How to add image as background in PDF document using C# and VB.NET?
The Syncfusion Essential® PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can add an image as background in a PDF document using C# and VB.NET.
Steps to add an image as background in a PDF document:
- Create a new console application project.
- Install the Syncfusion.Pdf.Winforms NuGet package as a reference to your .NET Framework application from Nuget.org.
- Include the following namespaces in the Program.cs file.
C#
using Syncfusion.Pdf; using Syncfusion.Pdf.Graphics;
VB.NET
Imports Syncfusion.Pdf Imports Syncfusion.Pdf.Graphics
- Use the following code sample to add an image as background in a PDF document.
C#
//Create a document
PdfDocument doc = new PdfDocument();
//Add a new page
PdfPage page = doc.Pages.Add();
//Load a bitmap
PdfBitmap image = new PdfBitmap("Ani.gif");
//Save the current graphics state
PdfGraphicsState state = page.Graphics.Save();
//Apply transparency
page.Graphics.SetTransparency(0.2f);
//Draw image
page.Graphics.DrawImage(image, new PointF(0,0), new SizeF(page.GetClientSize().Width, page.GetClientSize().Height));
//Restore the graphics state
page.Graphics.Restore(state);
//Draw font
PdfFont font = new PdfStandardFont(PdfFontFamily.TimesRoman, 20, PdfFontStyle.Bold);
//Draw string
page.Graphics.DrawString("Hello World!!!", font, PdfBrushes.Brown, new PointF(0, 0));
//Save and close the PDF document
doc.Save("Output.pdf");
doc.Close(true);
//This will open the PDF file and the result will be seen in default PDF viewer
Process.Start("Output.pdf");
VB.NET
'Create a document
Dim doc As PdfDocument = New PdfDocument()
'Add a new page
Dim page As PdfPage = doc.Pages.Add()
'Load a bitmap
Dim image As PdfBitmap = New PdfBitmap("Ani.gif")
'Save the current graphics state
Dim state As PdfGraphicsState = page.Graphics.Save()
'Apply transparency
page.Graphics.SetTransparency(0.2F)
'Draw image
page.Graphics.DrawImage(image, New PointF(0, 0), New SizeF(page.GetClientSize().Width, page.GetClientSize().Height))
'Restore the graphics state
page.Graphics.Restore(state)
'Draw font
Dim font As PdfFont = New PdfStandardFont(PdfFontFamily.TimesRoman, 20, PdfFontStyle.Bold)
'Draw string
page.Graphics.DrawString("Hello World!!!", font, PdfBrushes.Brown, New PointF(0, 0))
'Save and close the PDF document
doc.Save("Output.pdf")
doc.Close(True)
Process.Start("Output.pdf")
A complete working sample can be download from CreatePDFSample.zip.
By executing the program, you will get the PDF document as follows,
Take a moment to peruse the documentation. You can find other options like inserting images in a new and existing PDF document, vector image, image masking, and replacing images in an existing PDF, image pagination, and multi-page TIFF to PDF.
Refer here to explore a rich set of Syncfusion Essential® PDF features.
Starting with v16.2.0.x, if you reference Syncfusion® assemblies from the trial setup or the NuGet feed, include a license key in your projects. Refer to the link to learn about generating and registering the Syncfusion® license key in your application to use the components without a trial message.
See Also:
Insert image into PDF using Xamarin
Insert image in PDF table cell
Add watermark to PDF document with the opaque image
Conclusion:
I hope you enjoyed learning about how to add image as background in PDF document using C# and VB.NET.
You can refer to our Flutter PDF feature tour page to learn about its other groundbreaking features and documentation, and how to quickly get started with configuration specifications. You can also explore our Flutter PDF Flutter PDF examples to understand how to create and manipulate data.
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