Update Barcode signatures in document Leave feedback
GroupDocs.Signature provides the BarcodeSignature class to manipulate barcode signatures’ location, size, and textual content. Please be aware that the Update method modifies the same document that was passed to the constructor of the Signature class.
- Create a new instance of the Signature class and pass the source document path as a constructor parameter.
- Instantiate the BarcodeSearchOptions object with the desired properties.
- Call the Search method to obtain a list of BarcodeSignatures.
- Select from the list the BarcodeSignature object(s) that should be updated.
- Call the Signature object’s Update method and pass one or several signatures to it.
This example shows how to update Barcode signature that was found using Search method.
// The path to the documents directory.
const filePath = Constants.SAMPLE_PDF_SIGNED;
const fileName = path.basename(filePath);
// Copy source file since the update method works with the same document
const outputFilePath = path.join(Constants.OutputPath, 'UpdateBarcode', fileName);
const dir = path.dirname(outputFilePath);
if (!fs.existsSync(dir)) {
fs.mkdirSync(dir, { recursive: true });
}
// Initialize Signature instance
const signature = new signatureLib.Signature(filePath);
// Initialize BarcodeSearchOptions
const options = new signatureLib.BarcodeSearchOptions();
// Search for barcode signatures in the document
const signatures = signature.search(signatureLib.BarcodeSignature.class, options).toArray();
if (signatures.length > 0) {
const barcodeSignature = signatures[0];
barcodeSignature.setLeft(100);
barcodeSignature.setTop(100);
// Update the barcode signature in the document
const result = signature.update(outputFilePath, barcodeSignature);
if (result) {
console.log(`\nSignature with Barcode '${barcodeSignature.getText()}' and encode type '${barcodeSignature.getEncodeType().getTypeName()}' was updated in the document ['${fileName}'].`);
} else {
console.log(`\nSignature was not updated in the document! Signature with Barcode '${barcodeSignature.getText()}' and encode type '${barcodeSignature.getEncodeType().getTypeName()}' was not found!`);
}
}
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Signature for .NET examples, plugins, and showcase
- GroupDocs.Signature for Java examples, plugins, and showcase
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
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.
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