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!");
        }
    }
}

More resources

Advanced Usage Topics

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

GitHub Examples 

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

Free Online App 

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.