WPF RichTextBox appending coloured text

Question

I\'m using the RichTextBox.AppendText function to add a string to my RichTextBox. I\'d like to set this with a particular colour. How can I do this?

Answer 1

If you want, you can also make it an extension method.

public static void AppendText(this RichTextBox box, string text, string color)
{
    BrushConverter bc = new BrushConverter();
    TextRange tr = new TextRange(box.Document.ContentEnd, box.Document.ContentEnd);
    tr.Text = text;
    try 
    { 
        tr.ApplyPropertyValue(TextElement.ForegroundProperty, 
            bc.ConvertFromString(color)); 
    }
    catch (FormatException) { }
}

This will make it so you can just do

myRichTextBox.AppendText("My text", "CornflowerBlue");

or in hex such as

myRichTextBox.AppendText("My text", "0xffffff");

If the color string you type is invalid, it simply types it in the default color (black). Hope this helps!