Update Barcode signatures in document

GroupDocs.Signature provides BarcodeSignature class to manipulate barcode 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 Barcode signature in the document with GroupDocs.Signature:

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

// initialize Signature instance
using (Signature signature = new Signature("sampleSigned.pdf"))
{
    BarcodeSearchOptions options = new BarcodeSearchOptions();
    List<BarcodeSignature> signatures = signature.Search<BarcodeSignature>(options);
    if (signatures.Count > 0)
    {
        BarcodeSignature barcodeSignature = signatures[0];
        // change position
        barcodeSignature.Left = 100;
        barcodeSignature.Top = 100;
        bool result = signature.Update(barcodeSignature);
        if (result)
        {
            Console.WriteLine($"Signature with Barcode '{barcodeSignature.Text}' was updated!");
        }
        else
        {
            Console.WriteLine($"Signature was not updated in the document!");
        }
    }
}

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 generate barcodes and/or sign your files with barcodes for free, you can use the Barcode Generator online app.

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