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Merge two document pages into a new single page

Product Version Product Author
2021.2.614 RadPdfProcessing Martin Velikov


This article describes how to import two PDF documents and merge their first pages into a new single page.


The following example demonstrates how to use the PdfStreamWriter in order to import and merge the first pages of two different documents into a new single page.


string firstDocument = "SampleDocument1.pdf"; 
string secondDocument = "SampleDocument2.pdf"; 
string exportedPdf = "Merged.pdf"; 
if (File.Exists(exportedPdf)) 
using (FileStream fileStream = File.OpenWrite(exportedPdf)) 
    using (PdfStreamWriter fileWriter = new PdfStreamWriter(fileStream)) 
        using (PdfFileSource firstDocumentToMerge = new PdfFileSource(File.OpenRead(firstDocument))) 
        using (PdfFileSource secondDocumentToMerge = new PdfFileSource(File.OpenRead(secondDocument))) 
            PdfPageSource firstDocumentPageToMerge = firstDocumentToMerge.Pages[0]; 
            PdfPageSource secondDocumentPageToMerge = secondDocumentToMerge.Pages[0]; 
            double largestPageHeight = Math.Max(firstDocumentPageToMerge.Size.Height, secondDocumentPageToMerge.Size.Height); 
            Size size = new Size(firstDocumentPageToMerge.Size.Width + secondDocumentPageToMerge.Size.Width, largestPageHeight); 
            using (PdfPageStreamWriter newPage = fileWriter.BeginPage(size)) 
                double offsetX = newPage.PageSize.Width / 2; 
                newPage.ContentPosition.Translate(offsetX, 0); 
More information you can find in the PdfPageStreamWriter, PdfFileSource, and PdfPageSource help articles.
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