Image lost from header when converting docX to PDF using Spire.doc library - pdf

Question

I have created a docX using the docX library and have added an image in the header. However when I convert the docX to PDF using the Spire.doc library, the image is lost. Any idea why? Below is my code:
var doc = DocX.Create(fileName);
string url = #"C:\Users\Desktop\Capture.JPG";
Novacode.Image img = doc.AddImage(url);
Picture pic = img.CreatePicture();
doc.AddHeaders();
Header header_default = doc.Headers.odd;
Paragraph p1 = header_default.InsertParagraph();
p1.Append(headerText).Bold().Color(System.Drawing.Color.LightGray).FontSize(20);
p1.AppendPicture(pic);
doc.Save();
Document docS = new Document();
docS.LoadFromFile(fileName);
string pdfPath = #"C:\Users\Documents\toPDF.PDF";
docS.SaveToFile(pdfPath, FileFormat.PDF);

Answer 1

As you already use Spire.Doc in your code, why not use spire to create header in Word directly and then save the file to PDF file format. I tried following code and it works fine.
using Spire.Doc;
using System.Drawing;
using Spire.Doc.Documents;
namespace Doc2Pdf
{
class Program
{
static void Main(string[] args)
{
Document doc = new Document();
Section section = doc.AddSection();
HeaderFooter header = section.HeadersFooters.Header;
Paragraph p1 = header.AddParagraph();
Image image = Image.FromFile("pic.png");
p1.AppendPicture(image);
doc.SaveToFile("Header.pdf", FileFormat.PDF);
}
}
}