Dynamically add image to PowerPoint openxml?

Question

I am creating power point 2007 files using the openxml. I am able to add slides, shapes, text and manipulate them to create custom reports. However, I can not find an example on how to dynamically load an image into my power points. In principle I imagine that it would involve adding the image as a resource and then adding a reference to that resource. Any example code would be great help. Thank you.

Answer 1

To dynamically add an image to a PowerPoint presentation using Open XML SDK, you need to:

1. Add the image as a part (usually JPEG or PNG) to the presentation.
2. Create a reference (relationship) to that image.
3. Add a picture element to the slide that uses that image.

Here's a complete C# example to add the photo to a slide:

using DocumentFormat.OpenXml.Packaging;

using DocumentFormat.OpenXml.Presentation;

using A = DocumentFormat.OpenXml.Drawing;

using P = DocumentFormat.OpenXml.Presentation;

using System.IO;

using System.Linq;

public class PowerPointImageAdder

{

public static void AddImageToSlide(string presentationFile, string imagePath, int slideIndex = 0)

{

using (PresentationDocument presentationDoc = PresentationDocument.Open(presentationFile, true))

{

PresentationPart presentationPart = presentationDoc.PresentationPart;

SlidePart slidePart = GetSlidePartByIndex(presentationPart, slideIndex);

// Add image part

ImagePart imagePart = slidePart.AddImagePart(ImagePartType.Jpeg);

using (FileStream stream = new FileStream(imagePath, FileMode.Open))

{

imagePart.FeedData(stream);

}

string relationshipId = slidePart.GetIdOfPart(imagePart);

// Define picture ID and name

string embedId = relationshipId;

string picName = Path.GetFileName(imagePath);

uint shapeId = 1025U;

// Create the picture

P.Picture picture = new P.Picture(

new P.NonVisualPictureProperties(

new P.NonVisualDrawingProperties() { Id = shapeId, Name = picName },

new P.NonVisualPictureDrawingProperties(new A.PictureLocks() { NoChangeAspect = true }),

new ApplicationNonVisualDrawingProperties()

),

new P.BlipFill(

new A.Blip() { Embed = embedId },

new A.Stretch(new A.FillRectangle())

),

new P.ShapeProperties(

new A.Transform2D(

new A.Offset() { X = 1000000L, Y = 1000000L }, // Position (X, Y)

new A.Extents() { Cx = 3000000L, Cy = 3000000L } // Size (width, height)

),

new A.PresetGeometry(new A.AdjustValueList()) { Preset = A.ShapeTypeValues.Rectangle }

)

);

// Add to the slide

slidePart.Slide.CommonSlideData.ShapeTree.AppendChild(picture);

// Save the slide

slidePart.Slide.Save();

}

}

// Helper method: get slide part by index

private static SlidePart GetSlidePartByIndex(PresentationPart presentationPart, int slideIndex)

{

var slideIdList = presentationPart.Presentation.SlideIdList;

SlideId slideId = slideIdList.ChildElements[slideIndex] as SlideId;

string relId = slideId.RelationshipId;

return (SlidePart)presentationPart.GetPartById(relId);

}

}