Delete Signatures of the certain type Leave feedback
On this page
GroupDocs.Signature provides overloaded Delete method that accepts one SignatureType or list of them. Please be aware that this method modifies the same document that was passed to constructor of the Signature class.
Here are the steps to delete signature by specific type from the document with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path or its stream as a constructor parameter;
- Call Signature object Delete method and pass certain SignatureType enumeration to it.
This example shows how to delete QR-Code signatures from the document.
const filePath = Constants.SAMPLE_SIGNED_MULTI;
const fileName = path.basename(filePath);
const outputDirectory = path.join(Constants.OutputPath, 'DeleteBySignatureType');
if (!fs.existsSync(outputDirectory)) {
fs.mkdirSync(outputDirectory, { recursive: true });
}
// Copy source file since the delete method works with the same Document
const outputFilePath = path.join(outputDirectory, fileName);
// fs.copyFileSync(filePath, outputFilePath);
// Processing QR-Code signatures
const signature = new signatureLib.Signature(filePath);
// Deleting QR-Code signatures from the document
const result = await signature.delete(outputFilePath, signatureLib.SignatureType.QrCode);
if (result.getSucceeded().size() > 0) {
console.log('Following QR-Code signatures were deleted:');
let number = 1;
result.getSucceeded().toArray().forEach((o) => {
const temp = o;
console.log(`Signature #${number++}: Type: ${temp.getSignatureType()}, Id: ${temp.getSignatureId()}, Text: ${temp.getText()}`);
});
} else {
console.log('No QR-Code signatures were deleted.');
}
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 sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
Was this page helpful?
Any additional feedback you'd like to share with us?
Please tell us how we can improve this page.
Thank you for your feedback!
We value your opinion. Your feedback will help us improve our documentation.
