Aspose.Slides for .NET 16.12.0 Release Notes

SLIDESNET-38070Set distance between tick mark on horizontal axisFeature
SLIDESNET-37941Getting duration of extracted video from presentationFeature
SLIDESNET-38126ArgumentException on saving presentationBug
SLIDESNET-38124Missing slides while converting pptx to pdfBug
SLIDESNET-38122KeyNotFoundException on loading presentationBug
SLIDESNET-38118Chart is improperly rendered in generated SVGBug
SLIDESNET-38114Presentation not savingBug
SLIDESNET-38112Exception on saving presentationBug
SLIDESNET-38108Exception on loading presentationBug
SLIDESNET-38094Wrong Data Table offset and legend key sizeBug
SLIDESNET-38089Ppt size increase after savingBug
SLIDESNET-38078Presentation changed after savingBug
SLIDESNET-38073Fill of an object change after saving pptBug
SLIDESNET-38072Header Footer removed after saving pptBug
SLIDESNET-38068Ppt changed after savingBug
SLIDESNET-38065Font changes from Calibri to MS PGothic after saving pptBug
SLIDESNET-38064Exception on saving presentationBug
SLIDESNET-38060Pptx changed after converting to pdfBug
SLIDESNET-38057Font changed from Calibri to Arial after saving presentationBug
SLIDESNET-38049Hyperlink removed after saving pptBug
SLIDESNET-38047Line style was changed after saving pptBug
SLIDESNET-38046Arc Drawing is removed after saving pptBug
SLIDESNET-38042Shapes do not clipped during render if they are outside of a chart areaBug
SLIDESNET-38037a * character is added to each slide after saving pptBug
SLIDESNET-38036NotImplementedException on saving presentationBug
SLIDESNET-38006Powerpoint slide to png conversion issueBug
SLIDESNET-38001Evaluation watermark showing up in powerpoint filesBug
SLIDESNET-37990High memory consumption while converting pptm to pdfBug
SLIDESNET-37988Date and slide number are lost in the footer of resaved PPTX to PPT during thumbnail generationBug
SLIDESNET-37981Different Footers placeholders recognized in ppt and pptxBug
SLIDESNET-37980Missing table on Notes MasterBug
SLIDESNET-37975Exception on saving presentationBug
SLIDESNET-37936Font type changes after converting pptx to pngBug
SLIDESNET-37929Incorrect character positioning in HTML representation of the presentation document in Safari for iOSBug
SLIDESNET-37923Images are less clear after converting Pptx to htmlBug
SLIDESNET-37855Quality of image changes after exporting to svgBug
SLIDESNET-37601Chart data fail to open in Edit mode on saving presentaitonBug
SLIDESNET-37518Links are not preserved for added ole frameBug
SLIDESNET-37326PptxReadException while loading presentationBug
SLIDESNET-37293Incorrect text rendering with slide cloningBug
SLIDESNET-37144Text rendered incorrectly in PDFBug
SLIDESNET-37136Bubble chart is drawing wrong on thumbnail generated from pptxBug
SLIDESNET-37081Highlight missing in generated PDFBug
SLIDESNET-37024PptxReadException thrown on loading pptxBug
SLIDESNET-36778The chart axis labels appear differently after savingBug
SLIDESNET-36699Chart is improperly rendered in generated thumbnailBug
SLIDESNET-36571The chart is rendered half of its width in thumbnail and PDFBug
SLIDESNET-35946Wrong display units for value axis for Scatter chart in exported PDFBug
SLIDESNET-35563The value axis values direction changes in exported PDFBug
SLIDESNET-35549Bullet Text are not coming fine after conversion from PPT to PDFBug
SLIDESNET-35355PPTX to PNG Conversion: Chart Missing in the generated PPTX fileBug
SLIDESNET-34061Category axis values scales are different in generated PDFBug

Public API Changes

Aspose.Slides.Metered class has been added

Aspose.Slides.Metered class has been added. It provides methods to set metered key and check consumption quantity for associated metered account. This new licensing method will be accessible soon.

Public methods

Metered() Initializes a new instance of this class. void SetMeteredKey(string publicKey, string privateKey) Sets metered public and private key. parameters:

  • publicKey - Metered pubilc key.
  • privateKey - Metered private key.
  • static decimal GetConsumptionQuantity() Gets consumption quantity.

**Usage example: **

Metered metered = new Metered();
metered.SetMeteredKey("PublicKey", "PrivateKey");
decimal consumption = Metered.GetConsumptionQuantity();

IAxis.TickMarksSpacing and IAxis.IsAutomaticTickMarksSpacing properties have been added.

