Adding Timestamp Server URL to Signatures in PDF (.NET Core/Framework)

How to Add Timestamp Server URL to PDF in C#

Below are the steps and sample code to add Timestamp Server URL to stamp the signatures in PDF document using the Generator product.

Steps for Adding Timestamp Server URL to a PDF Document

1. Create a Document object.
2. Create a Page object and set the PageSize to Letter in its constructor.
3. Create a Signature object and set its properties.
4. Add Signature to the Page instance.
5. Add the Page instance to the Document instance.
6. Create a Certificate object and set the properties.
7. Create a TimestampServer object and set the properties.
8. Sign the document with the signature field, certificate and the timestamp object.
9. Save the PDF document.

Sample Code - C#

Document document = new Document();
Page page = new Page(PageSize.Letter);
            
Signature signature = new Signature("SigField", 10, 10, 250, 100); 
page.Elements.Add(signature); 
document.Pages.Add(page); 
Certificate certificate = new Certificate(@"JohnDoe.pfx", "password"); 

// Create TimestampServer
TimestampServer timestampServer = new TimestampServer("Url of the Timestamp Server");
document.Sign("SigField", certificate, timestampServer);
            
document.Draw(@"Output.pdf");        

Using Timestamp Server URL from Certificate in C#

The following steps and sample code illustrate adding a certificates that has the Timestamp Server URL to PDF document using DynamicPDF Core Suite.

Steps for Adding Timestamp Server URL from Certificate to a PDF Document

1. Create a Document object.
2. Create a Page object.
3. Create a Signature object and set its properties.
4. Add Signature to the Page instance.
5. Add the Page instance to the Document instance.
6. Create a Certificate object with certificate which has the timestamp server URL in it.
7. Sign the document with the signature field, certificate and boolean true.
8. Save the PDF document.

Sample Code - C#

Document document = new Document();
Page page = new Page(PageSize.Letter);
            
Signature signature = new Signature("SigField", 10, 10, 250, 100); 
page.Elements.Add(signature); 
document.Pages.Add(page); 
Certificate certificate = new Certificate(@"JohnDoe.pfx", "password"); 
document.Sign("SigField", certificate, true);
            
document.Draw(@"Output.pdf");        

Getting Started

NuGet Package

DynamicPDF Core Suite is available on NuGet and is part of the ceTe.DynamicPDF.CoreSuite.NET package. The easiest way to install the package is through the Visual Studio Package Manager. You can also download the package directly from NuGet.

DynamicPDF Core Suite Information

More information can be found on the DynamicPDF Core Suite webpage.

• DynamicPDF Core Suite for .NET

Available on Other Platforms

DynamicPDF Core Suite is available for the Java and COM/ActiveX platforms. Refer to the respective product pages for more details.

• Java - DynamicPDF Generator for Java
• COM/ActiveX - DynamicPDF Generator for COM/ActiveX