winform下richtextbox 特定字符颜色的改变

winform下richtextbox 特定字符颜色的改变

此程序特定字符为"(*)"

 private void richtextbox _TextChanged(object sender, EventArgs e)
        {
            string[] str = richtextbox .Text.Split(new string[] { "(*)" }, StringSplitOptions.RemoveEmptyEntries);
            int p2=0;
            for (int i = 0; i < str.Length;i++ )
            {
                int p1 = Alisturl.Text.IndexOf("(*)",p2);
                if (p1 != -1)
                {
                    richtextbox.Select(p1, 3);
                    richtextbox.SelectionColor = Color.DarkGreen;
                    p2 = p1 + 3;
                }
            }
            richtextbox.Refresh();
        }