IAxis.IsAutomaticTickMarksSpacing property specifies automatic tick marks spacing value. If false: use TickMarksSpacing property. IAxis.TickMarksSpacing specifies how many tick marks shall be skipped before the next one shall be drawn. Applied to category or series axis.

using (Presentation pres = new Presentation())
  IChart barChart = pres.Slides[0].Shapes.AddChart(ChartType.ClusteredBar, 50, 50, 600, 400, true); 
  barChart.Axes.VerticalAxis.IsAutomaticTickMarksSpacing = false; 
  barChart.Axes.VerticalAxis.TickMarksSpacing = 2;

New properties PicturesCompression and DeletePicturesCroppedAreas has been added to HTML and SVG options

The new properties PicturesCompression and DeletePicturesCroppedAreas has been added to IHtmlOptions and ISVGOptions.

PicturesCompression is an enum containing the following values:

  • Dpi330 - good quality for high-definition (HD) displays
  • Dpi220 - excellent quality on most printers and screens
  • Dpi150 - good for web pages and projectors
  • Dpi96 - minimize document size for sharing
  • Dpi72 - default compression level
  • DocumentResolution - use document resolution - the picture will not be compressed and used in document as-is

The value affects the pictures quality in generated SVG/HTML documents. Please note that the higher DPI, the larger resulting document.

DeletePicturesCroppedAreas is a boolean flag indicating if the cropped parts remain as part of the document. If true the cropped parts will be removed, if false they will be serialized in the document (which can possibly lead to a larger SVG/HTML file).

Here’s an example of export the presentation to SVG and HTML documents with 220 and 96 DPI respectively:

using (Presentation pres = new Presentation("pres.pptx"))
  using (FileStream stream = new FileStream("pres.svg", FileMode.OpenOrCreate))
    SVGOptions svgOptions = new SVGOptions
      PicturesCompression = PicturesCompression.Dpi220
    pres.Slides[0].WriteAsSvg(stream, svgOptions);
  HtmlOptions htmlOptions = new HtmlOptions
    PicturesCompression = PicturesCompression.Dpi96
  pres.Save("pres.html", SaveFormat.Html, htmlOptions);

New static property Header has been added to class FieldType

The new static property Header has been added to class FieldType. It allows getting the instance of FieldType class that represents “header” field type.

public static FieldType Header { get; }

The new API can be used like this:

using (Presentation pres = new Presentation("presentation.ppt"))
  ISlide slide = pres.Slides[0];
  IAutoShape shape = slide.Shapes[0] as IAutoShape;
  IParagraph paragraph = shape.TextFrame.Paragraphs[0];
  for (int portionIndex = 0; portionIndex < paragraph.Portions.Count; portionIndex++)
    IPortion portion = paragraph.Portions[portionIndex];
    IField field = portion.Field;
    if (field != null && field.Type == FieldType.Header) // FieldType.Header property is used to find portion with appropriate field type

SvgExternalFontsHandling enum, ISVGOptions.ExternalFontsHandling and SVGOptions.ExternalFontsHandling properties have been added

ExternalFontsHandling property has been added to Aspose.Slides.Export.ISVGOptions interface and Aspose.Slides.Export.SVGOptions class with return type of Aspose.Slides.Export.SvgExternalFontsHandling enum.

This property defines how Aspose.Slides should handle externally loaded fonts during slide export to SVG format. There are 3 possible options:

  • SvgExternalFontsHandling.AddLinksToFontFiles. In this case a separate css definition will be added to svg/defs section per each font that was actually used for some piece of text on the slide and was loaded externally by calling to FontsLoader.LoadExternalFonts method. Each definition contains local links to 3 separate font types: TTF, EOT and WOFF. To work correctly font files must be placed in the same directory as SVG file (could be copied there after the export) and must be named the same as original TTF file (for example FancyFont.ttf, FancyFont.eot, FancyFont.woff). If some of the fonts is missing there will be no error, but the resulting SVG file could be rendered incorrectly in some browsers (please take a look to ‘Font-browsers compatibility’ section below).
  • SvgExternalFontsHandling.Embed. In this case the same css definitions will be added based on the same principle, but the font files content will be embedded directly to SVG file. Choosing this option user should place EOF and WOFF versions of the font to the same directory as original TTF file (the path to which is passed to FontsLoader.LoadExternalFonts method) before the export. If some of the fonts are missing it won’t be added to SVG file at all and again it could result incorrect rendering in some browsers.
  • SvgExternalFontsHandling.Vectorize. In this case the text that uses externally loaded fonts will be transformed to graphical objects. It works the same way as when SVGOptions.Vectorize property is set to true, but only for external fonts.

Font-browser compatibility

To make result SVG file rendered correctly in most of modern browsers two additional font files format are recommended to be used along with regular TTF file.

EOT (Embedded Open Type) - for compatibility with all versions of IE. WOFF (Web Open Font Format) for compatibility with all other browsers and as an alternative to TTF.

If you don’t have a copy of the font in these formats, you can use a wide variety of 3rd party tools that allows to convert TTF file to EOT and WOFF formats.

Font license restrictions

Please take a note that some fonts might have restrictions on embedding or/and any other kind of distribution. Always check font license agreement before converting, copying or embedding it to SVG file.