Edit PDFDocument and View Changes

#1 Posted : Wednesday, August 21, 2019 1:32:37 PM(UTC)

hasmyr

Groups: Registered
Posts: 2

I am trying to load a PDFDocument from a PDF, then edit that PDF and save the edited PDF to my machine.

For my example I have a PDF that has 1 page and some text on it, I see the text in the PDFDocument as Page Objects.

I want to delete all text from the PDF and save it, just to demonstrate that I can edit a PDF and save the result .

Code:


var path = new DirectoryInfo(Path.Combine("..|StaticFiles|TestPDF.pdf".Split('|')));

var pdfDocument = new PDFDocument(path.ToString());

var firstPage = pdfDocument.Pages.Select(e => e.PageNumber).Min();
var lastPage = pdfDocument.Pages.Select(e => e.PageNumber).Max();

pdfDocument.ParsePages(PDFParsePagesOptions.All, firstPage, lastPage);

foreach (var page in pdfDocument.Pages)
{
	page.Objects.Clear();
}

var path2 = new DirectoryInfo(Path.Combine("..|StaticFiles|TestPDF1.pdf".Split('|')));
if (System.IO.File.Exists(path2.ToString()))
{
	// So we won't append to it twice 
	System.IO.File.Delete(path2.ToString());
}

using (RasterCodecs codecs = new RasterCodecs())
{
	// For each page... 
	for (int i = 1; i <= pdfDocument.Pages.Count; i++)
	{
		// Get the page as a raster image 
		using (RasterImage image = pdfDocument.GetPageImage(codecs, i))
		{
			// Save it to the destination file 
			codecs.Save(image, path2.ToString(), RasterImageFormat.RasPdf, 24, 1, 1, -1, CodecsSavePageMode.Append);
		}
	}
}

This code will save the PDF in the selected location, but the pdf is not altered. How can I edit the PDFDocument and Save its result?

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Edit PDFDocument and View Changes - Edit PDFDocument and View Changes