using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Threading; using System.IO.Ports; namespace GuestRegistration { public partial class frmGustReg : Form { public frmGustReg() { InitializeComponent(); } private void frmGustReg_Load(object sender, EventArgs e) { } //private void btnGetACNo_Click(object sender, EventArgs e) //{ // serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived); //} //string data = string.Empty; //private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) //{ // data = serialPort1.ReadLine().ToString().Trim(); // txtAccessCardNo.Text = data; //} SerialPort serialPort; private void btnGetACNo_Click(object sender, EventArgs e) { serialPort = new SerialPort(); serialPort.PortName = "COM1"; serialPort.BaudRate = 9600; serialPort.DataBits = 8; serialPort.Parity = Parity.None; serialPort.StopBits = StopBits.One; //serialPort.Handshake = Handshake.None; serialPort.Open(); // Thread.Sleep(500); //string data1 = serialPort.ReadLine(); serialPort1.ReadTimeout = 2000; serialPort.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); //sp_DataReceived(this , null); serialPort.Close(); } string data = string.Empty; private delegate void SetTextDeleg(string text); void sp_DataReceived(object sender, SerialDataReceivedEventArgs e) { Thread.Sleep(500); data = serialPort.ReadLine(); //data = serialPort.ReadExisting(); this.BeginInvoke(new SetTextDeleg(si_DataReceived), new object[ ] { data }); } private void si_DataReceived(string data) { txtAccessCardNo.Text = data.Trim(); } } }
var
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