C# code -Compare 2 pdf and give output as 2 pdfs with color

Question

I have 2 pdf files pdf1 and pdf 2.I want to compare both pdf and should give result as 2 pdf outputs. The 2 output pdf ,the changes should be highlighted in some color.say for output 1 -red color and output 2 pdf-green color for the change Eg: input pdf 1 - text is :- I am anoop input pdf 2 - text is :- I am aneesh so the output should be as follows: output pdf 3: I am anoop output pdf 3: I am aneesh means text anoop is changed to aneesh.So anoop in red color and aneesh in green color. Please provide the c# code for this.

Satya Karki · Answer

You use use following code with PDFSharp. using (PdfDocument one = PdfReader.Open( "file1.pdf" , PdfDocumentOpenMode.Import)) using (PdfDocument two = PdfReader.Open( "file2.pdf" , PdfDocumentOpenMode.Import)) using (PdfDocument outPdf = new PdfDocument()) { CopyPages(one, outPdf); CopyPages(two, outPdf); outPdf.Save( "file1and2.pdf" ); } void CopyPages(PdfDocument from, PdfDocument to) { for ( int i = 0; i { to.AddPage(from.Pages[i]); } }

Rijwan Ansari · Answer

You can try this as well. using PdfSharp; using PdfSharp.Pdf; using PdfSharp.Pdf.IO; public static void MergePDFs( string targetPath, params string [] pdfs) { using (var targetDoc = new PdfDocument()){ foreach (var pdf in pdfs) { using (var pdfDoc = PdfReader.Open(pdf, PdfDocumentOpenMode.Import)) { for (var i = 0; i targetDoc.AddPage(pdfDoc.Pages[i]); } } targetDoc.Save(targetPath); } } params string[] pdfs is array of multiple pdfs path. Regards Rijwan

Rijwan Ansari · Answer

Hi, check this article. https://www.c-sharpcorner.com/article/merge-pdf/

Marvin Reid · Answer

You can find the differences of text from two PDFs using the CompareText method in the DocumentComparer class of the LEADTOOLS SDK. Once you compare the two, the TextDifference object can be used to get access to the DifferenceOperation enumeration which will allow you to find the changes made between the two files. You can try building on the following code for this: var doc1 = DocumentFactory.LoadFromFile(@ "D:\compare-original.pdf" , new LoadDocumentOptions()); var doc2 = DocumentFactory.LoadFromFile(@ "D:\compare-modified.pdf" , new LoadDocumentOptions()); var textList = new List () { doc1.Pages.First().GetText(), doc2.Pages.First().GetText() }; var comparer = new DocumentComparer(); var diffs = comparer.CompareText(textList); foreach (TextDifference diff in diffs) { diff.Operation = DifferenceOperation.Insert; Console.WriteLine($ "Operations: {diff.Operation}" ); Console.WriteLine($ "Text: {diff.Text}" ); Console.WriteLine( "--------" ); } https://www.leadtools.com/help/sdk/v21/dh/dc/documentcomparer-comparetext.html https://www.leadtools.com/help/sdk/v21/dh/dc/textdifference.html

Leon D · Answer

Comparing PDFs is not an easy task, but you can try Spire.PDF for .NET library to extract text from PDFs and then compare the output. https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/How-to-Extract-Text-from-PDF-Document-with-C-/VB.NET.html

YaminiKumar Boyapati · Answer

May be we can use iTextSharp working around on PDF's