How do I move the caret a certain number of positions in a WPF RichTextBox?

Question

I want to move the caret 4 positions to the right of where my caret currently is. I\'m registered for PreviewKeyDown, and calling InsertTextInRun()

Answer 1

Use the GetInsertionPosition() method on the CaretPosition TextPointer. This will allow you to insert the text before the caret.

private void rtb_PreviewKeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Tab)
    {
        rtb.CaretPosition.GetInsertionPosition(LogicalDirection.Backward).InsertTextInRun("    ");
        e.Handled = true;
    }
}