We are pleased to announce another monthly release of GroupDocs.Signature for .NET. This latest release 18.11 of the API comes up with a multitude of new features like the ability to add form-field signatures in PDF documents and many more. We therefore recommend you to download the new version of the API to evaluate the exciting new features and enhance your document e-signing experience.
Features
Sign PDF Document with a Form-Field Signature
The Form-Field Signatures are the input control which are placed in a document page. Following example demonstrates how to add Checkbox in a PDF document:// instantiate check-box form field signature
FormFieldSignature checkboxSignature = new PdfCheckboxFormFieldSignature("FieldCheckbox", true);
// instantiate options based on check-box form field signature
PdfFormFieldSignOptions checkboxOptions = new PdfFormFieldSignOptions(checkboxSignature)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Margin = new Padding(120, 20, 0, 0),
Height = 10,
Width = 10
};
// sign document
string signedPath = handler.Sign("02_pages.pdf", checkboxOptions,
new SaveOptions { OutputType = OutputType.String, OutputFileName = "Pdf_FormFields" });
Search Form-Field Signatures in a PDF Document
API allows you to search for Form-Field Signatures like Text, Checkbox or Digital within the document. Following example demonstrates how to search Form-Field Signature in PDF document:// setup search options
PdfSearchFormFieldOptions searchOptions = new PdfSearchFormFieldOptions();
searchOptions.SearchAllPages = true;
searchOptions.NamePattern = @"Field";
searchOptions.Value = @"Value1";
// search document
SearchResult result = handler.Search("Pdf_FormFields_Signed.pdf", searchOptions);
Metadata Signatures for Slides document
The Metadata Signature is the additional document property that contains special attributes/tags to keep non visual information inside the document. Following example demonstrates how to compose Metadata Signature options for Slides document:// setup options with text of signature
SlidesMetadataSignOptions signOptions = new SlidesMetadataSignOptions();
// Specify different Metadata Signatures and add them to options sigature collection
// setup Author property
SlidesMetadataSignature mdSign_Author = new SlidesMetadataSignature("Author", "Mr.Scherlock Holmes");
signOptions.MetadataSignatures.Add(mdSign_Author);
// setup data of document id
SlidesMetadataSignature mdSign_DocId = new SlidesMetadataSignature("DocumentId", Guid.NewGuid().ToString());
signOptions.MetadataSignatures.Add(mdSign_DocId);
// setup data of sign date
SlidesMetadataSignature mdSign_Date = new SlidesMetadataSignature("SignDate", DateTime.Now);
signOptions.MetadataSignatures.Add(mdSign_Date);
// setup some integer value
SlidesMetadataSignature mdSign_Days = new SlidesMetadataSignature("DocDays", 12345);
signOptions.MetadataSignatures.Add(mdSign_Days);
// setup data of sign date
SlidesMetadataSignature mdSign_Koeff = new SlidesMetadataSignature("SignKoeff", 2.345M);
signOptions.MetadataSignatures.Add(mdSign_Koeff);
// sign document
string signedPath = handler.Sign("test.pptx", signOptions,
new SaveOptions { OutputType = OutputType.String, OutputFileName = "Slides_Documents_Metadata" });
Search Metadata Signature in a Slides document
You can search for Metadata Signatures within the Slides document. Following example demonstrates how to search Metadata Signatures in Slides document:// setup search options
SlidesSearchMetadataOptions searchOptions = new SlidesSearchMetadataOptions();
// set if we need built-in signatures
searchOptions.IncludeBuiltinProperties = true;
// search document
SearchResult result = handler.Search("SignedMetadata.pptx", searchOptions);
Additional Verification Criteria
This latest version of the API provides few additional properties to verify Digital Signatures of Words document.// setup digital verification options
WordsVerifyDigitalOptions verifyOptions = new WordsVerifyDigitalOptions("SherlockHolmes.cer");
verifyOptions.Comments = "Test1";
verifyOptions.SubjectName = "Signature";
verifyOptions.IssuerName = "GroupDocs";
verifyOptions.SignDateTimeFrom = new DateTime(2017, 1, 26, 14, 55, 57);
verifyOptions.SignDateTimeTo = new DateTime(2017, 1, 26, 14, 55, 59);
//verify document
VerificationResult result = handler.Verify("digital signatures.docx", verifyOptions);
Available Channels and Resources
Here are a few channels and resources for you to learn, try and get technical support on GroupDocs.Signature API for .NET:- NuGet – Nuget install
- Documentation – Product Docs
- API References – Signature API References
- Examples – Examples, Showcases and Plugins
- Product Support Forum – Technical Support Forum for GroupDocs.Signature
- Video Tutorials – YouTube Video Tutorials
