using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Honeywell1900扫码枪程序触发
{
    public partial class Form1 : Form
    {

        SerialPort serialPort1 = new SerialPort();
        delegate void myDelegate();  //委托，此为重点.
        public Form1()
        {
            InitializeComponent();
        }
        private void button3_Click(object sender, EventArgs e)
        {
            serialPort1 = new SerialPort();
            serialPort1.PortName = comboBox1.Text;

            try
            {
                serialPort1.Open();
                serialPort1.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort1_DataReceived);
            }
            catch (Exception ex)
            {
                label3.ForeColor = Color.Red;
                label3.Text = "打开串口出错";
                //MessageBox.Show("打开串口出错");
            }
            label3.ForeColor = Color.Green;
            label3.Text = "串口已打开";
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.Close();
                label3.ForeColor = Color.Green;
                label3.Text = "关闭串口成功";
                return;
            }
            label3.ForeColor = Color.Black;
            label3.Text = "关闭串口成功";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Byte[] BSendTemp = HexStringToBytes("16 54 0D");
 
            serialPort1.Write(BSendTemp,0,BSendTemp.Length);//发送数据    
 
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Byte[] BSendTemp = HexStringToBytes("16 55 0D");

            this.serialPort1.Write(BSendTemp, 0, BSendTemp.Length);//发送数据    
        }

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            textBox1.BeginInvoke(new myDelegate(updateTextBox));
        }
        public void updateTextBox()
        {
            int len = serialPort1.BytesToRead;
            byte[] sbytes = new byte[len];
            serialPort1.Read(sbytes, 0, len);

            textBox1.Text = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.000")+"扫到码如下：\r\n"+Encoding.UTF8.GetString(sbytes);
        }

        public static byte[] HexStringToBytes(string hs)
        {
            string[] strArr = hs.Trim().Split(' ');
            byte[] b = new byte[strArr.Length];
            //逐个字符变为16进制字节数据
            for (int i = 0; i < strArr.Length; i++)
            {
                b[i] = Convert.ToByte(strArr[i], 16);
            }
            //按照指定编码将字节数组变为字符串
            return b;
        }

        private string receive_data = "";
        private void button6_Click(object sender, EventArgs e)
        {
            receive_data = "34";
        }

        private void button5_Click(object sender, EventArgs e)
        {
            Task.Factory.StartNew(()=> {
                bool ret = TimeoutGetValue(ref receive_data, 4000);
                if (ret)
                {
                    System.Diagnostics.Trace.WriteLine(ret+ receive_data);
                    receive_data = "";
                }
                else
                {
                    System.Diagnostics.Trace.WriteLine("获取超时");
                }
            });
            
        }
        /// <summary>
        /// 用来获取data变量的值，并设置超时时间
        /// </summary>
        /// <param name="data">ref 传递变量</param>
        /// <param name="timeout">超时时间</param>
        /// <returns></returns>
        private bool TimeoutGetValue(ref string data,int timeout)
        {
            int i_count = 0;
            int all_count = timeout / 200;
            while (data.Equals("") && i_count <all_count)
            {
                i_count++;
                Thread.Sleep(200);
            }
            if (data.Equals(""))
            {
                return false;
            }
            else
            {
                return true;
            }
        }
    }
}