Creating a Cropped PDF from an Existing PDF Page Using RadPdfProcessing

Updated over 6 months ago

Environment

Version	Product	Author
2024.2.426	RadPdfProcessing	Desislava Yordanova

Description

When working with PDF documents, you might encounter scenarios where you need to extract and crop a specific page to create a new PDF document. This article demonstrates how to use RadPdfProcessing to crop a page from an existing PDF and save the cropped content as a new PDF document.

Solution

To create a new PDF document from a cropped page of an existing PDF, follow these steps:

1. Extract the desired page from the original PDF document. Use the PdfFileSource class to access the pages of the original PDF.

2. Create a new PDF document with the extracted page. Utilize the PdfStreamWriter class to write the extracted page into a new PDF document.

3. Crop the content of the newly created PDF. Modify the CropBox of the RadFixedPage to specify the cropped area.

4. Export the cropped document as a new PDF file.

Here's a complete code snippet illustrating the process:

csharp

        private static void CreateCroppedPagePDF()
        {
            string originalFilePath = @"WinForms PdfViewer.pdf";
            int pageIndex = 3;
            string outputPageFilePath = @"..\..\page3.pdf";
            File.Delete(outputPageFilePath);
            using (PdfFileSource fileToSplit = new PdfFileSource(File.OpenRead(originalFilePath)))
            {
                PdfPageSource page = fileToSplit.Pages[pageIndex];

                using (PdfStreamWriter fileWriter = new PdfStreamWriter(File.OpenWrite(outputPageFilePath)))
                {
                    fileWriter.WritePage(page);
                }
            }
            PdfFormatProvider provider = new PdfFormatProvider();
            RadFixedDocument croppedDocument = provider.Import(File.ReadAllBytes(outputPageFilePath));
            Rect middleRectangle = new Rect(0, croppedDocument.Pages.First().Size.Height / 3, croppedDocument.Pages.First().Size.Width, croppedDocument.Pages.First().Size.Height / 3);
            foreach (RadFixedPage page in croppedDocument.Pages)
            {
                page.CropBox = middleRectangle;
            }
            File.WriteAllBytes(outputPageFilePath, provider.Export(croppedDocument));
            Process.Start(new ProcessStartInfo() { FileName = outputPageFilePath, UseShellExecute = true });
        }

This code snippet demonstrates how to create a new PDF by cropping the center third of a specific page from an existing PDF document. The observed result is illustrated below:

See Also

• RadPdfProcessing Documentation
• PdfStreamWriter
• Telerik Document Processing SDK Repository
• Cropping PDF Pages and Saving as Images Using RadPdfProcessing

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