xicheji/MainForm.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using RestSharp;
using S7.Net;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using System.Threading.Channels;
using System.Windows.Forms;
using static xicheji.CHCNetSDK;

namespace xicheji
{
    public partial class MainForm : Form
    {
        private readonly Config config;

        private static DateTime logDate = DateTime.Now;
        private static StreamWriter logWriter;
        private DateTime lastReceiveTime = DateTime.MinValue;

        private byte[]? currentDataBlock;
        private Plc? plc = null;


        private bool m_bInitSDK = false;
        private bool m_bRecord = false;
        private uint iLastErr = 0;
        private int m_lUserID = -1;
        private int m_lRealHandle = -1;
        private string str1;
        private string str2;
        private int i = 0;
        private int m_lTree = 0;
        private string str;
        private long iSelIndex = 0;
        private uint dwAChanTotalNum = 0;
        private uint dwDChanTotalNum = 0;
        private int m_lPort = -1;
        private IntPtr m_ptrRealHandle;
        private int[] iIPDevID = new int[96];
        private int[] iChannelNum = new int[96];
        private CHCNetSDK.REALDATACALLBACK RealData = null;
        public CHCNetSDK.NET_DVR_DEVICEINFO_V30 DeviceInfo;
        public CHCNetSDK.NET_DVR_IPPARACFG_V40 m_struIpParaCfgV40;
        public CHCNetSDK.NET_DVR_STREAM_MODE m_struStreamMode;
        public CHCNetSDK.NET_DVR_IPCHANINFO m_struChanInfo;
        public CHCNetSDK.NET_DVR_PU_STREAM_URL m_struStreamURL;
        public CHCNetSDK.NET_DVR_IPCHANINFO_V40 m_struChanInfoV40;
        private PlayCtrl.DECCBFUN m_fDisplayFun = null;
        public delegate void MyDebugInfo(string str);

        private readonly List<WashRecord> washRecords = new();
        private string lastCarNo = string.Empty;
        private IFreeSql db;

        public MainForm()
        {
            InitializeComponent();
            config = ConfigHelper.GetConfig();
            logWriter = new StreamWriter(DateTime.Now.ToString("yyyy_MM_dd") + ".log");
            db = new FreeSql.FreeSqlBuilder()
                .UseAutoSyncStructure(true)
                .UseConnectionString(FreeSql.DataType.Sqlite, config.DBString)
                .Build();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            try
            {
                m_bInitSDK = CHCNetSDK.NET_DVR_Init();
                if (m_bInitSDK == false)
                {
                    MessageBox.Show("NET_DVR_Init error!");
                    return;
                }
                else
                {
                    //保存SDK日志 To save the SDK log
                    CHCNetSDK.NET_DVR_SetLogToFile(3, Path.Combine(Directory.GetCurrentDirectory(), "log"), true);

                    for (int i = 0; i < 64; i++)
                    {
                        iIPDevID[i] = -1;
                        iChannelNum[i] = -1;
                    }
                }

                dataGridView1.AutoGenerateColumns = false;
                dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

                #region 测试代码: 表格数据
                washRecords.Add(new WashRecord()
                {
                    DeviceId = "asdf",
                    CarNum = "京123456",
                    StartTime = new DateTime(2024, 6, 1, 12, 00, 00),
                    EndTime = new DateTime(2024, 6, 1, 12, 30, 00),
                    WashTime = 15,
                    DryTime = 15,
                    TotalElectricity = 10,
                    TotalWater = 2,
                    WaterPressure = 6,
                });
                #endregion

                dataGridView1.DataSource = washRecords;

                ConnectPLC();
                ConnectCamera();

                receivePLCTimer.Interval = config.PLCReceiveInterval * 1000;
                receivePLCTimer.Enabled = true;
                uploadTimer.Enabled = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }

        private void btnSetting_Click(object sender, EventArgs e)
        {
            try
            {
                var settingForm = new SettingForm();
                if (settingForm.ShowDialog() == DialogResult.OK)
                {
                    ConnectPLC();
                    ConnectCamera();

                    receivePLCTimer.Enabled = true;
                    uploadTimer.Enabled = true;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }

        private void nowTimer_Tick(object sender, EventArgs e)
        {
            try
            {
                var now = DateTime.Now;
                lblTime.Text = $"{now.Month}月 {now.Day}日  {now.Hour}:{now:mm}:{now:ss}";
            }
            catch { }
        }

        public static void Log(object message)
        {
            if (message == null) return;
            if (DateTime.Now.Date != logDate.Date)
            {
                logDate = DateTime.Now;
                logWriter = new StreamWriter(DateTime.Now.ToString("yyyy_MM_dd") + ".log");
            }

            logWriter.WriteLine(DateTime.Now.ToString("HH:mm:ss:fff> ") + " " + message);
            logWriter.Flush();
        }

