private void SendPhone()
        {
            char[] textBuf;

            textBuf = this.textBox1.Text.ToCharArray();
            rs232Output(textBuf);
            //轉換成字串
            textBuf = "01001043".ToCharArray();
            rs232Output(textBuf);
           //直接寫入字串
            serialPort1.Write("0");
           //寫入Byte
            /*
                byte[] bytestosend = { 0x14, 0x0E };

            serialPort1.Write(bytestosend, 0, bytestosend.Length);
            /*
        }


   // 經由RS232 字串傳送
        private void rs232Output(char[] phoneNum)
        {
            try
            {
                for (int i = 0; i < phoneNum.Length; i++)
                {
                    serialPort1.Write(phoneNum, i, 1);
                    //serialPort.Write("A");
                }
                /*
                // 傳送 Enter 的 ascii code
                byte[] commEnter = new byte[] { 0x0D, 0x0A };
                for (int i = 0; i < 2; i++)
                {
                    serialPort1.Write(commEnter, i, 1);
                }*/
            }
            catch
            {
                this.button2.Text = "Connect";
                comboBox1.Text = "";

                comboBox1.Items.Clear();
                try
                {
                    serialPort1.DiscardInBuffer();       // RX
                    serialPort1.DiscardOutBuffer();      // TX
                                                         // 關閉 PORT
                    this.serialPort1.Close();
                }
                catch { }




            }
            Console.WriteLine("output Phone Number" + phoneNum.ToString());
        }