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This page contains release notes for GroupDocs.Signature for .NET 19.1

Major Features

There are few new features, improvements and bug fixes in this regular release. Most features are related to introduced Image Metadata signatures support, improvement on Image Metadata Signature data type conversion, same as some bug fixes. Summary the most notable changes are:

  • Introduced Metadata Signature Singing features for Image Documents
  • Added support of rounded corners for Stamp inner lines
  • Fixed Barcode and QR-code singing with wide borders for better recognition
  • Improved signatures options detection

Full List of Issues Covering all Changes in this Release

Issue Type
SIGNATURENET-1856Fix Stamp generation processing for wide areasBug
SIGNATURENET-1851 QR/Bar code with wide border cannot be readBug
SIGNATURENET-1786Implement Rounded corners for Rectangle Stamp Signature TypesNew Feature
SIGNATURENET-1719Implement Metadata Signature features for Image DocumentsNew Feature
SIGNATURENET-1871 Improve Image Metadata type conversionImprovement
SIGNATURENET-1858 Optimize Document options type detection for handler processes (Sign/Verify/Search)Improvement

Public API and Backward Incompatible Changes

This section lists public API changes that were introduced in GroupDocs.Signature for .NET 19.1. It includes not only new and obsoleted public methods, but also a description of any changes in the behavior behind the scenes in GroupDocs.Signature which may affect existing code. Any behavior introduced that could be seen as a regression and modifies existing behavior is especially important and is documented here.

  1. New public class ImageMetadataSignatureOptions was added to support Metadata signatures for Image DocumentsImage Metadata signatures are based on Exchangeable image file format (Exif) specification. The Exif data references are specified standard and custom image properties of various type of data. Current version starts to support adding exit metadata signatures. Please read Exif tags specifications carefully to ensure when using different metadata identifiers that could be reserved for standard Exif tag properties.

    ImagesMetadataSignOptions class properties
  2. Class ImagesMetadataSignature was updated with constructor and conversion methods.
    Public sealed class ImageMetadataSignature was updated with constructor that expects identifier and value. Class supports any standard data types, same as methods to convert. Please carefully read Exif tags specifications to clarify what Id values are acceptable for your scenarios of using Image Metadata signature.

    Image Metadata Signature class properties

    Several methods were added for Metadata value conversion to any supported standard type.

    Image Metadata methods

    Following example demonstrates using different Image Metadata signatures to be posted on Image Document.

    Sing Image document with Metadata Signatures
  3. New public class SquareBorderLine inherits BorderLine and was added to implement square signature with rounded corners.

    This class is able to contain data about radius of square signature corners.

    SquareBorderLine class properties
    SquareBorderLine Example
  4. New public class Corners was added to implement storage for square corners radius values. Zero value means no rounded corner.

    This class is able to contain data about four corners of square object.

    Corners class properties
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