        #region 读PLC数据

        private void ConnectPLC()
        {
            plc = new Plc(config.PLCType, config.PLCIP, int.Parse(config.PLCPort), 0, 1);
            plc.Open();

            if (!plc.IsConnected)
            {
                MessageBox.Show("PLC连接失败!");
                return;
            }
        }

        private void receivePLCTimer_Tick(object sender, EventArgs e)
        {
            try
            {
                if (plc == null || !plc.IsConnected)
                {
                    receivePLCTimer.Enabled = false;
                    return;
                }

                ReadPLCData();
            }
            catch (Exception ex)
            {
                receivePLCTimer.Enabled = false;
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }

        private void ReadPLCData()
        {
            currentDataBlock = plc!.ReadBytes(DataType.DataBlock, 1, 0, 100);

            var time = DateTime.Now; //临时代码， 先跳过下面日期报错的
            //var time = new DateTime(
            //    DateTime.Now.Year,
            //    ReadPLCInt("当前月"),
            //    ReadPLCInt("当前日"),
            //    ReadPLCInt("当前时"),
            //    ReadPLCInt("当前分"),
            //    ReadPLCInt("当前秒"));

            var macAddress = ReadMacAddress();
            Log("macAddress: " + macAddress);

            if (string.IsNullOrEmpty(config.PLCMacAddress))
            {
                //第一次配置为空时,更新一下mac地址
                config.PLCMacAddress = macAddress;
            }
            //if (config.PLCMacAddress != macAddress)
            //{
            //    //以后还不匹配就提示
            //    MessageBox.Show("PLC设备Mac地址不匹配,请确认!");
            //    return;
            //}

            if (time <= lastReceiveTime)
            {
                //已经读过这个时间的了
                return;
            }

            db.Insert(new PLCRecord() { Data = currentDataBlock }).ExecuteAffrows();

            lastReceiveTime = time;

            ReadError();
            ReadStatus();

            lblWashCount.Text = ReadPLCString("洗车次数");
            lblTotalWater.Text = ReadPLCString("累计用水量");
            lblTotalElectricity.Text = ReadPLCString("累计用电量");
            //.Text = ReadPLCStringValue("当前流量");
            lblCurrentElectricity.Text = ReadPLCString("当前功率");
            lblCurrentWaterP.Text = ReadPLCString("当前压力");

            var myCrc = CRCCheck(currentDataBlock);
            var readCrc = ReadPLCInt("CRC");
            if (myCrc != readCrc)
            {
                //receivePLCTimer.Enabled = false;
                //MessageBox.Show("CRC不匹配!");
                //return;
            }

            if (ReadPLCInt("最后一次洗车开始月") != 0)
            {
                if (string.IsNullOrEmpty(lastCarNo))
                {
                    receivePLCTimer.Enabled = false;
                    MessageBox.Show("未检测到车牌信息,请检查是否识别正常");
                    return;
                }

                //洗车完成后才有数据的

                var washStartTime = new DateTime(
                    DateTime.Now.Year,
                    ReadPLCInt("最后一次洗车开始月"),
                    ReadPLCInt("最后一次洗车开始日"),
                    ReadPLCInt("最后一次洗车开始时"),
                    ReadPLCInt("最后一次洗车开始分"),
                    ReadPLCInt("最后一次洗车开始秒"));

                var washEndTime = new DateTime(
                    DateTime.Now.Year,
                    ReadPLCInt("最后一次洗车结束月"),
                    ReadPLCInt("最后一次洗车结束日"),
                    ReadPLCInt("最后一次洗车结束时"),
                    ReadPLCInt("最后一次洗车结束分"),
                    ReadPLCInt("最后一次洗车结束秒"));

                var washRecord = new WashRecord()
                {
                    DeviceId = macAddress,
                    CarNum = lastCarNo,
                    StartTime = washStartTime,
                    EndTime = washEndTime,
                    DryTime = ReadPLCInt("最后一次洗车风干时长"),
                    TotalElectricity = ReadPLCInt("最后一次洗车用电"),
                    TotalWater = ReadPLCInt("最后一次洗车用水"),
                    WashTime = ReadPLCInt("最后一次洗车总时长"),
                    WaterPressure = ReadPLCInt("最后一次洗车水压"),
                };

                washRecords.Add(washRecord);

                db.Insert(washRecord).ExecuteAffrows();

