new RectangleF(0, (int)numberTopPixelsToCrop, wholeImage.Width, wholeImage.Height - (int)numberTopPixelsToCrop);
            RectangleF destinationRect = new RectangleF(0, 0, wholeImage.Width, wholeImage.Height - (int)numberTopPixelsToCrop);
            graphics.DrawImage(wholeImage, destinationRect, sourceRect, GraphicsUnit.Pixel);
            return (Image)croppedImage;
        }