How to Extract Image from .DOCX using DocumentFormat.OpenXml.Paragraph?

Question

I need to extract text and images from a DOCX file in to a text file (save images as graphic files of course). Using code below how can I get the image and save it with a reference inside the text file?

If I use:

List<ImagePart> imgPart = wordProcessingDoc.MainDocumentPart.ImageParts.ToList();

I can get all the images but sometimes the one image is used in several places. I cannot find out the reference to grab that particular image from the list. Here is the sample code taken from (Extract table from DOCX):

public static string ReadAllTextFromDocx(FileInfo fileInfo)
{
    StringBuilder stringBuilder;
    using (WordprocessingDocument wordprocessingDocument = WordprocessingDocument.Open(fileInfo.FullName, false))
    {
        NameTable nameTable = new NameTable();
        XmlNamespaceManager xmlNamespaceManager = new XmlNamespaceManager(nameTable);
        xmlNamespaceManager.AddNamespace("w", "http://schemas.openxmlformats.org/wordprocessingml/2006/main");

        string wordprocessingDocumentText;
        using (StreamReader streamReader = new StreamReader(wordprocessingDocument.MainDocumentPart.GetStream()))
        {
            wordprocessingDocumentText = streamReader.ReadToEnd();
        }

        stringBuilder = new StringBuilder(wordprocessingDocumentText.Length);

        XmlDocument xmlDocument = new XmlDocument(nameTable);
        xmlDocument.LoadXml(wordprocessingDocumentText);

        XmlNodeList paragraphNodes = xmlDocument.SelectNodes("//w:p", xmlNamespaceManager);
        foreach (XmlNode paragraphNode in paragraphNodes)
        {
            XmlNodeList textNodes = paragraphNode.SelectNodes(".//w:t | .//w:tab | .//w:br | .//w:drawing", xmlNamespaceManager);
            foreach (XmlNode textNode in textNodes)
            {
                switch (textNode.Name)
                {
                    case "w:t":
                        stringBuilder.Append(textNode.InnerText);
                        break;

                    case "w:tab":
                        stringBuilder.Append("\t");
                        break;

                    case "w:br":
                        stringBuilder.Append("\v");
                        break;
                    case "w:drawing":
                        stringBuilder.Append("----------------IMAGE HERE-------------");
                        break;
                }
            }

            stringBuilder.Append(Environment.NewLine);
        }
    }

    return stringBuilder.ToString();
}

score 1 · Accepted Answer · edited May 23 '17 at 12:34

I found the answer in this post: Replace image in word doc using OpenXML

var imageParts =from graphic in par.Descendants<DocumentFormat.OpenXml.Drawing.Graphic>()
let graphicData = graphic.Descendants<DocumentFormat.OpenXml.Drawing.GraphicData>().FirstOrDefault()
                               let pic = graphicData.ElementAt(0)
                               let nvPicPrt = pic.ElementAt(0).FirstOrDefault()
                               let blip = pic.Descendants<DocumentFormat.OpenXml.Drawing.Blip>().FirstOrDefault()
                               select new
                               {
                                   Id = blip.GetAttribute("embed", xr).Value,
                                   Filename = nvPicPrt.GetAttribute("name", xpic).Value
                               };

score 1 · Answer 2 · answered Jun 26 '18 at 04:26

You can use get streams of image from ImagePart.

var images = from graphic in paragraph
                .Descendants<DocumentFormat.OpenXml.Drawing.Graphic>()
            let graphicData = graphic.Descendants<DocumentFormat.OpenXml.Drawing.GraphicData>().FirstOrDefault()
            let pic = graphicData.ElementAt(0)
            let nvPicPrt = pic.ElementAt(0).FirstOrDefault()
            let blip = pic.Descendants<DocumentFormat.OpenXml.Drawing.Blip>().FirstOrDefault()
            join part in WordprocessingDocument.MainDocumentPart.Parts on blip.Embed.Value equals part
                .RelationshipId
            let image = part.OpenXmlPart as ImagePart
            select new
            {
                Id = blip.Embed,
                fileStream = image.GetStream()
            } ;

How to Extract Image from .DOCX using DocumentFormat.OpenXml.Paragraph?

2 Answers2