                //洗车完成后重置车牌信息
                lastCarNo = string.Empty;
            }
        }

        private static readonly ushort[] crcTable = new ushort[256] {
                0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
                0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
                0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
                0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
                0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
                0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
                0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
                0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
                0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
                0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
                0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
                0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
                0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
                0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
                0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
                0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
                0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
                0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
                0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
                0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
                0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
                0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
                0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
                0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
                0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
                0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
                0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
                0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
                0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
                0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
                0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
                0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
           };

        private static ushort CRCCheck(byte[] data)
        {
            ushort crc = 0xFFFF;

            foreach (byte b in data)
            {
                byte tableIndex = (byte)(((crc >> 8) ^ b) & 0xFF);
                crc = (ushort)((crc << 8) ^ crcTable[tableIndex]);
            }

            return crc;
        }

        private string ReadMacAddress()
        {
            var mac1 = ReadPLCInt("MAC1");
            var mac2 = ReadPLCInt("MAC2");
            var mac3 = ReadPLCInt("MAC3");
            var mac4 = ReadPLCInt("MAC4");
            var mac5 = ReadPLCInt("MAC5");
            var mac6 = ReadPLCInt("MAC6");

            return $"{ConvertMacItem(mac1)}:{ConvertMacItem(mac2)}:{ConvertMacItem(mac3)}:{ConvertMacItem(mac4)}:{ConvertMacItem(mac5)}:{ConvertMacItem(mac6)}";
        }

        private string ConvertMacItem(int value)
        {
            return value.ToString("X").PadLeft(2, '0');
        }

        private void ReadStatus()
        {
            lblStatus.Text = string.Empty;

            var statuses = new List<string>() {
                "洗车中", "清洗中", "沥水中",
                "出车中", "风干中"};

            foreach (var status in statuses)
            {
                if (ReadPLCBool(status))
                {
                    lblStatus.Text = status;
                    break;
                }
            }
        }

        private void ReadError()
        {
            lblError.Text = string.Empty;

            var errors = new List<string>() {
                "急停", "冲洗泵故障", "反洗泵故障",
                "清淤泵故障", "伴热故障", "风刀故障" };

            foreach (var error in errors)
            {
                if (ReadPLCBool(error))
                {
                    lblError.Text = error;
                    break;
                }
            }
        }

        private string ReadPLCString(string name)
        {
            var variable = ConfigHelper.FindVariable(name);
            if (variable == null || currentDataBlock == null)
                return string.Empty;

            ParsePLCKey(variable.Key, out _, out _, out var varType, out var address, out var bitNumber);
            if (varType == VarType.DWord)
            {
                var value = S7.Net.Types.DWord.FromByteArray(currentDataBlock.Take(new Range(address, address + 4)).ToArray());
                return $"{value} {variable.Desc}".TrimEnd();
            }
            else if (varType == VarType.Word)
            {
                var value = S7.Net.Types.Word.FromByteArray(currentDataBlock.Take(new Range(address, address + 2)).ToArray());
                return $"{value} {variable.Desc}".TrimEnd();
            }
            else if (varType == VarType.Byte)
            {
                var value = S7.Net.Types.Byte.FromByteArray(currentDataBlock.Take(new Range(address, address + 1)).ToArray());
                return $"{value} {variable.Desc}".TrimEnd();
            }
            return string.Empty;
        }

        private int ReadPLCInt(string name)
        {
            var variable = ConfigHelper.FindVariable(name);
            if (variable == null || currentDataBlock == null)
                return 0;

