Decide FontStyle (Bold, Italic, Underlined) for RichTextBox

Question

How exactly do you change the Font in a RichTextBox?

Looking around gives me old answers that doesn't seem to work any more. I thought it would be as simple as doing richtextbox1.Font = Font.Bold; or something similar. Turns out it's not, so I looked around. Apparently you have to change the FontStyle which is a readonly (??) property, but you have to do it making a new FontStyle Object.

But even then that doesn't work o.o

How do you do this? EDIT:

Doesn't seem to work :\

            rssTextBox.Document.Blocks.Clear();
            rssTextBox.FontWeight = FontWeights.Bold;
            rssTextBox.AppendText("Title: ");
            rssTextBox.FontWeight = FontWeights.Normal;
            rssTextBox.AppendText(rs.Title + "\n");
            rssTextBox.FontWeight = FontWeights.Bold;
            rssTextBox.AppendText("Publication Date: ");
            rssTextBox.FontWeight = FontWeights.Normal;
            rssTextBox.AppendText(rs.PublicationDate + "\n");
            rssTextBox.FontWeight = FontWeights.Bold;
            rssTextBox.AppendText("Description: ");
            rssTextBox.FontWeight = FontWeights.Normal;
            rssTextBox.AppendText(rs.Description + "\n\n");

Answer 1

Bold is a FontWeight. You can apply it directly.

As MSDN Doc states "Gets or sets the weight or thickness of the specified font."

You can either set it in xaml

<RichTextBox FontWeight="Bold" x:Name="richText" />

or in codebehind:

richText.FontWeight = FontWeights.Bold;

If your trying to switch FontFamily that would be like:

richText.FontFamily = new FontFamily("Arial");

or FontStyle:

richText.FontStyle = FontStyles.Italic;

Update: (for updating RichTextBox inline)

This is just a quick mock-up. Using this as an example. Please structure it for your requirements.

richText.Document.Blocks.Clear();
Paragraph textParagraph = new Paragraph();
AddInLineBoldText("Title: ", ref textParagraph);
AddNormalTextWithBreak(rs.Title, ref textParagraph);
AddInLineBoldText("Publication Date: ", ref textParagraph);
AddNormalTextWithBreak(rs.PublicationDate, ref textParagraph);
AddInLineBoldText("Description: ", ref textParagraph);
AddNormalTextWithBreak(rs.Description, ref textParagraph);
AddNormalTextWithBreak("", ref textParagraph);
richText.Document.Blocks.Add(textParagraph);

private static void AddInLineBoldText(string text, ref Paragraph paragraph) {
  Bold myBold = new Bold();
  myBold.Inlines.Add(text);
  paragraph.Inlines.Add(myBold);
}

private static void AddNormalTextWithBreak(string text, ref Paragraph paragraph) {
  Run myRun = new Run {Text = text + Environment.NewLine};
  paragraph.Inlines.Add(myRun);
}