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How to insert page number in existing PDF document in WinForms?

1 min read

Please refer to the following code example to insert the page number in existing .NET PDF document using the PdfCompositeField class.

C#

//Load the existing PDF document
PdfLoadedDocument loadedDoc = new PdfLoadedDocument("input.pdf");
 
//Set the font.
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 12f);
 
//Create page number field.
PdfPageNumberField pageNumber = new PdfPageNumberField(font, PdfBrushes.Black);
 
//Create page count field.
PdfPageCountField count = new PdfPageCountField(font, PdfBrushes.Black);
 
//Add the fields in composite fields.
PdfCompositeField compositeField = new PdfCompositeField(font, PdfBrushes.Black, "Page {0} of {1}", pageNumber, count);
 
for (int i = 0; i < loadedDoc.Pages.Count; i++)
{
//Draw the composite field.
compositeField.Draw(loadedDoc.Pages[i].Graphics, new PointF(loadedDoc.Pages[i].Size.Width / 2 - 20, loadedDoc.Pages[i].Size.Height - 20));
}
 
//Save the document.
loadedDoc.Save("Output.pdf");
 
//Close the document.
loadedDoc.Close(true);

 

Sample Link:


Conclusion

I hope you enjoyed learning about how to insert page number in existing PDF document in WinForms.

You can refer to our WinForms PDF feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WinForms PDF example to understand how to create and manipulate data.

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