            ParsePLCKey(variable.Key, out var dataType, out var dbNumber, out var varType, out var address, out var bitNumber);
            if (varType == VarType.DWord)
            {
                var value = S7.Net.Types.DWord.FromByteArray(currentDataBlock.Take(new Range(address, address + 4)).ToArray());
                return (int)value;
            }
            else if (varType == VarType.Word)
            {
                var value = S7.Net.Types.Word.FromByteArray(currentDataBlock.Take(new Range(address, address + 2)).ToArray());
                return value;
            }
            else if (varType == VarType.Byte)
            {
                var value = S7.Net.Types.Byte.FromByteArray(currentDataBlock.Take(new Range(address, address + 1)).ToArray());
                return value;
            }
            return 0;
        }

        private bool ReadPLCBool(string name)
        {
            var variable = ConfigHelper.FindVariable(name);
            if (variable == null || currentDataBlock == null)
                return false;

            ParsePLCKey(variable.Key, out _, out _, out _, out var address, out var bitNumber);
            var value = S7.Net.Types.Boolean.GetValue(currentDataBlock[address], bitNumber);
            return value;
        }

        private static void ParsePLCKey(string plcKey, out DataType dataType, out int dbNumber, out VarType varType, out int address, out int bitNumber)
        {
            bitNumber = -1;
            dbNumber = 0;

            switch (plcKey.Substring(0, 2))
            {
                case "DB":
                    string[] strings = plcKey.Split(new char[] { '.' });
                    if (strings.Length < 2)
                        throw new InvalidAddressException("To few periods for DB address");

                    dataType = DataType.DataBlock;
                    dbNumber = int.Parse(strings[0].Substring(2));
                    address = int.Parse(strings[1].Substring(3));

                    string dbType = strings[1].Substring(0, 3);
                    switch (dbType)
                    {
                        case "DBB":
                            varType = VarType.Byte;
                            return;
                        case "DBW":
                            varType = VarType.Word;
                            return;
                        case "DBD":
                            varType = VarType.DWord;
                            return;
                        case "DBX":
                            bitNumber = int.Parse(strings[2]);
                            if (bitNumber > 7)
                                throw new InvalidAddressException("Bit can only be 0-7");
                            varType = VarType.Bit;
                            return;
                        default:
                            throw new InvalidAddressException();
                    }
                case "IB":
                case "EB":
                    // Input byte
                    dataType = DataType.Input;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.Byte;
                    return;
                case "IW":
                case "EW":
                    // Input word
                    dataType = DataType.Input;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.Word;
                    return;
                case "ID":
                case "ED":
                    // Input double-word
                    dataType = DataType.Input;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.DWord;
                    return;
                case "QB":
                case "AB":
                case "OB":
                    // Output byte
                    dataType = DataType.Output;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.Byte;
                    return;
                case "QW":
                case "AW":
                case "OW":
                    // Output word
                    dataType = DataType.Output;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.Word;
                    return;
                case "QD":
                case "AD":
                case "OD":
                    // Output double-word
                    dataType = DataType.Output;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.DWord;
                    return;
                case "MB":
                    // Memory byte
                    dataType = DataType.Memory;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.Byte;
                    return;
                case "MW":
                    // Memory word
                    dataType = DataType.Memory;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.Word;
                    return;
                case "MD":
                    // Memory double-word
                    dataType = DataType.Memory;
                    dbNumber = 0;
                    address = int.Parse(plcKey.Substring(2));
                    varType = VarType.DWord;
                    return;
                default:
                    switch (plcKey.Substring(0, 1))
                    {
                        case "E":
                        case "I":
                            // Input
                            dataType = DataType.Input;
                            varType = VarType.Bit;
                            break;
                        case "Q":
                        case "A":
                        case "O":
                            // Output
                            dataType = DataType.Output;
                            varType = VarType.Bit;
                            break;
                        case "M":
                            // Memory
                            dataType = DataType.Memory;
                            varType = VarType.Bit;
                            break;
                        case "T":
                            // Timer
                            dataType = DataType.Timer;
                            dbNumber = 0;
                            address = int.Parse(plcKey.Substring(1));
                            varType = VarType.Timer;
                            return;
                        case "Z":
                        case "C":
                            // Counter
                            dataType = DataType.Counter;
                            dbNumber = 0;
                            address = int.Parse(plcKey.Substring(1));
                            varType = VarType.Counter;
                            return;
                        default:
                            throw new InvalidAddressException(string.Format("{0} is not a valid address", plcKey.Substring(0, 1)));
                    }

                    string txt2 = plcKey.Substring(1);
                    if (txt2.IndexOf(".") == -1)
                        throw new InvalidAddressException("To few periods for DB address");

                    address = int.Parse(txt2.Substring(0, txt2.IndexOf(".")));
                    bitNumber = int.Parse(txt2.Substring(txt2.IndexOf(".") + 1));
                    if (bitNumber > 7)
                        throw new InvalidAddressException("Bit can only be 0-7");
                    return;
            }
        }

