c# 串口 开发

在网上查了很多关于串口的知识。后来才发现原来c#里含有对串口开发的控件，害的我白忙活了半天。看来学习方法很重要....首先在窗体添加一个serialPort1控件。没有的去com组建里找出来。

                serialPort1.PortName;// 设置串口名称如“COM1”
                serialPort1.BaudRate;//设置串口波特率
                serialPort1.Parity;//奇偶校验检查协议
                serialPort1.ReadTimeout;//读取操作超时
                serialPort1.WriteTimeout;//写入操作超时

serialPort1.Open();//打开串口

serialPort1.Close();//关闭串口

             byte[] data = Encoding.Unicode.GetBytes("9600");
            string str = Convert.ToBase64String(data);
            serialPort1.WriteLine(str); //写入数据

//串口接收数据,本函数默认串口已经打开
        public void serialReceive(SerialPort serialPort1)
        {
            string ss = "";
            byte firstByte = Convert.ToByte(serialPort1.ReadByte());
            int bytesRead = serialPort1.BytesToRead;
            byte[] bytesData = new byte[bytesRead + 1];
            bytesData[0] = firstByte;
            for (int i = 1; i <= bytesRead; i++)
            {
                bytesData[i] = Convert.ToByte(serialPort1.ReadByte());
                ss = ss + bytesData[i].ToString();
            }
            textBox2.Text = ss;

                //textBox2.Text = serialPort1.ReadLine();
        }

        //串口发送数据,本函数默认串口已经打开
        public void serialSend(SerialPort serialPort1,string sendString)
        {
            //byte[] sendBytes = Encoding.Unicode.GetBytes(sendString);
            //string send64String = Convert.ToBase64String(sendBytes);
            if (serialPort1.IsOpen)
            {
                byte[] data = Encoding.Unicode.GetBytes("9600");
                serialPort1.Write(data, 0, data.Length);
                //serialPort1.WriteLine(sendString);
            }
            else
            {
                MessageBox.Show("请先打开串口！");
            }
        }