SerialPort 串口开发

 private SerialPort sPort = new SerialPort();         //串行端口资源

        /// <summary>
        /// 函数功能：打开串口/关闭串口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            sPort.PortName = "com3";//串口的portname
            sPort.BaudRate = 9600;//串口的波特率
            sPort.Open();
        }

        private void btnSend_Click(object sender, EventArgs e)
        {
            //对于中文的话,要先对其进行编码,将其转换成 _Base64String ,否则你得不到中文字符串的
            byte[] data = Encoding.Unicode.GetBytes(textBox2.Text);
            string str = Convert.ToBase64String(data);
            sPort.WriteLine(str);
            MessageBox.Show("数据发送成功", "系统提示");
        }

        private void button1_Click_1(object sender, EventArgs e)
        {
            //解码然后将字符串赋值给 文本框的 文本区
            byte[] data = Convert.FromBase64String(sPort.ReadLine());
            textBox1.Text = Encoding.Unicode.GetString(data);
        }