Change color and font for some part of text in WPF C#

Question

Is there a way to change color and font for some part of text which I want to put on TextBox or RichTextBox. I am using C# WPF.

For example

 richTextBox.AppendText("Text1 " + word + " Text2 "); 

Variable word for example to be other color and font from Text1 and Text2. Is it possible and how to do this?

Answer 1

If you just want to do some quick coloring, the simplest solution may be to use the end of the RTB content as a Range and apply formatting to it. For example:

TextRange rangeOfText1 = new TextRange(richTextBox.Document.ContentEnd, richTextBox.Document.ContentEnd); rangeOfText1.Text = "Text1 "; rangeOfText1.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Blue); rangeOfText1.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold);  TextRange rangeOfWord = new TextRange(richTextBox.Document.ContentEnd, richTextBox.Document.ContentEnd); rangeOfWord.Text = "word "; rangeOfWord.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Red); rangeOfWord.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Regular);  TextRange rangeOfText2 = new TextRange(richTextBox.Document.ContentEnd, richTextBox.Document.ContentEnd); rangeOfText2.Text = "Text2 "; rangeOfText2.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Blue); rangeOfText2.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold); 

If you are looking for a more advanced solution, I suggest reading this Microsoft Doc about Flow Document, as it gives you a great flexibility in formatting your text.

Answer 2

You can try this out.

public TestWindow() {     InitializeComponent();      this.paragraph = new Paragraph();     rich1.Document = new FlowDocument(paragraph);      var from = "user1";     var text = "chat message goes here";     paragraph.Inlines.Add(new Bold(new Run(from + ": "))     {         Foreground = Brushes.Red     });     paragraph.Inlines.Add(text);     paragraph.Inlines.Add(new LineBreak());     this.DataContext = this; } private Paragraph paragraph; 

Use the Document property of the RichTextBox.