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   源码介绍

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        SerialPort sp =null;
        bool isOpen = false;
        bool isSetProperty = false;
        bool isHex = false;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.MaximumSize = this.Size;
            this.MinimumSize = this.Size;
            this.MaximizeBox = false;
            for(int i=0;i<10;i  )
            {
                cbxCOMPort.Items.Add("COM"   (i   1).ToString());
            }
            cbxCOMPort.SelectedIndex = 0;

            cbxBaudRate.Items.Add("1200");
            cbxBaudRate.Items.Add("2400");
            cbxBaudRate.Items.Add("4800");
            cbxBaudRate.Items.Add("9600");
            cbxBaudRate.Items.Add("19200");
            cbxBaudRate.Items.Add("38400");
            cbxBaudRate.Items.Add("43000");
            cbxBaudRate.Items.Add("56000");
            cbxBaudRate.Items.Add("57600");
            cbxBaudRate.Items.Add("115200");
            cbxBaudRate.SelectedIndex = 5;

            cbxStopBits.Items.Add("0");
            cbxStopBits.Items.Add("1");
            cbxStopBits.Items.Add("1.5");
            cbxStopBits.Items.Add("2");
            cbxStopBits.SelectedIndex = 0;

            cbxDataBits.Items.Add("8");
            cbxDataBits.Items.Add("7");
            cbxDataBits.Items.Add("6");
            cbxDataBits.Items.Add("5");
            cbxDataBits.SelectedIndex = 0;


            cbxParitv.Items.Add("无");
            cbxParitv.Items.Add("奇校验");
            cbxParitv.Items.Add("偶校验");
            cbxParitv.SelectedIndex = 0;
            rbnChar.Checked = true;

        }

        private void btnCheckCOM_Click(object sender, EventArgs e)
        {
            bool comExistence = false;
            cbxCOMPort.Items.Clear();
            for(int i=0;i<10;i  )
            {
                try
                {
                    SerialPort sp = new SerialPort("COM"   (i   1).ToString());
                    sp.Open();
                    sp.Close();
                    cbxCOMPort.Items .Add("COM"   (i   1).ToString());
                    comExistence = true;
                }
                catch(Exception)
                {
                    continue;

                }

            }
            if (comExistence)
            {
                cbxCOMPort.SelectedIndex = 0;
            }
            else
            {
                MessageBox.Show("没有找到可用串口", "错我提示");
            }
        }
        private bool CheckPortSetting()
        {
            if (cbxCOMPort.Text.Trim() == "") return false;
            if (cbxBaudRate.Text.Trim() == "") return false;
            if (cbxDataBits.Text.Trim() == "") return false;
            if (cbxParitv.Text.Trim() == "") return false;
            if (cbxStopBits.Text.Trim ()== "") return false;
            return true;
        } 
        private  bool CheckSendData()
        {
            if (tbxSendData.Text.Trim() == "") return false;
            return true;
        }
       /* private  bool SetPortProperty()
        {
            sp = new SerialPort();
            sp.PortName = cbxCOMPort.Text.Trim();
            sp.BaudRate = Convert.Tolnt32(cbxBaudRate.Text.Trim());
            float f = Convert.ToSingle(cbxStopBits.Text.Trim());
            if(f==0)
            {
                sp.StopBits = StopBits.None;
            }
            else if(f==1.5)
            {
                sp.StopBits = StopBits.OnePointFive;
            }
            else if (f == 2)
            {
                sp.StopBits = StopBits.Two;
            }
            else 
            {
                sp.StopBits = StopBits.One;
            }
            sp.DataBits = Convert.Tolnt16(cbxDataBits.Text.Trim());
            string s = cbxParitv.Text.Trim();
            if(s.CompareTo("无")==0)
            {
                sp.Parity = Parity.None;
            }
            else if(s.CompareTo("奇校验")==0)
            {
                sp.Parity = Parity.Odd;
            }
            else if (s.CompareTo("偶校验") == 0)
            {
                sp.Parity = Parity.Even;
            }
            else
            {
                sp.Parity = Parity.None;
            }
            sp.ReadTimeout = -1;
            sp.RtsEnable = true;
            sp.DataReceived  = new SerialDataReceivedEventHandler(sp_DataReceived);
            if(rbnHex.Checked)
            {
                isHex = true;
            }
            else
            {
                isHex = false;
            }
        }*/

        private void btnSend_Click(object sender, EventArgs e)
        {
            if(isOpen)
            {
                try
                {
                    sp.WriteLine(tbxSendData.Text);
                }
                catch(Exception)
                {
                    MessageBox.Show("发送数据时发生错误", "错误提示");
                    return;
                }
            }
            else
            {
                MessageBox.Show("串口未打开！", "错误提示");
                return;
            }
            if(!CheckSendData())
            {
                MessageBox.Show("请输入要发送的数据！", "错误提示");
                return;
            }
        }

        private void btnOpenCom_Click(object sender, EventArgs e)
        {
            if(isOpen==false)
            {
                if(!CheckPortSetting())
                {
                    MessageBox.Show("串口未设置", "错误提示");
                    return;
                }
                if(!isSetProperty)
                {
                    //SetPortProperty();
                    isSetProperty = true;
                }
                try
                {
                    sp.Open();
                    isOpen = true;
                    btnOpenCom.Text = "关闭串口";
                    cbxCOMPort.Enabled = false;
                    cbxBaudRate.Enabled = false;
                    cbxDataBits.Enabled = false;
                    cbxParitv.Enabled = false;
                    cbxStopBits.Enabled = false;
                    rbnChar.Enabled = false;
                    rbnHex.Enabled = false;
                }
                catch (Exception)
                {
                    isSetProperty = false;
                    isOpen = false;
                    MessageBox.Show("串口无效或已被占用", "错误提示");
                }
            }
            else
            {
                try
                {
                    sp.Close();
                    isOpen = false;
                    isSetProperty = false;
                    btnOpenCom.Text = "打开串口";
                    cbxCOMPort.Enabled = true;
                    cbxBaudRate.Enabled = true;
                    cbxDataBits.Enabled = true;
                    cbxParitv.Enabled = true;
                    cbxStopBits.Enabled = true;
                    rbnChar.Enabled = true;
                    rbnHex.Enabled = true;
                }
                catch
                {
               
                }
            }
        }
       /* private void sp_DataRcceived(object sender, SerialDataReceivedEventArgs e)
        {
            System.Threading.Thread.Sleep(100);
           // this Inovke((EventHandler)(delegate
            {
                if (isHex == false)
                {
                    tbxRecvData.Text  = sp.ReadLine();
                }
                else
                {
                    Byte[] ReceivedData = new Byte[sp.BytesToRead];
                    sp.Read(ReceivedData, 0, ReceivedData.Length);
                    String RecvDataText = null;
                    for (int i = 0; i < ReceivedData.Length - 1; i  )
                    {
                        RecvDataText  = ("0x"   ReceivedData[i].ToString("X2")   " ");

                    }
                    tbxRecvData.Text  = RecvDataText;
                }
            sp.DiscardInBuffer();
        }));
        }*/

        private void btnCleanData_Click(object sender, EventArgs e)
        {
            tbxRecvData.Text = "";
            tbxSendData.Text = "";
        }

        private void label4_Click(object sender, EventArgs e)
        {

        }
    }
}