Add other signature to document

[Jordi Burgas]

Hi,

This is my scenario,

Hi received one pdf document signed digitally via mail and i would like to sign this document - múltiple signature scenario. It is posible?

Your examples show how to sign múltiple at same time in memory  - generate new document and seqüentialy you add two fields of signature,

but i need to sign one document signed and saved to disk previously as Workflow Signature scenario.

Thanks in advance,

Jordi

[Chinnu Muniyappan]

Hi Jordi, 

Thank you for contacting Syncfusion support. 

Yes, we can add multiple signatures in existing PDF document by using PdfCertificate and PdfSignature instance.  We have created a simple sample for signing existing signed PDF document for your reference.  Please refer the below code snippet and sample for more details. 

            //Load the existing PDF document 

            PdfLoadedDocument ldoc = new PdfLoadedDocument("../../input.pdf"); 

 

            //Creates PDF Certificate. 

            PdfCertificate pdfCert = new PdfCertificate(@"../../PDF.pfx", "syncfusion"); 

 

            //Create a new PDF signature field. 

            PdfSignature signature = new PdfSignature(ldoc, ldoc.Pages[0], pdfCert, "cert"); 

            

            //Set the signature bounds 

            signature.Bounds = new System.Drawing.RectangleF(0, 200, 100, 100);            

 

            //Save the PDF document 

            ldoc.Save("output.pdf"); 

 

            //Close the PDF document 

            ldoc.Close(true); 

Sample link: http://www.syncfusion.com/downloads/support/forum/132060/ze/PDFSample-1539150668  

Note: If the PDF document is already signed then the signed certificate must allow the document to perform form fill, signing and commenting, otherwise the existing signature was failed. 

Please let us know if you have any concern. 

Regards, 

Chinnu 

[Jordi Burgas]

Hi Chinnu,

Perfect! this is the right example!

Is it possible to sign the document even though the first user has not allowed signnin?

In our case we want to sign all the external documents we receive to authenticate them

Thanks!

Jordi

Ver traducción original

[Chinnu Muniyappan]

Hi Jordi, 

 

Thank you for your update, 

 

Yes, we can sign the existing signed PDF document even though the first user has not allowed to sign, but the first user signed signature status is getting invalid. Please refer the below screenshot for more details. 

 

 

Please let us know if you have any concern. 

 

Regards, 

Chinnu 

[Jordi Burgas]

Hi Chinnu,

This is perfect ! thanks  for your support and for your great, great syncfusions products.

best regards,

Jordi

[Chinnu Muniyappan]

Hi Jordi, 

 

Thank you for your kind words. 

 

Regards, 

Chinnu