how can I change the font open xml

Question

How can I change the font family of the document via OpenXml ? I tried some ways but, when I open the document, it's always in Calibri

Follow my code, and what I tried.

The Header Builder I think is useless to post

private static void BuildDocument(string fileName, List<string> lista, string tipo)
{                
    using (var w = WordprocessingDocument.Create(fileName, WordprocessingDocumentType.Document))
    {
        var mp = w.AddMainDocumentPart();
        var d = new DocumentFormat.OpenXml.Wordprocessing.Document();
        var b = new Body();
        var p = new DocumentFormat.OpenXml.Wordprocessing.Paragraph();
        var r = new Run();

        // Get and format the text.                                    
        for (int i = 0; i < lista.Count; i++)
        {
            Text t = new Text();                    
            t.Text = lista[i];
            if (t.Text == "          ")
            {
                r.Append(new CarriageReturn());
            }
            else
            {
                r.Append(t);
                r.Append(new CarriageReturn());
            }
        }

        // What I tried
        var rPr = new RunProperties(new RunFonts() { Ascii = "Arial" });                

        lista.Clear();                
        p.Append(r);                
        b.Append(p);
        var hp = mp.AddNewPart<HeaderPart>();
        string headerRelationshipID = mp.GetIdOfPart(hp);
        var sectPr = new SectionProperties();                
        var headerReference = new HeaderReference();                
        headerReference.Id = headerRelationshipID;
        headerReference.Type = HeaderFooterValues.Default;
        sectPr.Append(headerReference);
        b.Append(sectPr);
        d.Append(b);                

        // Customize the header.
        if (tipo == "alugar")
        {
            hp.Header = BuildHeader(hp, "Anúncio Aluguel de Imóvel");
        }
        else if (tipo == "vender")
        {
            hp.Header = BuildHeader(hp, "Anúncio Venda de Imóvel");
        }
        else
        {
            hp.Header = BuildHeader(hp, "Aluguel/Venda de Imóvel");
        }

        hp.Header.Save();
        mp.Document = d;
        mp.Document.Save();
        w.Close();
    }             
}

Answer 1

In order to style your text with a specific font follow the steps listed below:

1. Create an instance of the RunProperties class.
2. Create an instance of the RunFont class. Set the Ascii property to the desired font familiy.
3. Specify the size of your font (half-point font size) using the FontSize class.
4. Prepend the RunProperties instance to your run containing the text to style.

Here is a small code example illustrating the steps described above:

private static void BuildDocument(string fileName, List<string> text)
{
    using (var wordDoc = WordprocessingDocument.Create(fileName, WordprocessingDocumentType.Document))
    {
        var mainPart = wordDoc.AddMainDocumentPart();
        mainPart.Document = new Document();

        var run = new Run();

        foreach (string currText in text)
        {
            run.AppendChild(new Text(currText));
            run.AppendChild(new CarriageReturn());
        }

        var paragraph = new Paragraph(run);
        var body = new Body(paragraph);

        mainPart.Document.Append(body);

        var runProp = new RunProperties();

        var runFont = new RunFonts { Ascii = "Arial" };

        // 48 half-point font size
        var size = new FontSize { Val = new StringValue("48") }; 

        runProp.Append(runFont);
        runProp.Append(size);

        run.PrependChild(runProp);

        mainPart.Document.Save();
        wordDoc.Close();
    }
}

Hope, this helps.

Answer 2

If you are using Stylesheet just add an instance of FontName property at appropriate font index during Fonts initilaization.

    private Stylesheet GenerateStylesheet()
    {
        Stylesheet styleSheet = null;

        Fonts fonts = new Fonts(
            new Font( // Index 0 - default
                new FontSize() { Val = 8 },
                new FontName() { Val = "Arial"} //i.e. or any other font name as string
            );

        Fills fills = new Fills( new Fill(new PatternFill() { PatternType = PatternValues.None }));

        Borders borders = new Borders( new Border() );

        CellFormats cellFormats = new CellFormats( new CellFormat () );

        styleSheet = new Stylesheet(fonts, fills, borders, cellFormats);

        return styleSheet;
    }

Then use it in Workbook style part as below.

WorkbookStylesPart stylePart = workbookPart.AddNewPart<WorkbookStylesPart>();
stylePart.Stylesheet = GenerateStylesheet();
stylePart.Stylesheet.Save();