public static void AddSvg(string docPath, string svgPath)
{
if (docPath == null)
{
throw new ArgumentNullException(nameof(docPath));
}
if (svgPath == null)
{
throw new ArgumentNullException(nameof(svgPath));
}
using (PresentationDocument presentationDocument = PresentationDocument.Open(docPath, true))
{
// Get the relationship ID of the first slide.
PresentationPart presentationPart = presentationDocument.PresentationPart;
// Verify that the presentation part and presentation exist.
if (presentationPart != null && presentationPart.Presentation != null)
{
OpenXmlElementList slideIds = presentationPart.Presentation.SlideIdList.ChildElements;
if (slideIds.Count > 0)
{
string relId = (slideIds[0] as SlideId).RelationshipId;
SlidePart slidePart = (SlidePart)presentationPart.GetPartById(relId);
// Get count of relationships and increment by one to make next unique id
int partsCount = slidePart.Parts.Count();
string pngId = $"rId{++partsCount}";
string svgId = $"rId{++partsCount}";
var creationId = new DocumentFormat.OpenXml.Office2016.Drawing.CreationId();
creationId.AddNamespaceDeclaration("a16", "http://schemas.microsoft.com/office/drawing/2014/main");
creationId.Id = "{E36DC281-2F17-44E3-80EA-AB5BFA90E4D7}";
var picture = new DocumentFormat.OpenXml.Presentation.Picture();
// add non visual properties to picture
picture.NonVisualPictureProperties = new DocumentFormat.OpenXml.Presentation.NonVisualPictureProperties();
picture.NonVisualPictureProperties.NonVisualDrawingProperties = new DocumentFormat.OpenXml.Presentation.NonVisualDrawingProperties()
{
Id = new UInt32Value((uint)++partsCount), Name = "Picture 1"
};
picture.NonVisualPictureProperties.NonVisualDrawingProperties.AppendChild(new DocumentFormat.OpenXml.Drawing.ExtensionList(
new Extension(
creationId)
{
Uri = "{FF2B5EF4-FFF2-40B4-BE49-F238E27FC236}"
}));
picture.NonVisualPictureProperties.NonVisualPictureDrawingProperties = new DocumentFormat.OpenXml.Presentation.NonVisualPictureDrawingProperties();
picture.NonVisualPictureProperties.ApplicationNonVisualDrawingProperties = new ApplicationNonVisualDrawingProperties();
picture.NonVisualPictureProperties.NonVisualPictureDrawingProperties.PictureLocks = new PictureLocks()
{
NoChangeAspect = true
};
// add blipfill
picture.BlipFill = new DocumentFormat.OpenXml.Presentation.BlipFill();
picture.BlipFill.Blip = new Blip()
{
Embed = svgId
};
picture.BlipFill.AppendChild(new Stretch(
new FillRectangle()));
BlipExtensionList blipExtensionList = new BlipExtensionList();
Extension ext = blipExtensionList.AppendChild(new Extension());
ext.Uri = string.Empty;
ext.AppendChild(new SVGBlip());
picture.BlipFill.Blip.AppendChild(blipExtensionList);
picture.ShapeProperties = new DocumentFormat.OpenXml.Presentation.ShapeProperties();
picture.ShapeProperties.Transform2D = new Transform2D();
picture.ShapeProperties.Transform2D.Offset = new Offset();
picture.ShapeProperties.Transform2D.Offset.X = new Int64Value(5638800L);
picture.ShapeProperties.Transform2D.Offset.Y = new Int64Value(2971800L);
picture.ShapeProperties.Transform2D.Extents = new Extents();
picture.ShapeProperties.Transform2D.Extents.Cx = new Int64Value(914400L);
picture.ShapeProperties.Transform2D.Extents.Cy = new Int64Value(914400L);
picture.ShapeProperties.AppendChild(new PresetGeometry(
new AdjustValueList())
{
Preset = ShapeTypeValues.Rectangle
});
// Create a temporary in memory png file from the svg (inserting svg requires a png copy to be visible)
// Using https://www.nuget.org/packages/Svg/ to convert svg to png
SvgDocument svgDocument = SvgDocument.Open(svgPath);
using System.Drawing.Bitmap bitmap = svgDocument.Draw();
string fileName = System.IO.Path.GetTempPath() + Guid.NewGuid().ToString() + ".png";
bitmap.Save(fileName, ImageFormat.Png);
// Add png to slidePart
using FileStream pngFileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
pngFileStream.Seek(0, SeekOrigin.Begin);
ImagePart pngImagePart = slidePart.AddImagePart(ImagePartType.Png, pngId);
pngImagePart.FeedData(pngFileStream);
picture.BlipFill.Blip.Embed = pngId;
// Add image part with new svg id
using FileStream svgFileStream = new FileStream(svgPath, FileMode.Open, FileAccess.Read);
svgFileStream.Seek(0, SeekOrigin.Begin);
ImagePart svgImgPart = slidePart.AddImagePart(ImagePartType.Svg, svgId);
svgImgPart.FeedData(svgFileStream);
IEnumerable <SVGBlip> sVGBlips = blipExtensionList.Descendants <SVGBlip>();
sVGBlips.First().Embed = svgId;
slidePart.Slide.CommonSlideData.ShapeTree.AppendChild(picture);
}
}
}
}
