Get Signatures

[[email protected]]

Hey,

i use your solution to add signature fields (and some others fields) on pdf.
And, i use a pdf viewer solution (not yours) to sign with hand on tablet.
After signed, i do some treatments with spire, but i would to know which signature field is signed or always empty but i dont find anything to know that.

Can you help me please ?

Thank you

[Annika.Zhou]

Hello,

Thank you for your inquiry.
Is the handwritten signature you mentioned similar to the signature using Adobe's tool "Fill & Sign"? If so, the signature in this way actually exists as a picture in the PDF file, and the content structure of the signature field will not be modified, so it is impossible to judge whether the signature field is signed or not. If you signed with a certificate file, like this tutorial:https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/PDF-Protection-Create-Digital-Signature-in -PDF-with-C-VB.NET.html, please use the following code to determine whether the signature field is signed.

Code: Select all

PdfDocument pdf = new PdfDocument();
pdf.LoadFromFile(inputFile);
var form = (PdfFormWidget)pdf.Form;
for (int i = 0; i < form.FieldsWidget.Count; ++i)
{
    PdfSignatureFieldWidget field = form.FieldsWidget[i] as PdfSignatureFieldWidget;
    if (field.Signature == null)
    {
        Console.WriteLine(field.Name + " is empty");
    }
    else
    {
        Console.WriteLine(field.Name + " is signed");
    }           
}

If the above methods do not meet your requirements, please provide your signed PDF file for further investigation. You could attach it here or send it to us via email ([email protected]). Thanks in advance.

Sincerely,
Annika
E-iceblue support team