WKHTMLtoPDF page number on footer dotnet core

You can use Spire.PDF library to add page numbers to the result PDF.

First, install Spire.PDF via NuGet Package Manager.

Second, refer to the following code to add page numbers.

using Spire.Pdf;
using Spire.Pdf.Graphics;
using System;
using Spire.Pdf.Widget;
using System.Drawing;
using Spire.Pdf.AutomaticFields;
namespace AddPageNumbers
{
class Program
{
static void Main(string[] args)
{
PdfDocument doc = new PdfDocument();
doc.LoadFromFile(@"C:\Users\Administrator\Desktop\sample.pdf");
//set the margins
PdfUnitConvertor unitCvtr = new PdfUnitConvertor();
PdfMargins margin = new PdfMargins();
margin.Top = unitCvtr.ConvertUnits(2.54f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
margin.Bottom = margin.Top;
margin.Left = unitCvtr.ConvertUnits(3.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
margin.Right = margin.Left;
//draw page number
DrawPageNumber(doc.Pages, margin);
//save the file
doc.SaveToFile("AddPageNumbers.pdf", FileFormat.PDF);
}
private static void DrawPageNumber(PdfPageCollection collection, PdfMargins margin)
{
foreach (PdfPageBase page in collection)
{
PdfBrush brush = PdfBrushes.Black;
PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 10f, FontStyle.Bold), true);
PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Left);
int x = Convert.ToInt32(page.Canvas.ClientSize.Width / 2);
int y = Convert.ToInt32(page.Canvas.ClientSize.Height-margin.Bottom);
Rectangle bounds = new Rectangle(x, y, 50, 20);
PdfPageNumberField field = new PdfPageNumberField();
field.Font = font;
field.Brush = brush;
field.StringFormat = format;
field.Bounds = bounds;
field.Draw(page.Canvas);
}
}
}
}

For more information, visit this link:

https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Page-Setting/How-to-Add-Page-Numbers-to-Existing-PDF-Document-in-C.html

1 Reply

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Leon D5y ago
You can use Spire.PDF library to add page numbers to the result PDF.

First, install Spire.PDF via NuGet Package Manager.

Second, refer to the following code to add page numbers.
using Spire.Pdf;
using Spire.Pdf.Graphics;
using System;
using Spire.Pdf.Widget;
using System.Drawing;
using Spire.Pdf.AutomaticFields;

namespace AddPageNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile(@"C:\Users\Administrator\Desktop\sample.pdf");
            //set the margins
            PdfUnitConvertor unitCvtr = new PdfUnitConvertor();
            PdfMargins margin = new PdfMargins();
            margin.Top = unitCvtr.ConvertUnits(2.54f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Bottom = margin.Top;
            margin.Left = unitCvtr.ConvertUnits(3.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Right = margin.Left;
            //draw page number
            DrawPageNumber(doc.Pages, margin);
            //save the file
            doc.SaveToFile("AddPageNumbers.pdf", FileFormat.PDF);
        }
        private static void DrawPageNumber(PdfPageCollection collection, PdfMargins margin)
        {
            foreach (PdfPageBase page in collection)
            {
                PdfBrush brush = PdfBrushes.Black;
                PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", 10f, FontStyle.Bold), true);
                PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Left);
                int x = Convert.ToInt32(page.Canvas.ClientSize.Width / 2);
                int y = Convert.ToInt32(page.Canvas.ClientSize.Height-margin.Bottom);
                Rectangle bounds = new Rectangle(x, y, 50, 20);
                PdfPageNumberField field = new PdfPageNumberField();
                field.Font = font;
                field.Brush = brush;
                field.StringFormat = format;
                field.Bounds = bounds;
                field.Draw(page.Canvas);
            }
        }
    }
}
For more information, visit this link:
https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Page-Setting/How-to-Add-Page-Numbers-to-Existing-PDF-Document-in-C.html