        #endregion

        #region 上传到洗车平台

        private async void uploadTimer_Tick(object sender, EventArgs e)
        {
            try
            {
                await UploadPlatform();
            }
            catch (Exception ex)
            {
                uploadTimer.Enabled = false;
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }

        private async Task UploadPlatform()
        {
            var restClient = new RestClient(config.Server);
            var request = new RestRequest("cyft/common/carWashRecord", Method.Post);
            // 测试代码
            WashRecord washRecord = new WashRecord();
            var jsonBody = new
            {
                deviceId = washRecord.DeviceId, //洗车机器mac地址
                carNo = washRecord.CarNum, //车牌号码
                beginTime = washRecord.StartTime.ToString("yyyy-MM-dd HH:mm:ss"), //洗车开始时间
                endTime = washRecord.EndTime.ToString("yyyy-MM-dd HH:mm:ss"), //洗车结束时间
                washTime = washRecord.WashTime, //洗车时长(s)
                widnowsDefender = washRecord.TotalWater, //用水量(t)
                waterPressure = washRecord.WaterPressure, //压力(MPa)
                picBase64 = ImageToBase64(pbCamera.Image, ImageFormat.Jpeg), //洗车图片base64
            };
            request.AddParameter("application/json", JsonConvert.SerializeObject(jsonBody), ParameterType.RequestBody);
            var response = await restClient.ExecuteAsync(request);
            if (response == null) return;
        }

        #endregion

        #region 摄像头

        private void btnConnectCamera_Click(object sender, EventArgs e)
        {
            try
            {
                ConnectCamera();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }

        private void ConnectCamera()
        {
            try
            {
                cboCameraChannel.DisplayMember = "Display";
                cboCameraChannel.ValueMember = "Value";
                cboCameraChannel.Items.Clear();

                //登录设备 Login the device
                m_lUserID = CHCNetSDK.NET_DVR_Login_V30(config.CameraIP, int.Parse(config.CameraPort),
                    config.CameraUserName, config.CameraPassword, ref DeviceInfo);
                if (m_lUserID < 0)
                {
                    var iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    var errMsg = "NET_DVR_Login_V30 failed, error code= " + iLastErr; //登录失败，输出错误号 Failed to login and output the error code
                    MessageBox.Show(errMsg);
                    return;
                }
                else
                {
                    //登录成功
                    Log("NET_DVR_Login_V30 succ!");

                    dwAChanTotalNum = (uint)DeviceInfo.byChanNum;
                    dwDChanTotalNum = (uint)DeviceInfo.byIPChanNum + 256 * (uint)DeviceInfo.byHighDChanNum;
                    if (dwDChanTotalNum > 0)
                    {
                        InfoIPChannel();
                    }
                    else
                    {
                        for (var i = 0; i < dwAChanTotalNum; i++)
                        {
                            ListAnalogChannel(i + 1, 1);
                            iChannelNum[i] = i + (int)DeviceInfo.byStartChan;
                        }

                        //comboBoxView.SelectedItem = 1;
                        // MessageBox.Show("This device has no IP channel!");
                    }
                }

                if (cboCameraChannel.Items.Count > 0 && cboCameraChannel.SelectedIndex == -1)
                {
                    cboCameraChannel.SelectedIndex = 0;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }

        public void InfoIPChannel()
        {
            uint dwSize = (uint)Marshal.SizeOf(m_struIpParaCfgV40);

