Merging tow documents using AltChunk

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  • #3825


    Hi Eric,

    I am trying to merge document 1 to document 2 in place of a paragraph of document 2.

    The Paragraph is appended dynamically to document 2.I am using altchunk and insertafter methods as below.

    I am getting Operation is not valid due to current state of object at mainPart.Document.Body.InsertAfter(altChunk, mergeFieldParagraph);

    Appreciate your help. Have been truck on this for 3 days.

    public void FindAndReplaceMergeFieldsWithDocumentContent(Dictionary<string, string> documentsToMerge,bool bAppendMergeTags=true)
    MainDocumentPart mainPart = this.MainDocumentPart;
    int counter = 1;
    foreach (var documentToMerge in documentsToMerge)
    string altChunkId = “AltChunkId” + counter;
    AlternativeFormatImportPart chunk = mainPart.AddAlternativeFormatImportPart(
    AlternativeFormatImportPartType.WordprocessingML, altChunkId);
    using (FileStream fileStream = File.Open(documentToMerge.Value, FileMode.Open))
    AltChunk altChunk = new AltChunk();
    altChunk.Id = altChunkId;

    mainPart.Document.Body.AppendChild(new Paragraph(new Run(new Break() { Type = BreakValues.Page })));
    //next document
    var mergeFieldParagraph = FindParagraphWithMergeField(mainPart.Document.Body, documentToMerge.Key, bAppendMergeTags);
    mainPart.Document.Body.InsertAfter(altChunk, mergeFieldParagraph);

    //Remove Merge Field Paragraph after document content is inserted
    counter = counter + 1;

    public Paragraph FindParagraphWithMergeField(OpenXmlElement parent, string term, bool bAppendMergeTags = true)
    term = TemplateContentTag.MergeFieldStartTag + term + TemplateContentTag.MergeFieldEndTag;
    //Merge Field is of format “«Section3»”. Get the paragraph containing this merge field
    var result = parent.Descendants<Paragraph>().Where(t => t.InnerText.Contains(term)).FirstOrDefault();
    return result;

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