C#怎么实现连接电子秤串口自动称重

本篇内容主要讲解“C#怎么实现连接电子秤串口自动称重”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“C#怎么实现连接电子秤串口自动称重”吧!

一、界面设计

二、核心代码

        private SerialPort com;        private void FormCheck_Load(object sender, EventArgs e)        {            //初始化COMList            initCOMList();             }        #region        private void initCOMList()        {            ManageCOM com = new ManageCOM();            List<string> s = com.AutoGetCOM();            string[] comNames = s.ToArray();            comboxCOM.Items.Clear();            comboxCOM.Items.Add("请选择COM");            comboxCOM.SelectedIndex = 0;            foreach (string portName in comNames)            {                //添加COM口到界面下拉框                comboxCOM.Items.Add(portName);            }        }        #endregion        private void btnStart_Click(object sender, EventArgs e)        {            getWeightfromCOM();        }        #region        private void getWeightfromCOM()        {            int selectIndex= comboxCOM.SelectedIndex;            if (selectIndex!=0)            {                string COM = comboxCOM.Items[selectIndex].ToString();                com = new SerialPort(COM);       //实例化SerialPort并设置COM口                com.BaudRate = 9600;//波特率                com.Parity = Parity.None;//无奇偶校验位                com.StopBits = StopBits.Two;//两个停止位                com.Handshake = Handshake.RequestToSend;//控制协议                com.ReceivedBytesThreshold = 13;//设置 DataReceived 事件发生前内部输入缓冲区中的字节数,我这里是13字节为一组                com.Open();                 //打开串口                  com.DataReceived += new SerialDataReceivedEventHandler(Com_DataReceived);           //接受数据线程            }            else            {                MessageBox.Show("请选择COM");            }                    }        /// <summary>        /// 监听串口数据线程        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void Com_DataReceived(object sender, SerialDataReceivedEventArgs e)        {            Thread.Sleep(500);//线程休眠500毫秒，方便接收串口的全部数据            try            {                if (com.IsOpen)                {                    byte[] readBuffer = new byte[com.ReadBufferSize + 1];                    try                    {                        int count = com.Read(readBuffer, 0, com.ReadBufferSize);        //读取串口数据(监听)                        String SerialIn = System.Text.Encoding.ASCII.GetString(readBuffer, 0, count);//将字节数组解码为字符串                        if (count != 0)                        {                            //这里强调一下,线程里不可以直接对UI进行赋值，只能使用委托操作控件                            this.BeginInvoke(new System.Threading.ThreadStart(delegate ()                            {                                rbResult.Text = SerialIn;                            }));                        }                    }                    catch (TimeoutException) { }                }                else                {                    TimeSpan waitTime = new TimeSpan(0, 0, 0, 0, 50);                    Thread.Sleep(waitTime);                }            }            catch (Exception ex)            {                MessageBox.Show(ex.ToString());            }        }        #endregion

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