Unable to replace block content control

Aspose.Words Product Family
1

Hi,

we are trying to replace tags with html text (which is a content control) but we get the following error:
‘The reference node is not a child of this node.’

the code we use is:

doc.Range.Replace(lookupString, "", new FindReplaceOptions(new ReplaceWithHtmlEvaluator(lookupString, input.Value, isContentControlRequired: input.IsContentControlRequired, isBlockContentControl: true)));

ReplaceAction IReplacingCallback.Replacing(ReplacingArgs e)
{
    // This is a Run node that contains either the beginning or the complete match.
    Node currentNode = e.MatchNode;
    // The first (and may be the only) run can contain text before the match,
    // in this case it is necessary to split the run.
    if (e.MatchOffset > 0)
        currentNode = SplitRun((Run)currentNode, e.MatchOffset);
    // This array is used to store all nodes of the match for further removing.
    ArrayList runs = new ArrayList();
    // Find all runs that contain parts of the match string.
    int remainingLength = e.Match.Value.Length;
    while (
    (remainingLength > 0) &&
    (currentNode != null) &&
    (currentNode.GetText().Length <= remainingLength))
    {
        runs.Add(currentNode);
        remainingLength = remainingLength - currentNode.GetText().Length;
        // Select the next Run node.
        // Have to loop because there could be other nodes such as BookmarkStart etc.
        do
        {
            currentNode = currentNode.NextSibling;
        }
        while ((currentNode != null) && (currentNode.NodeType != NodeType.Run));
    }
    // Split the last run that contains the match if there is any text left.
    if ((currentNode != null) && (remainingLength > 0))
    {
        SplitRun((Run)currentNode, remainingLength);
        runs.Add(currentNode);
    }
    // Create Document Buidler  
    var document = e.MatchNode.Document as Document;
    DocumentBuilder builder = new DocumentBuilder(document);
    var runToReplace = (Run)runs[runs.Count - 1];
    builder.MoveTo(runToReplace);

    if (ChangeToWhiteFont)
    {
        foreach (Run run in runs)
        {
            run.Font.Color = Color.White;
        }
        return ReplaceAction.Skip;
    }
    else if (IsContentControlRequired)
    {
        var tag = Searchstring.Replace("##", "").Replace("$$", "").Replace("**", "");
        StructuredDocumentTag sdtRichText = new StructuredDocumentTag(document, SdtType.RichText, IsBlockContentControl ? MarkupLevel.Block : MarkupLevel.Inline);
        sdtRichText.RemoveAllChildren();
        sdtRichText.Tag = tag;
        sdtRichText.IsShowingPlaceholderText = false;
        if (IsBlockContentControl)
        {
            Run run = new Run(document);
            run.Text = "";

            Paragraph para = new Paragraph(document);
            para.AppendChild(run);
            sdtRichText.AppendChild(para);
            // getting the error in below line 
            document.FirstSection.Body.InsertAfter(sdtRichText, runToReplace.ParentNode);
            builder.MoveTo(sdtRichText.FirstChild);
            builder.InsertHtml(ReplaceWith, HtmlInsertOptions.UseBuilderFormatting);
            if (builder.CurrentParagraph != null && builder.CurrentParagraph.ToString(SaveFormat.Text).Trim() == "")
                builder.CurrentParagraph.Remove();

            // formatting the content to match the searchstring's styles
            NodeCollection runNodes = sdtRichText.GetChildNodes(NodeType.Run, true);
            foreach (Run rn in runNodes)
            {
                rn.Font.Color = runToReplace.Font.Color;
                rn.Font.Name = runToReplace.Font.Name;
                rn.Font.Style = runToReplace.Font.Style;
                rn.Font.Size = runToReplace.Font.Size;
                rn.Font.Italic = runToReplace.Font.Italic;
                rn.Font.Bold = runToReplace.Font.Bold;
                rn.Font.StrikeThrough = runToReplace.Font.StrikeThrough;
            }
            if (runToReplace.ParentNode != null)
            {
                runToReplace.ParentNode.Remove();
            }
        }
        else
        {
            runToReplace.Text = ReplaceWith;
            sdtRichText.AppendChild(runToReplace.Clone(true));
            sdtRichText.LockContentControl = true;
            sdtRichText.LockContents = true;
            builder.InsertNode(sdtRichText);
        }
    }
    else
    {
        builder.InsertHtml(ReplaceWith, HtmlInsertOptions.UseBuilderFormatting);
        if (builder.CurrentParagraph != null && Searchstring.Contains(builder.CurrentParagraph.ToString(SaveFormat.Text).Trim()))
            builder.CurrentParagraph.Remove();
    }

    foreach (Run run in runs)
    {
        run.Remove();
    }

    return ReplaceAction.Skip;
}
2

I tried using

document.FirstSection.Body.InsertAfter(sdtRichText.FirstChild, document.FirstSection.Body.FirstParagraph);

but this added the sdt to the first page. I want this replaced in a specific place

3

@randomuser123 You should use the following code, if you need to place SDT after the parent node of the runToReplace node:

runToReplace.ParentNode.ParentNode.InsertAfter(sdtRichText, runToReplace.ParentNode);

In your code the error occurs because runToReplace.ParentNode is not child of document.FirstSection.Body. This can occur for example if runToReplace is not in the first section or in table.

4

hi alexey,

thank you, that worked

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