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:

Create new instance of Signature class and pass source document path as a constructor parameter;
Instantiate BarcodeSearchOptions object with desired properties;
Call Search method to obtain list of BarcodeSignatures;
Select from list BarcodeSignature object(s) that should be updated;
Call Signature object Update method and pass one or several signatures to it.

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 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.

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