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到此，相信大家对“C#怎么实现连接电子秤串口自动称重”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
