Creating a PDF Document with an Empty Signature Field Using RadPdfProcessing
Environment
| Version | Product | Author |
|---|---|---|
| 2025.1.205 | RadPdfProcessing | Desislava Yordanova |
Description
Learn how to create a PDF document with an empty signature field, which allows signing the document in any PDF viewer. The document should only contain the empty signature field, and when opened in a viewer, it should provide the option to sign.
Solution
To create a PDF document with an empty signature field using RadPdfProcessing, follow these steps:
- Create a new PDF document and add a page.
- Define the rectangle area for the signature field.
- Create a signature field with a unique name.
- Add a widget to the signature field and set its size and position.
- Add the widget to the page's annotations.
- Save the document to a file.
Here is the complete code snippet:
// Create a new PDF document and a page
RadFixedDocument document = new RadFixedDocument();
RadFixedPage page = document.Pages.AddPage();
// Define the rectangle for the signature field
Rect signatureRect = new Rect(50, 700, 200, 50);
// Create the signature field (do not assign a certificate or signature)
SignatureField signatureField = document.AcroForm.FormFields.AddSignature("SignatureFieldUniqueName");
// Add a widget for the signature field and set its position and size
SignatureWidget signatureWidget = signatureField.Widgets.AddWidget();
signatureWidget.Rect = signatureRect;
// Add the widget to the page's annotations
page.Annotations.Add(signatureWidget);
// Save the document
string filePath = "EmptySignatureWidget.pdf";
File.Delete(filePath);
using (var output = new System.IO.FileStream(filePath, System.IO.FileMode.Create, System.IO.FileAccess.Write))
{
new PdfFormatProvider().Export(document, output, TimeSpan.FromSeconds(10));
}
// Open the PDF
Process.Start(new ProcessStartInfo() { FileName = filePath, UseShellExecute = true });
Notes
- The code creates an empty signature field without assigning a certificate or signature.
- The resulting PDF can be opened in any PDF viewer that supports signing, allowing the user to sign the document.