Read multiple pdf attachments from Email & save all attachments as single pdf file

Question

I am able to save single attachments using below code

var mimePart = (attachment as MimePart);

using (var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
    mimePart.ContentObject.DecodeTo(fileStream);
}

Here each attachment is saved as separate file, But I want to save multiple attachments as single pdf file I am not able to find any method for merging in MimePart.

score 1 · Answer 1 · answered Sep 21 '21 at 11:13

I recently had this exact requirement. To merge Pdf-files I used PdfSharp:

using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;

public static void MergePDFS(string target, 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 < pdfDoc.PageCount; i++)
                    targetDoc.AddPage(pdfDoc.Pages[i]);
            }
        }
            targetDoc.Save(target);
        }
    }
}

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Read multiple pdf attachments from Email & save all attachments as single pdf file

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