How to Crop WinForms PDF Page 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 crop a PDF page using C# and VB.NET.
Steps to crop a PDF page programmatically:
- Create a new C# 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 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.Parsing Imports Syncfusion.Pdf.Graphics Imports System.Drawing
- Use the following code snippet to crop the page in a PDF document.
C#
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// 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 height from inches
float inches = 3.5f;
float height = inches * 72;
// Set the document margin and height
document.PageSettings.Height = height;
// Add the page to the 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));
// Save the new document
document.Save("CroppedDocument.pdf");
// Close the documents
loadedDocument.Close(true);
document.Close(true);
// This will open the PDF file so the result will be seen in the default PDF Viewer
System.Diagnostics.Process.Start("CroppedDocument.pdf");VB.NET
' Load the existing PDF document
Dim loadedDocument As New PdfLoadedDocument("Input.pdf")
' 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 New PdfDocument()
' Calculate 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
' Add the page to the new PDF document
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
document.Save("CroppedDocument.pdf")
' Close the documents
loadedDocument.Close(True)
document.Close(True)
' This will open the PDF file so the result will be seen in the default PDF Viewer
System.Diagnostics.Process.Start("CroppedDocument.pdf")A complete working sample can be downloaded from PDFCropSample.zip.
By executing the program, you will get the PDF document as follows: 
Take a moment to peruse the documentation for working with pages, where you can find options like rotating a PDF page and splitting a PDF file into individual pages with code examples.
Refer here to explore the rich set of Syncfusion Essential® PDF features.
Starting with v16.2.0.x, if you reference Syncfusion® assemblies from a trial setup or from 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.
Conclusion
I hope you enjoyed learning about how to crop WinForms PDF pages using C# and VB.NET.
You can refer to our WinForms 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 WinForms PDF examples to understand how to create and manipulate data.
For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion®, you can try our 30-day free trial to check out our other controls.
If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums or feedback portal. We are always happy to assist you!
