To insert an image into the header of a Word document using OpenXML, you need to follow a series of steps. First, make sure you have the necessary NuGet package installed in your project: DocumentFormat.OpenXml. Begin by creating a new document and defining the header. You’ll need to create a HeaderPart, and then add the image to it. The image should be in a compatible format (like PNG or JPEG) and must first be added as a Drawing object embedded to the header. You’ll use the AddImageToHeader method to encapsulate all this into a reusable function, which takes the header part and the path to your image as parameters.

Here’s a simplified code snippet demonstrating the process:

using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;

public void InsertImageIntoHeader(string filePath, string imagePath)
{
    using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(filePath, true))
    {
        HeaderPart headerPart = wordDoc.MainDocumentPart.AddNewPart();
        ImagePart imagePart = headerPart.AddImagePart(ImagePartType.Png);
        using (FileStream stream = new FileStream(imagePath, FileMode.Open))
        {
            imagePart.FeedData(stream);
        }
        string relationshipId = headerPart.GetIdOfPart(imagePart);
        Drawing drawing = new Drawing(
            new DW.Inline(
                new DW.Extent() { Width = 990000, Height = 792000 },
                new DW.EffectExtent() { LeftEdge = 0, RightEdge = 0, TopEdge = 0, BottomEdge = 0 },
                new DW.DocProperties() { Id = (UInt32Value)1U, Name = "Picture" },
                new DW.NonVisualGraphicFrameDrawingProperties(
                    new DW.GraphicFrameLocks() { NoChangeAspect = true }),
                new DW.Graphic(
                    new DW.GraphicData(
                        new A.Picture(
                            new A.NonVisualPictureProperties(
                                new A.NonVisualDrawingProperties() { Id = (UInt32Value)0U, Name = "Picture" },
                                new A.NonVisualPictureDrawingProperties()),
                            new A.BlipFill(new A.Blip() { Embed = relationshipId }) 
                            { 
                                Stretch = new A.Stretch(new A.FillRectangle()) 
                            },
                            new A.ShapeProperties(new A.Transform2D(new A.Offset() { X = 0, Y = 0 },
                            new A.Extents() { Width = 990000, Height = 792000 })) 
                            { 
                                PresetGeometry = new A.PresetGeometry() 
                                { 
                                    Preset = A.ShapeTypeValues.Rectangle 
                                } 
                            }
                        )
                    )
                )
            )
        );
        // Append Drawing to Header
        Paragraph para = new Paragraph(drawing);
        headerPart.Header = new Header(para);
        headerPart.Header.Save();
    }
}

Inserting an Image into Word Header using OpenXML

Hi there! I understand your struggle with inserting an image into the header of a Word document using OpenXML. Here’s a step-by-step guide to help you out.

Step-by-Step Instructions

1. Set Up Your Project:
   Make sure you have the DocumentFormat.OpenXml package installed in your project. You can do this via NuGet Package Manager in Visual Studio.
2. Create a Word Document:
   Start by creating a new Word document. Here’s a snippet to get you started:

   using DocumentFormat.OpenXml.Packaging;
   using DocumentFormat.OpenXml.Wordprocessing;
   
   // Create a Word document
   using (WordprocessingDocument wordDocument = WordprocessingDocument.Create("MyDocument.docx", DocumentFormat.OpenXml.WordprocessingDocumentType.Document))
   {
       // Add a main document part
       WordprocessingDocument.MainDocumentPart mainPart = wordDocument.AddMainDocumentPart();
       mainPart.Document = new Document();
       mainPart.Document.Append(new Body());
   }

3. Add a Header:
   You need to create a header part for your document:

   HeaderPart headerPart = mainPart.AddNewHeaderPart();
   headerPart.Header = new Header();
   

4. Insert Image in Header:
   Next, add the image to the header part. You’ll need to ensure your image is in a compatible format and that you have its file path. Here’s how to do it:

   string imagePath = "path/to/your/image.png";
   string relationshipId = headerPart.AddImagePart(ImagePartType.Png).GetIdOfPart();
   
   using (var stream = new FileStream(imagePath, FileMode.Open))
   {
       headerPart.GetStream().Write(new BinaryReader(stream).ReadBytes((int)stream.Length), 0, (int)stream.Length);
   }
   
   // Create the drawing element to insert into the header
   var drawing = new Drawing(
       new DW_INLINE(
           new DWExtent() { Cx = 990000, Cy = 792000 },
           new DWEffectExtent() { Right = 38100, Bottom = 38100 },
           new DWInlineGraphic(
               new A.Graphic(
                   new A.GraphicData(
                       new Picture(
                           new NonVisualPictureProperties(
                               new NonVisualDrawingProperties() { Id = 0, Name = "Picture" },
                               new NonVisualPictureDrawingProperties()),
                           new BlipFill(
                               new A.Blip() { Embed = relationshipId },
                               new Stretch(new A.FillRectangle())),
                           new ShapeProperties())))))
       )
   );
   
   headerPart.Header.Append(drawing);
   headerPart.Header.Save();
   

5. Attach Header to the Section:
   Finally, link the header to the document body:

   var sectionProperties = new SectionProperties() { HeaderReference = new HeaderReference() { Id = mainPart.GetIdOfPart(headerPart), Type = HeaderValues.Default } };
   mainPart.Document.Body.Append(sectionProperties);
   mainPart.Document.Save();
   }

Final Thoughts

That’s it! Your image should now be displayed in the header of your Word document. Remember to adjust the image dimensions and path according to your needs. Feel free to reach out if you have any more questions or run into issues. Good luck with your project!