How to superimpose PDF pages using C# and VB.NET?
Syncfusion Essential PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can superimpose PDF pages using C# and VB.NET.
Steps to superimpose PDF pages programmatically:
- Create a new C# console application project.
- Install the Syncfusion.Pdf.WinForms NuGet package as 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; using Syncfusion.Pdf.Parsing; using System.Drawing;
VB.NET
Imports Syncfusion.Pdf Imports Syncfusion.Pdf.Graphics Imports Syncfusion.Pdf.Parsing Imports System.Drawing
- Use the following code snippet to superimpose the PDF pages.
C#
//Load the PDF documents
PdfLoadedDocument ldDoc1 = new PdfLoadedDocument("BorderTemplate.pdf");
PdfLoadedDocument ldDoc2 = new PdfLoadedDocument("SourceTemplate.pdf");
//Create the new PDF document
PdfDocument doc = new PdfDocument();
for (int i = 0, count = ldDoc2.Pages.Count; i < count; ++i)
{
//Add a new page to the document
PdfPage page = doc.Pages.Add();
//Create the graphics
PdfGraphics g = page.Graphics;
//Load the page from loaded document
PdfPageBase lpage = ldDoc2.Pages[i];
//Create template
PdfTemplate template = lpage.CreateTemplate();
g.DrawPdfTemplate(template, PointF.Empty, page.GetClientSize());
//Load the page from loaded document
lpage = ldDoc1.Pages[0];
//Create template
template = lpage.CreateTemplate();
//Draw template
g.DrawPdfTemplate(template, PointF.Empty, page.GetClientSize());
}
//Save the document
doc.Save("SuperimposePDF.pdf");
//Close the documents
ldDoc1.Close(true);
ldDoc2.Close(true);
doc.Close(true);
//This will open the PDF file so, the result will be seen in default PDF viewer
Process.Start("SuperimposePDF.pdf");
VB.NET
'Load the PDF documents
Dim ldDoc1 As PdfLoadedDocument = New PdfLoadedDocument("BorderTemplate.pdf")
Dim ldDoc2 As PdfLoadedDocument = New PdfLoadedDocument("SourceTemplate.pdf")
'Create the new PDF document
Dim doc As PdfDocument = New PdfDocument()
Dim i As Integer = 0, count As Integer = ldDoc2.Pages.Count
While i < count
'Add a new page to the document
Dim page As PdfPage = doc.Pages.Add()
'Create the graphics
Dim g As PdfGraphics = page.Graphics
'Load the page from loaded document
Dim lpage As PdfPageBase = ldDoc2.Pages(i)
'Create template
Dim template As PdfTemplate = lpage.CreateTemplate()
g.DrawPdfTemplate(template, PointF.Empty, page.GetClientSize())
'Load the page from loaded document
lpage = ldDoc1.Pages(0)
'Create template
template = lpage.CreateTemplate()
'Draw template
g.DrawPdfTemplate(template, PointF.Empty, page.GetClientSize())
i += 1
End While
'Save the document
doc.Save("SuperimposePDF.pdf")
'Save the documents
doc.Close(True)
ldDoc1.Close(True)
ldDoc2.Close(True)
'This will open the PDF file so, the result will be seen in default PDF viewer
Process.Start("SuperimposePDF.pdf")
A complete working sample can be downloaded from SuperimposePDFSample.zip.
Take a moment to peruse the documentation, where you can find other options like rearranging pages from an existing PDF document, rotating a PDF page, inserting pages in a document, changing the page numbers in a PDF document with code examples.
Refer here to explore the rich set of Syncfusion Essential PDF features.
An online sample link to overlay two different documents into a single PDF document.
Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.
