Open XML SDK - AddImagePart - Change image location from /media to /word/media

Question

I am trying to insert an image into a document from C# using the Open XML SDK 2.5. The document is subsequently going to be uploaded to Google Drive and converted to a Google Document.

I am currently using the MainDocumentPart.AddImagePart method which inserts the image into the /media folder of the file hierarchy. However, Drive only wants to read the image if it is located in the /word/media folder.

Opening the document in Microsoft Word and saving it again relocates the image to the /word/media folder (and updates the part relationships), and thus makes Drive able to read the image, but the file is not going to be edited in Word before being uploaded to Drive.

Is there any way to place the image in the /word/media folder, short of closing the file in Open XML SDK, opening it up as a zip-archive, relocating the images and updating the relationships manually?

Answer 1

To add an image to the /word/media folder using the Open XML SDK 2.5 you have to create the package part for the image yourself. The AddImagePart() member function of the MainDocumentPart class always stores the image in the /media folder.

The code below shows how to insert an image into the /word/media folder using the following steps:

1. Create a PackagePart with the path Uri set to /word/media.
2. Feed the image data into the package part.
3. Create a PackageReleationship for the image.
4. Use the ID of the PackageReleationship to reference the image in the word document.

I've copied the code for the AddImageToBody() function from this MSDN website.

static void Main(string[] args)
{
  InsertAPicture("mydoc.docx", "mypic.jpg");      
}

public static void InsertAPicture(string document, string fileName)
{
  using (WordprocessingDocument wordprocessingDocument =
      WordprocessingDocument.Open(document, true))
  {
    MainDocumentPart mainPart = wordprocessingDocument.MainDocumentPart;

    Uri imageUri = new Uri("/word/media/" +
      System.IO.Path.GetFileName(fileName), UriKind.Relative);

    // Create "image" part in /word/media
    // Change content type for other image types.
    PackagePart packageImagePart = 
      wordprocessingDocument.Package.CreatePart(imageUri, "Image/jpeg");

    // Feed data.
    byte[] imageBytes = File.ReadAllBytes(fileName);
    packageImagePart.GetStream().Write(imageBytes, 0, imageBytes.Length);

    PackagePart documentPackagePart = 
      mainPart.OpenXmlPackage.Package.GetPart(new Uri("/word/document.xml", UriKind.Relative));

    Console.Out.WriteLine(documentPackagePart.Uri);

    // URI to the image is relative to releationship document.
    PackageRelationship imageReleationshipPart = documentPackagePart.CreateRelationship(
          new Uri("media/" + System.IO.Path.GetFileName(fileName), UriKind.Relative),
          TargetMode.Internal, "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image");

    AddImageToBody(wordprocessingDocument, imageReleationshipPart.Id);
  }
}

private static void AddImageToBody(WordprocessingDocument wordDoc, string relationshipId)
{
  var element =
       new Drawing(
           new DW.Inline(
               new DW.Extent() { Cx = 990000L, Cy = 792000L },
               new DW.EffectExtent()
               {
                 LeftEdge = 0L,
                 TopEdge = 0L,
                 RightEdge = 0L,
                 BottomEdge = 0L
               },
               new DW.DocProperties()
               {
                 Id = (UInt32Value)1U,
                 Name = "Picture 1"
               },
               new DW.NonVisualGraphicFrameDrawingProperties(
                   new A.GraphicFrameLocks() { NoChangeAspect = true }),
               new A.Graphic(
                   new A.GraphicData(
                       new PIC.Picture(
                           new PIC.NonVisualPictureProperties(
                               new PIC.NonVisualDrawingProperties()
                               {
                                 Id = (UInt32Value)0U,
                                 Name = "New Bitmap Image.jpg"
                               },
                               new PIC.NonVisualPictureDrawingProperties()),
                           new PIC.BlipFill(
                               new A.Blip(
                                   new A.BlipExtensionList(
                                       new A.BlipExtension()
                                       {
                                         Uri =
                                           "{28A0092B-C50C-407E-A947-70E740481C1C}"
                                       })
                               )
                               {
                                 Embed = relationshipId,
                                 CompressionState =
                                 A.BlipCompressionValues.Print
                               },
                               new A.Stretch(
                                   new A.FillRectangle())),
                           new PIC.ShapeProperties(
                               new A.Transform2D(
                                   new A.Offset() { X = 0L, Y = 0L },
                                   new A.Extents() { Cx = 990000L, Cy = 792000L }),
                               new A.PresetGeometry(
                                   new A.AdjustValueList()
                               ) { Preset = A.ShapeTypeValues.Rectangle }))
                   ) { Uri = "http://schemas.openxmlformats.org/drawingml/2006/picture" })
           )
           {
             DistanceFromTop = (UInt32Value)0U,
             DistanceFromBottom = (UInt32Value)0U,
             DistanceFromLeft = (UInt32Value)0U,
             DistanceFromRight = (UInt32Value)0U,
             EditId = "50D07946"
           });

  wordDoc.MainDocumentPart.Document.Body.AppendChild(
    new DocumentFormat.OpenXml.Wordprocessing.Paragraph(
      new DocumentFormat.OpenXml.Wordprocessing.Run(element)));
}

Of course, if you want to add other image types (e.g. PNG) you have to change the the content type.