eSign Spreadsheet with Metadata signature Leave feedback

GroupDocs.Signature provides SpreadsheetMetadataSignature class to specify different Metadata signature objects for MetadataSignOptions instance to sign Spreadsheet document files. Spreadsheet document metadata is hidden attributes, some of them are visible only over viewing standard document properties like Author, Creation Date, Producer, Entry, Keywords etc.
Spreadsheet document metadata contains pair of Name and Value, Name should be unique within the document.
Spreadsheet document metadata could keep big amount of data that allows provides ability to keep serialized custom objects with additional encryption in there.

• Create new instance of Signature class and pass source document path as a constructor parameter.
• Instantiate the MetadataSignOptions object according to your requirements.
• Instantiate one or several SpreadsheetMetadataSignature objects and add them into MetadataSignOptions to metadata signatures collection (Signatures) via Add or AddRange method.
• Call Sign method of Signature class instance and pass MetadataSignOptions to it.

This example shows how to add Metadata e-signature to a Spreadsheet document.

import groupdocs.signature as signature
from groupdocs.signature.options import MetadataSignOptions
from groupdocs.signature.domain import SpreadsheetMetadataSignature
from datetime import datetime

# Initialize signature
with signature.Signature("sample.xlsx") as sign:
    # Create metadata options
    options = MetadataSignOptions()
    
    # Create few Spreadsheet Metadata signatures
    signatures = [
        SpreadsheetMetadataSignature("Author", "Mr.Scherlock Holmes"),
        SpreadsheetMetadataSignature("DateCreated", datetime.now()),
        SpreadsheetMetadataSignature("DocumentId", 123456),
        SpreadsheetMetadataSignature("SignatureId", 123.456)
    ]
    
    # Add signatures to options
    options.signatures.extend(signatures)
    
    # Sign document
    sign.sign("SampleSigned.xlsx", options)

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

• GroupDocs.Signature for Python via .NET examples, plugins, and showcase

Along with the full-featured Python 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.