eSign Presentation with Metadata signature

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

 Here are the steps to add metadata signatures into Presentation document with GroupDocs.Signature:

How to eSign Presentation with Metadata signature

This example shows how to add Metadata signature to Presentation document.

Signature signature = new Signature("sample.ppsx");
// setup options with text of signature
MetadataSignOptions options = new MetadataSignOptions();

// Create few Presentation Metadata signatures
PresentationMetadataSignature[] signatures = new PresentationMetadataSignature[]
                new PresentationMetadataSignature("Author", "Mr.Scherlock Holmes"),
                new PresentationMetadataSignature("DateCreated", new Date()),
                new PresentationMetadataSignature("DocumentId", 123456),
                new PresentationMetadataSignature("SignatureId", 123.456)

// sign document to file
signature.sign("SampleSigned.ppsx", options);

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.