Sending Swedish and Chinese signs to Docx using OpenXML and RTF

Question

Goal

Passing Swedish and Chinese signs to a DocX-file in a RTF format.^[2]

Description

I need to dynamically generate a RTF-formatted string containing Swedish and Chinese signs and send it to an existing Docx-file. I have managed to handle the Swedish diaereses (åäö) but I can't manage to get the Chinese signs to be shown properly, instead they are shown as ????

    private void buttonSendDiaeresesToDocx_Click(object sender, EventArgs e)
    {
        var desktop = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
        var filename = @"SpecialCharactersInDocx.docx";
        var filepath = Path.Combine(desktop, filename);

        //Dynamic content fetched from the database.
        var content = "This should be Swedish and Chinese signs -> åäö - 部件名称";

        var rtfEncodedString = new StringBuilder();
        rtfEncodedString.Append(@"{\rtf1\ansi{\fonttbl\f0\fswiss Helvetica;}\f0\pard ");
        rtfEncodedString.Append(content);
        rtfEncodedString.Append(@"\par}");

        removeExistingFile(filepath);
        createEmptyDocx(filepath);

        addRtfToWordDocument(filepath, rtfEncodedString.ToString());

        openDocx(filepath);
    }

    private void addRtfToWordDocument(string filepath, string rtfEncodedString)
    {
        //Implemented as suggested at
        //http://stackoverflow.com/a/14861397/1997617

        using (WordprocessingDocument doc = WordprocessingDocument.Open(filepath, true))
        {
            string altChunkId = "AltChunkId1";

            MainDocumentPart mainDocPart = doc.MainDocumentPart;
            AlternativeFormatImportPart chunk = mainDocPart.AddAlternativeFormatImportPart(
                AlternativeFormatImportPartType.Rtf, altChunkId);

            using (MemoryStream ms = new MemoryStream(Encoding.Default.GetBytes(rtfEncodedString)))
            {
                chunk.FeedData(ms);
            }

            AltChunk altChunk = new AltChunk();
            altChunk.Id = altChunkId;

            mainDocPart.Document.Body.ReplaceChild(
              altChunk, mainDocPart.Document.Body.Elements<Paragraph>().Last());

            mainDocPart.Document.Save();
        }
    }

I have tried to use different encodings for the memory stream (Default, ASCII, UTF8, GB18030, ...) but none seams to work. I've also tried to convert the encoding of the rtfEncodedString variable before passing it to the addRtfToWordDocument method.

How do I make both the Swedish and the Chinese signs to show properly in the document?

Notes and references

1. The above code snippet is the part of my solution that I think is relevant for the question. The entire code sample can be downloaded at http://www.bjornlarsson.se/externals/SpecialCharactersInDocx02.zip
2. The RTF format is needed in the real world application since the content is to be shown as a table (with bold text) in the document.

Answer 1

You could use wordpad to create the rtf string for you. Open wordpad copy your content save to file. And then use a texteditor to read the rtf. your rtf string then looks like this :

{\rtf1\ansi\ansicpg1252\deff0\nouicompat\deflang1031{\fonttbl{\f0\fnil Consolas;}{\f1\fnil\fcharset0 Consolas;}{\f2\fnil\fcharset134 SimSun;}{\f3\fnil\fcharset0 Calibri;}}
{\*\generator Riched20 10.0.10586}\viewkind4\uc1 
\pard\sa200\sl276\slmult1\f0\fs19\lang7 This should be Swedish and Chinese signs -> \f1\'e5\'e4\'f6 - \f2\'b2\'bf\'bc\'fe\'c3\'fb\'b3\'c6\f3\fs22\par
}

maybe it helps.I tested the rtf string with your code and it works!

Dynamic generate rtf string via richtextbox :

private void buttonSendDiaeresesToDocx_Click(object sender, EventArgs e)
        {
            var desktop = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            var filename = @"SpecialCharactersInDocx.docx";
            var filepath = Path.Combine(desktop, filename);

            removeExistingFile(filepath);
            createEmptyDocx(filepath);
            rtfEncodedString = new StringBuilder();
            string contentOriginal = "This should be Swedish and Chinese signs -> åäö - 部件名称";
            string rtfStart =
                "{\\rtf1\\ansi\\ansicpg1252\\deff0\\deflang1031{\\fonttbl{\\f0\\fnil\\fcharset0 Microsoft Sans Serif;}{\\f1\\fmodern\\fprq6\\fcharset134 SimSun;}}\r\n\\viewkind4\\uc1\\pard\\f0\\fs17 ";
            RichTextBox rtfBox = new RichTextBox {Text = contentOriginal};
            string content = rtfBox.Rtf;
            content = content.Replace(rtfStart, "");
            rtfEncodedString.Append(rtfStart);
            rtfEncodedString.Append(content);
            rtfEncodedString.Append(@"\par}");
            addRtfToWordDocument(filepath, rtfEncodedString.ToString());

            openDocx(filepath);
        }