Trouble inserting HTML to a StructuredDocumentTag?

[stewlg]

We have an existing SDT workflow we’d like to use Aspose to improve, if possible.

I’m having difficulty inserting HTML into a SDT tag.

I’ve attached an entire free-standing demo project, including a sample .docx file, but the key code that’s failing goes like this:

/// 
/// Set a simple SDT text field using plain text
/// 
private static void SetSdtHtmlText(Document doc, StructuredDocumentTag sdtToChange, string htmlForSdt)
{
    // Check.EnsureNotNull(doc);
    // Check.EnsureNotNull(sdtToChange);

    // Reset IsShowingPlaceholderText to hide placeholder text.
    sdtToChange.IsShowingPlaceholderText = false;

    // Null fields are just blank
    htmlForSdt = htmlForSdt ?? string.Empty;

    var tmpParagraph = new Paragraph(doc);
    var tmpRun = new Run(doc);
    tmpParagraph.AppendChild(tmpRun);

    sdtToChange.RemoveAllChildren();
    // DOES NOT WORK
    sdtToChange.AppendChild(tmpParagraph);

    // We need to use Document Builder to insert HTML.
    var tmpDocBuilder = new DocumentBuilder(doc);
    tmpDocBuilder.MoveTo(tmpParagraph);

    tmpDocBuilder.InsertHtml(htmlForSdt);
}

This gives me a “Cannot insert a node of this type at this location.” error.

There are a other posts in this area, but none of them have helped me figure out what to do here.

All help appreciated

[tahir.manzoor]

Hi Stewart,

Thanks for your inquiry. Please note that Aspose.Words tries to mimic the same behavior as MS Word do. If you try to insert a Paragraph inside content control (ProjectsCoverageAssessment), MS Word also does not allow to insert a Paragraph. This is the reason you are facing the issue. Please read the detail of StructuredDocumentTag from here:
https://reference.aspose.com/words/net/aspose.words.markup/structureddocumenttag

var tmpParagraph = new Paragraph(doc);
var tmpRun = new Run(doc);
tmpParagraph.AppendChild(tmpRun);
sdtToChange.RemoveAllChildren();
// DOES NOT WORK
sdtToChange.AppendChild(tmpParagraph);