Inserting Formatted HTML content in another RadFlowDocument using WordsProcessing

Updated on Oct 2, 2025

Environment

Version	Product	Author
2025.3.806	RadWordsProcessing	Desislava Yordanova

Description

Learn how to insert HTML content at specific locations within a RadFlowDocument using Telerik WordsProcessing.

Input Content	Output Content

Solution

To insert HTML content at specific locations in a RadFlowDocument, follow these steps:

1. Use the HtmlFormatProvider to import HTML content into a RadFlowDocument.

2. Use the RadFlowDocumentEditor to insert the imported document (step 1) into a specific location in your target document.

Example:

csharp

            RadFlowDocument originalDocument = new RadFlowDocument();
            DocxFormatProvider docxProvider = new DocxFormatProvider();
            originalDocument = docxProvider.Import(File.ReadAllBytes("original.docx"), TimeSpan.FromSeconds(10));

            HtmlFormatProvider htmlProvider = new HtmlFormatProvider();
            RadFlowDocument htmlDocument = htmlProvider.Import(File.ReadAllText("content.html"), TimeSpan.FromSeconds(10));
             
            // Get paragraphs from the imported document
            var importedParagraphs = htmlDocument.EnumerateChildrenOfType<Paragraph>().ToList();

            // Move editor to the start of the target paragraph
            RadFlowDocumentEditor editor = new RadFlowDocumentEditor(originalDocument);

            var tableCells = originalDocument.EnumerateChildrenOfType<TableCell>().ToList();
            TableCell cell = tableCells[3] as TableCell;
            editor.MoveToParagraphStart(cell.Blocks.First() as Paragraph);

            editor.InsertDocument(htmlDocument); 

            string outputFilePath = "output.docx";
            File.Delete(outputFilePath);
            using (Stream output = File.OpenWrite(outputFilePath))
            {
                docxProvider.Export(originalDocument, output, TimeSpan.FromSeconds(10));
            }

            Process.Start(new ProcessStartInfo() { FileName = outputFilePath, UseShellExecute = true });

Additional Notes

• To target specific locations in the document, use the RadFlowDocumentEditor to navigate to the desired position.
• Ensure the original document and imported HTML content are compatible in terms of styles and formatting.

See Also

• HtmlFormatProvider
• Insert Documents
• RadFlowDocumentEditor