GroupDocs.Comparison for .NET 19.5 Release Notes

Major Features

Below is the list of most notable changes in release of GroupDocs.Comparison for .NET 19.5:

  • Implemented calculation of changes for Diagrams, Slides and PDF formats
  • Implemented getting document information method
  • Improved exceptions and error handling all around the projects for all supported formats
  • Fixed issue with getting images for HTML files
  • Fixed issue with Fonts detection
  • Fixed incorrect different in PDF
  • Improved changes detection in tables on Words documents

Full List of Issues Covering all Changes in this Release

KeySummaryIssue Type
COMPARISONNET-1847Calculate correct coordinates of changes for SlidesFeature
COMPARISONNET-1849 Calculate correct coordinates of changes for PDFFeature
COMPARISONNET-1852 Calculate correct coordinates of changes for DiagramsFeature
COMPARISONNET-1895 Implement Get document info methodFeature
COMPARISONNET-1773 Error handling improvements for all formatsImprovement
COMPARISONNET-1799 Improve change detection in tables on WordsImprovement
COMPARISONNET-1808 Comparison is not working on FootnoteBug
COMPARISONNET-1774 Can’t get images for HTML filesBug
COMPARISONNET-1805 Deleted items in comparison output is not as expectedBug
COMPARISONNET-1892 Incorrect difference info in PDFBug
COMPARISONNET-1899 Html MarkDeletedInsertedContentDeep BugBug
COMPARISONNET-1903 License issue in GroupDocs.Comparison for .NET applicationBug
COMPARISONNET-1906 Font detection exceptionBug
COMPARISONNET-1909 Word separation exceptionBug

Public API and Backward Incompatible Changes

  1. Extended PageImage properties
    For now PageImage class was extended by adding 2 public properties Width and Height

    Comparer comparer = new Comparer();
    // get the list of pages as images
    List<PageImage> sourceImages = comparer.ConvertToImages(sourcePath);
    // getting sizes of first page
    int h = sourceImages[0].Height;
    int w = sourceImages[0].Width;
  2. Getting coordinates of changes

    Getting coordinates of specific changes in Result document is working for Slides, PDF and Diagrams documents

    To use this feature you should specify in ComparisonSettings CalculateComponentCoordinates property

    ComparisonSetting settings = new ComparisonSetting
       CalculateComponentCoordinates = true;

    The coordinates of changes will be stored in Box property of ChangeInfo class

    List<ChangeInfo> changes = new List<ChangeInfo>(result.GetChanges());
    chages[0].Box // coordinates of first change

    Example of further using this option:

    ComparisonSettings comparisonsettings = new ComparisonSettings();
    comparisonSettings.StyleChangeDetection = true;
    //this setting specify that we want to have change coordinates
    comparisonSettings.CalculateComponentCoordinates = true;
    comparisonSettings.DetailLevel = DetailLevel.High;
    string sourcePath = "source.pdf";
    string targetPath = "target.pdf";
    string resultPath = "result.pdf;
    Comparer comparer = new Comparer();
    ICompareResult result = comparer.Compare(sourcePath, targetPath, comparisonSettings);
    List<PageImage> resultImages = comparer.ConvertToImages(resultPath);
    List<ChangeInfo> changes = new List<ChangeInfo>(result.GetChanges());
    //below the one of cases how we could use changes coordinates.
    //we are passing through pages object and draw a rectangle in the coordinates of changes
    foreach (PageImage image in resultImages)
        Bitmap bitmap = new Bitmap(image.PageStream);
        using (Graphics graphics = Graphics.FromImage(bitmap))
            foreach (ChangeInfo changeInfo in changes)
                //if something was Inserted draw a Blue rectange
                if (changeInfo.Type == TypeChanged.Inserted)
                    graphics.DrawRectangle(new Pen(Color.Blue), changeInfo.Box.X, changeInfo.Box.Y, changeInfo.Box.Width, changeInfo.Box.Height);
                //if something was Deleted draw a Red rectange
                if (changeInfo.Type == TypeChanged.Deleted)
                    graphics.DrawRectangle(new Pen(Color.Red), changeInfo.Box.X, changeInfo.Box.Y, changeInfo.Box.Width, changeInfo.Box.Height);
                //if something was Changes draw a Green rectange
                if (changeInfo.Type == TypeChanged.StyleChanged)
                    graphics.DrawRectangle(new Pen(Color.Green), changeInfo.Box.X, changeInfo.Box.Y, changeInfo.Box.Width, changeInfo.Box.Height);
        bitmap.Save(savePath + @"/Result_Pages/result_" + image.PageNumber + ".png");
  3. New DocumentInfo class

    New DocumentInfo class was added. This class contains following properties:

    NumberOfPages (read only) - the count of document pages
    PagesData (read only) - the list of PageInfo classes

    PageInfo class contains following properties:
    Width - the width of page
    Height - the height of page

    Informer informer = new Informer();
    //get information about document from filePath
    DocumentInfo documentInfo = informer.GetDocumentInfo(filePath);