How to copy content from existing PDF to new PDF using C# in WinForms PDF?

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The Syncfusion Essential® PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can copy the content from an existing PDF document to the middle page of a new PDF document using C# and VB.NET in Winforms PDF feature tour page.

Steps to copy the content from an existing PDF document to the middle page of a new PDF document programmatically:

Create a new Windows Forms application project.

Create a new Windows Forms application

Install the Syncfusion.Pdf.WinForms NuGet package as a reference to your .NET Framework application from NuGet.org.

NuGet package reference

Include the following namespaces in the Form1.cs file.

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

Add the following code to copy the content from an existing PDF document to the middle page of a new PDF document.

string file = "../../Data/input.pdf";
 
//Crop an existing PDF document
MemoryStream croppedStream = CropPDF(file);
 
//Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(croppedStream);
 
//Load the page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
 
//Create the template from the page
PdfTemplate template = loadedPage.CreateTemplate();
 
//Create a new PDF document
PdfDocument document = new PdfDocument();
 
//Add a page to the document
PdfPage page = document.Pages.Add();
 
//Create PDF graphics for the page
PdfGraphics graphics = page.Graphics;
 
//Draw the template
graphics.DrawPdfTemplate(template, new PointF(0, page.GetClientSize().Height / 2), new SizeF(page.GetClientSize().Width, page.GetClientSize().Height / 2));
 
//Save the document
document.Save("Output.pdf");
 
//Close the document
document.Close(true);
 
//This will open the PDF file and the result will be seen in the default PDF Viewer
Process.Start("Output.pdf");

Helper methods:

private MemoryStream CropPDF(string file)
{
    //Load the existing PDF document
    PdfLoadedDocument loadedDocument = new PdfLoadedDocument(file);
 
    //Load the page
    PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
 
    //Create the template from the page
    PdfTemplate template = loadedPage.CreateTemplate();
 
    //Create a new PDF document
    PdfDocument document = new PdfDocument();
 
    //Calculate the height from inches
    float inches = 3.5f;
    float height = inches * 72;
 
    //Set the document margin and height
    document.PageSettings.Height = height;
    document.PageSettings.Margins.All = 0;
 
    //Add the page to new PDF document
    PdfPage page = document.Pages.Add();
 
    //Create the graphics
    PdfGraphics graphics = page.Graphics;
 
    //Draw the template
    graphics.DrawPdfTemplate(template, new PointF(0, 0)); 
 
    MemoryStream stream = new MemoryStream();
    //Save the new document
    document.Save(stream);
 
    //Close the documents
    loadedDocument.Close(true);
    document.Close(true);
 
    return stream;
}

VB.NET

Dim file As String = "../../Data/input.pdf"
 
'Crop an existing PDF document 
Dim croppedStream As MemoryStream = CropPDF(file)
 
'Load the existing PDF document 
Dim loadedDocument As PdfLoadedDocument = New PdfLoadedDocument(croppedStream)
 
'Load the page 
Dim loadedPage As PdfLoadedPage = TryCast(loadedDocument.Pages(0), PdfLoadedPage)
 
'Create the template from the page 
Dim template As PdfTemplate = loadedPage.CreateTemplate()
 
'Create a new PDF document 
Dim document As PdfDocument = New PdfDocument()
 
'Add a page to the document
Dim page As PdfPage = document.Pages.Add()
 
'Create PDF graphics for the page
Dim graphics As PdfGraphics = page.Graphics
 
'Draw the template
graphics.DrawPdfTemplate(template, New PointF(0, page.GetClientSize().Height / 2), New SizeF(page.GetClientSize().Width, page.GetClientSize().Height / 2))
 
'Save the document
document.Save("Output.pdf")
 
'Close the document
document.Close(True)
 
'This will open the PDF file and the result will be seen in the default PDF Viewer
Process.Start("Output.pdf")

Helper methods:

Private Function CropPDF(ByVal file As String) As MemoryStream
 
    'Load the existing PDF document
    Dim loadedDocument As PdfLoadedDocument = New PdfLoadedDocument(file)
 
    'Load the page
    Dim loadedPage As PdfLoadedPage = TryCast(loadedDocument.Pages(0), PdfLoadedPage)
 
    'Create the template from the page
    Dim template As PdfTemplate = loadedPage.CreateTemplate()
 
    'Create a new PDF document
    Dim document As PdfDocument = New PdfDocument()
 
    'Calculate the height from inches
    Dim inches As Single = 3.5F
    Dim height As Single = inches * 72
 
    'Set the document margin and height
    document.PageSettings.Height = height
    document.PageSettings.Margins.All = 0
 
    'Add the page to new PDF docment 
    Dim page As PdfPage = document.Pages.Add()
 
    'Create the graphics
    Dim graphics As PdfGraphics = page.Graphics
 
    'Draw the template
    graphics.DrawPdfTemplate(template, New PointF(0, 0))
 
    'Save the new document
    Dim stream As MemoryStream = New MemoryStream()
    document.Save(stream)
 
    'Close the documents
    loadedDocument.Close(True)
    document.Close(True)
 
    Return stream
 
End Function

A complete working sample can be download from CopyContentSample.zip.

By executing the program, you will get the output document as follows,

Output document screenshot

Take a moment to peruse the documentation. You can find other options like creating a new PDF template, creating templates from an existing PDF document, and creating document overlays.

Refer to this link to explore a rich set of Syncfusion Essential® PDF features.

Note:

Starting with v16.2.0.x, if you reference Syncfusion® assemblies from trial setup or the NuGet feed, include a license key in your product. Refer to this link to learn about generating and registering the Syncfusion® license key in your application to use the components without trail message.

How to copy content from existing PDF to new PDF using C# in WinForms PDF?

Steps to copy the content from an existing PDF document to the middle page of a new PDF document programmatically:

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