应用SerialPort实现串口扫码枪ST2200操作

来源：互联网发布：超市积分软件多少钱编辑：程序博客网时间：2024/06/09 12:30

引用串口类：System.IO.Ports.SerialPort

直接贴代码：

  /// <summary>    /// 串口 扫描枪    /// </summary>    public class ScanProvider    {        private SerialPort _serialPort;        public ScanProvider(string portName, int baudRate)        {            _serialPort = new SerialPort();            this.RegisterSerialPort(portName, baudRate);            _serialPort.DataReceived +=_serialPort_DataReceived;        }        #region Private Methods        /// <summary>        /// 注册串口        /// </summary>        /// <param name="portName">串口名</param>        /// <param name="baudRate">波特率</param>        private void RegisterSerialPort(string portName, int baudRate)        {            // 串口名            _serialPort.PortName = portName;            // 波特率            _serialPort.BaudRate = baudRate;            // 数据位            _serialPort.DataBits = 8;            // 停止位            _serialPort.StopBits = System.IO.Ports.StopBits.One;            // 无奇偶校验位            _serialPort.Parity = System.IO.Ports.Parity.None;        }        #endregion        #region Public         /// <summary>        /// 是否处于打开状态        /// </summary>        public bool IsOpen        {            get            {                return _serialPort != null && _serialPort.IsOpen;            }        }        /// <summary>        /// 打开串口        /// </summary>        /// <returns></returns>        public bool Open()        {            if (_serialPort == null)                return this.IsOpen;            if (_serialPort.IsOpen)                this.Close();            _serialPort.Open();            return this.IsOpen;        }        /// <summary>        /// 关闭串口        /// </summary>        public void Close()        {            if (this.IsOpen)                _serialPort.Close();        }        /// <summary>        /// 向串口内写入        /// </summary>        /// <param name="send">写入数据</param>        /// <param name="offSet">偏移量</param>        /// <param name="count">写入数量</param>        public void Write(byte[] send, int offSet, int count)        {            if (this.IsOpen)            {                _serialPort.Write(send, offSet, count);            }        }        public void Dispose()        {            if (this._serialPort == null)                return;            if (this._serialPort.IsOpen)                this.Close();            this._serialPort.Dispose();            this._serialPort = null;        }        #endregion        void _serialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)        {            // 等待100ms，防止读取不全的情况            Thread.Sleep(100);            byte[] m_recvBytes = new byte[_serialPort.BytesToRead];//定义缓冲区大小            int result = _serialPort.Read(m_recvBytes, 0, m_recvBytes.Length);//从串口读取数据            if (result <= 0)                return;            string strResult = Encoding.ASCII.GetString(m_recvBytes, 0, m_recvBytes.Length);//对数据进行转换            _serialPort.DiscardInBuffer();            if (this.DataReceived != null)                this.DataReceived(this, new SerialSortEventArgs() { Code = strResult });        }        public event EventHandler<SerialSortEventArgs> DataReceived;        #region Static        /// <summary>        /// 获取可用串口名称        /// </summary>        /// <returns></returns>        public static string[] GetComNames()        {            string[] names = null;            try            {                names = SerialPort.GetPortNames();            }            catch (Exception ex)            {                throw ex;            }            return names;        }        #endregion    }    public class SerialSortEventArgs    {        public string Code { get; set; }    }

应用：

    public partial class MainWindow : Window    {        ScanProvider _scanner;        public MainWindow()        {            InitializeComponent();            // 打开串口            _scanner = new ScanProvider("COM1", 115200);            // 打开串口            if (_scanner.Open())                //关联事件处理程序                _scanner.DataReceived += _scanner_DataReceived;        }        void _scanner_DataReceived(object sender, SerialSortEventArgs e)        {            this.Dispatcher.BeginInvoke(new Action<string>((args) =>                {                    this.txtIDCard.Text = args;                }), e.Code);        }    }

其中波特率根据具体的扫码枪设定。

我的扫码枪型号：ScanHome ST2200 。

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