Insert a background image to PDF file in WPF

Usually, when you open a PDF document, the blank background looks a little drab. You might want to create background for your PDF document to make them more visually appealing through the using of a background image.

In the following sections, I will demonstrate how to insert PDF background image in WPF.

Here is the original PDF document without background image.

The code snippets are as followed:

Step 1: Initialize a new instance of PdfDocument class and load the PDF document from the file.

PdfDocument doc = new PdfDocument();
doc.LoadFromFile("To a Skylark.pdf");

Step 2: In this example, we choose the first page of PDF file to insert the background image.

PdfPageBase page = doc.Pages[0];

Step 3: Load the image from file and set it as background image.

System.Drawing.Image backgroundImage = System.Drawing.Image.FromFile("Sky.jpg");
page.BackgroundImage = backgroundImage;

Step 4: Save the PDF document and launch the file.

doc.SaveToFile("With Background Image.pdf");
System.Diagnostics.Process.Start("With Background Image.pdf");

Effective screenshot:

Insert a background image to PDF file in WPF

Full Codes:

[C#]

using System.Windows;
using Spire.Pdf;

namespace Poetic_Works
{
    /// 
    /// Interaction logic for MainWindow.xaml
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile("To a Skylark.pdf");
            PdfPageBase page = doc.Pages[0];
            System.Drawing.Image backgroundImage = System.Drawing.Image.FromFile("Sky.jpg");
            page.BackgroundImage = backgroundImage;
            doc.SaveToFile("With Background Image.pdf");
            System.Diagnostics.Process.Start("With Background Image.pdf");
        }
    }
}

[VB.NET]

Imports System.Windows
Imports Spire.Pdf

Namespace Poetic_Works
	''' 
	''' Interaction logic for MainWindow.xaml
	''' 
	Public Partial Class MainWindow
		Inherits Window
		Public Sub New()
			InitializeComponent()
		End Sub

		Private Sub button2_Click(sender As Object, e As RoutedEventArgs)
			Dim doc As New PdfDocument()
			doc.LoadFromFile("To a Skylark.pdf")
			Dim page As PdfPageBase = doc.Pages(0)

			Dim backgroundImage As System.Drawing.Image = System.Drawing.Image.FromFile("Sky.jpg")
			page.BackgroundImage = backgroundImage
			doc.SaveToFile("With Background Image.pdf")
			System.Diagnostics.Process.Start("With Background Image.pdf")
		End Sub
	End Class
End Namespace

Insert a background image to PDF file in WPF

See Also