Update Text signatures in document

GroupDocs.Signature provides TextSignature class to manipulate text signatures location, size and textual content.
Please be aware that Update method modifies the same document that was passed to constructor of Signature class.

Here are the steps to update Text signature in the document with GroupDocs.Signature:

This example shows how to update Text signature that was found using  Search method.

using (Signature signature = new Signature("sampleSigned.pdf"))
    TextSearchOptions options = new TextSearchOptions();
    // search for text signatures in document
    List<TextSignature> signatures = signature.Search<TextSignature>(options);
    if(signatures.Count > 0)
        TextSignature textSignature = signatures[0];
        // change Text property
        textSignature.Text = "John Walkman";
        // change position
        textSignature.Left = textSignature.Left + 10;
        textSignature.Top = textSignature.Top + 10;
        // change size. Please note not all documents support changing signature size
        textSignature.Width = 200;
        textSignature.Height = 100;
        bool result = signature.Update(textSignature);
            Console.WriteLine($"Signature with Text '{textSignature.Text}' was updated in the document ['{fileName}'].");
            Console.WriteLine($"Signature was not updated in  the document! Signature with Text '{textSignature.Text}' was not found!");

Advanced Usage Topics

To learn more about document eSign features, please refer to the advanced usage section.

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online Apps

Along with the full-featured .NET library, we provide simple but powerful free online apps.

To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.