Replace all text in a rich text box

Question

I have a problem while trying to replace all text matching a particular word in a rich text box. This is the code i use

    public static void R         


        

Answer 1

Simply do this:

yourRichTextBox.Text = yourRichTextBox.Text.Replace("e","ea");

If you want to report the number of matches (which are replaced), you can try using Regex like this:

MessageBox.Show(Regex.Matches(yourRichTextBox.Text, "e").Count.ToString());

UPDATE

Of course, using the method above has expensive cost in memory, you can use some loop in combination with Regex to achieve some kind of advanced replacing engine like this:

public void ReplaceAll(RichTextBox myRtb, string word, string replacement){
   int i = 0;
   int n = 0;
   int a = replacement.Length - word.Length;
   foreach(Match m in Regex.Matches(myRtb.Text, word)){          
      myRtb.Select(m.Index + i, word.Length);
      i += a;
      myRtb.SelectedText = replacement;
      n++;
   }
   MessageBox.Show("Replaced " + n + " matches!");
}