Merge pull request #552 from telerik/new-kb-create-pdf-with-empty-signature-field-radpdfprocessing-d7a5d3952f1d4138b4a93177f6528974

Added new kb article create-pdf-with-empty-signature-field-radpdfprocessing

Author: YoanKar

knowledge-base/create-pdf-with-empty-signature-field-radpdfprocessing.md

@@ -0,0 +1,74 @@
+---
+title: Creating a PDF Document with an Empty Signature Field Using RadPdfProcessing 
+description: Learn how to create a PDF document with an empty signature field using the PdfProcessing library of the Document Processing Libraries.
+type: how-to
+page_title: How to Add an Empty Signature Field to a PDF Document in RadPdfProcessing
+slug: create-pdf-with-empty-signature-field-radpdfprocessing
+tags: pdfprocessing, document, processing, pdf, signature, field, empty, unsigned
+res_type: kb
+ticketid: 1687482
+---
+
+## Environment
+
+| Version | Product | Author | 
+| ---- | ---- | ---- | 
+| 2025.1.205| RadPdfProcessing |[Desislava Yordanova](https://www.telerik.com/blogs/author/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.
+
+![UnSigned PDF](images/unsigned-pdf.png) 
+
+## Solution
+
+To create a PDF document with an empty [signature field]({%slug radpdfprocessing-model-interactive-forms-form-fields-signaturefield%}) using [RadPdfProcessing]({%slug radpdfprocessing-overview%}), follow these steps:
+
+1. Create a new PDF document and add a page.
+2. Define the rectangle area for the [signature field]({%slug radpdfprocessing-model-interactive-forms-form-fields-signaturefield%}).
+3. Create a signature field with a unique name.
+4. Add a [widget]({%slug radpdfprocessing-model-annotations-widgets%}) to the signature field and set its size and position.
+5. Add the widget to the page's annotations.
+6. Save the document to a file.
+
+Here is the complete code snippet:
+
+```csharp
+// 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.
+
+## See Also
+
+- [Digital Signature]({%slug radpdfprocessing-features-digital-signature%})
+- [Signature Field]({%slug radpdfprocessing-model-interactive-forms-form-fields-signaturefield%})
+- [Signing an Unsigned PDF Document that Contains a Signature Field with RadPdfProcessing]({%slug pdfprocessing-sign-an-unsigned-pdf%})

knowledge-base/images/unsigned-pdf.png

@@ -128,3 +128,4 @@ Remember to adjust the file paths, certificate details, and specific document re
 - [RadPdfProcessing]({%slug radpdfprocessing-overview%})
 - [Form Fields concept in RadPdfProcessing]({%slug radpdfprocessing-model-interactive-forms-form-fields%})
 - [Digital Signature in RadPdfProcessing]({%slug radpdfprocessing-features-digital-signature%})
+- [Creating a PDF Document with an Empty Signature Field Using RadPdfProcessing]({%slug create-pdf-with-empty-signature-field-radpdfprocessing%})