WhyCan Forum(哇酷开发者社区)

        private void ReflashPortToComboBox(SerialPort serialPort, ComboBox comboBox)
        {
            if (!serialPort.IsOpen)
            {//串口处于关闭状态
                comboBox.Items.Clear();
                string[] str = SerialPort.GetPortNames();
                if (str == null)
                {
                    MessageBox.Show("本机没有串口!", "Error");
                    return;
                }
                //添加串口
                foreach (string s in str)
                {
                    comboBox.Items.Add(s);
                    Console.WriteLine(s);
                }
            }
            else
            {
                MessageBox.Show("串口处于打开状态下，不能刷新串口列表", "Error");
            }
        }

        private void btn_open_com_Click(object sender, EventArgs e)
        {
            Int32 ibaudrate = Convert.ToInt32(cb_select_baudrate.SelectedItem.ToString());
            serialPort1.PortName = cb_select_com.SelectedItem.ToString();
            serialPort1.BaudRate = ibaudrate;
            serialPort1.Parity = (System.IO.Ports.Parity)Enum.Parse(typeof(System.IO.Ports.Parity), cb_select_check_bit.Text);
            serialPort1.StopBits = (System.IO.Ports.StopBits)Enum.Parse(typeof(System.IO.Ports.StopBits), cb_select_stop_bit.Text);
            serialPort1.DataBits = Convert.ToInt16(cb_select_data_bits.Text);

            //添加串口事件处理
            serialPort1.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(ReceiveData);


            try
            {
                serialPort1.Open();
                btn_open_com.Enabled = false;
                btn_close_com.Enabled = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show("串口打开失败"+ex, "Error");
            }


        }

//串口接收事件
        private void ReceiveData(object sender, SerialDataReceivedEventArgs e)
        {
            string content = serialPort1.ReadExisting();        //从串口中读取输入流,返回string
            
            ShowData(content);
        }
        private void ShowData(string text)
        {
            string receiveText = text;
            
            //更新接收数据计数
            recv_cntr += (UInt32)receiveText.Length;
            lab_recv_cntr.Text = recv_cntr.ToString();

            textBox_debug.AppendText("接收到了"+ receiveText.Length.ToString()+ "个数据: "+ text+"\r\n");

            if (rbtn_recv_hex.Checked)
            {//按HEX模式 展示接收到的内容 
                byte[] recData = System.Text.Encoding.Default.GetBytes(receiveText);// 将接受到的字符串据转化成数组；  

                foreach (byte str in recData)
                {
                    textBox_recv.AppendText(string.Format("{0:X2} ", str));
                }
            }
            else
            {//按ASCII模式 展示接收到的内容
                
                textBox_recv.AppendText(text);                   //将收到的字符串追加展示出来
            }

        }

        private void btn_send_Click(object sender, EventArgs e)
        {
            //串口打开的情况下，才能进行下一步操作
            if (!serialPort1.IsOpen) return;
            
            //发送内容不能为空 
            if ("" == textBox_send.Text) return;

            string sendData = textBox_send.Text;    //复制发送数据

            if (true == rbtn_send_ascii.Checked)
            {//字符模式
                try
                {
                    serialPort1.Write( sendData );
                    //更新发送数据计数
                    send_cntr += (UInt32)sendData.Length;
                    lab_send_cntr.Text = send_cntr.ToString();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "串口数据发送错误");
                    serialPort1.Close();
                    btn_open_com.Enabled = true;
                    btn_close_com.Enabled = false;
                }

            }
            else
            {//HEX模式 
                try
                {
                    sendData.Replace("0x", "");   //去掉0x
                    sendData.Replace("0X", "");   //去掉0X

                    string[] strArray = sendData.Split(new char[] { ',', '，', '\r', '\n', ' ', '\t' });
                    byte[] sendBuffer = new byte[strArray.Length];  //发送数据缓冲区
                    int decNum = 0,i = 0;
                    foreach (string str in strArray)
                    {
                        try
                        {
                            decNum = Convert.ToInt16(str, 16);
                            sendBuffer[i] = Convert.ToByte(decNum);
                            i++;
                        }
                        catch
                        {
                            //MessageBox.Show("字节越界，请逐个字节输入！", "Error");                          
                        }
                    }

                    serialPort1.Write(sendBuffer, 0, sendBuffer.Length);

                    //更新发送数据计数
                    send_cntr += (UInt32)sendBuffer.Length;
                    lab_send_cntr.Text = send_cntr.ToString();
                   
                }
                catch 
                {
                    MessageBox.Show("当前为16进制发送模式，请输入16进制数据");
                }
            }
   
        }