            IntPtr ptrIpParaCfgV40 = Marshal.AllocHGlobal((Int32)dwSize);
            Marshal.StructureToPtr(m_struIpParaCfgV40, ptrIpParaCfgV40, false);

            uint dwReturn = 0;
            int iGroupNo = 0;  //该Demo仅获取第一组64个通道，如果设备IP通道大于64路，需要按组号0~i多次调用NET_DVR_GET_IPPARACFG_V40获取

            if (!CHCNetSDK.NET_DVR_GetDVRConfig(m_lUserID, CHCNetSDK.NET_DVR_GET_IPPARACFG_V40, iGroupNo, ptrIpParaCfgV40, dwSize, ref dwReturn))
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_GET_IPPARACFG_V40 failed, error code= " + iLastErr;
                //获取IP资源配置信息失败，输出错误号 Failed to get configuration of IP channels and output the error code
                Log(str);
            }
            else
            {
                Log("NET_DVR_GET_IPPARACFG_V40 succ!");

                m_struIpParaCfgV40 = (CHCNetSDK.NET_DVR_IPPARACFG_V40)Marshal.PtrToStructure(ptrIpParaCfgV40, typeof(CHCNetSDK.NET_DVR_IPPARACFG_V40));

                for (var i = 0; i < dwAChanTotalNum; i++)
                {
                    ListAnalogChannel(i + 1, m_struIpParaCfgV40.byAnalogChanEnable[i]);
                    iChannelNum[i] = i + (int)DeviceInfo.byStartChan;
                }

                byte byStreamType = 0;
                uint iDChanNum = 64;

                if (dwDChanTotalNum < 64)
                {
                    iDChanNum = dwDChanTotalNum; //如果设备IP通道小于64路，按实际路数获取
                }

                for (var i = 0; i < iDChanNum; i++)
                {
                    iChannelNum[i + dwAChanTotalNum] = i + (int)m_struIpParaCfgV40.dwStartDChan;
                    byStreamType = m_struIpParaCfgV40.struStreamMode[i].byGetStreamType;

                    dwSize = (uint)Marshal.SizeOf(m_struIpParaCfgV40.struStreamMode[i].uGetStream);
                    switch (byStreamType)
                    {
                        //目前NVR仅支持直接从设备取流 NVR supports only the mode: get stream from device directly
                        case 0:
                            IntPtr ptrChanInfo = Marshal.AllocHGlobal((Int32)dwSize);
                            Marshal.StructureToPtr(m_struIpParaCfgV40.struStreamMode[i].uGetStream, ptrChanInfo, false);
                            m_struChanInfo = (CHCNetSDK.NET_DVR_IPCHANINFO)Marshal.PtrToStructure(ptrChanInfo, typeof(CHCNetSDK.NET_DVR_IPCHANINFO));

                            //列出IP通道 List the IP channel
                            ListIPChannel(i + 1, m_struChanInfo.byEnable, m_struChanInfo.byIPID);
                            iIPDevID[i] = m_struChanInfo.byIPID + m_struChanInfo.byIPIDHigh * 256 - iGroupNo * 64 - 1;

                            Marshal.FreeHGlobal(ptrChanInfo);
                            break;
                        case 4:
                            IntPtr ptrStreamURL = Marshal.AllocHGlobal((Int32)dwSize);
                            Marshal.StructureToPtr(m_struIpParaCfgV40.struStreamMode[i].uGetStream, ptrStreamURL, false);
                            m_struStreamURL = (CHCNetSDK.NET_DVR_PU_STREAM_URL)Marshal.PtrToStructure(ptrStreamURL, typeof(CHCNetSDK.NET_DVR_PU_STREAM_URL));

                            //列出IP通道 List the IP channel
                            ListIPChannel(i + 1, m_struStreamURL.byEnable, m_struStreamURL.wIPID);
                            iIPDevID[i] = m_struStreamURL.wIPID - iGroupNo * 64 - 1;

                            Marshal.FreeHGlobal(ptrStreamURL);
                            break;
                        case 6:
                            IntPtr ptrChanInfoV40 = Marshal.AllocHGlobal((Int32)dwSize);
                            Marshal.StructureToPtr(m_struIpParaCfgV40.struStreamMode[i].uGetStream, ptrChanInfoV40, false);
                            m_struChanInfoV40 = (CHCNetSDK.NET_DVR_IPCHANINFO_V40)Marshal.PtrToStructure(ptrChanInfoV40, typeof(CHCNetSDK.NET_DVR_IPCHANINFO_V40));

                            //列出IP通道 List the IP channel
                            ListIPChannel(i + 1, m_struChanInfoV40.byEnable, m_struChanInfoV40.wIPID);
                            iIPDevID[i] = m_struChanInfoV40.wIPID - iGroupNo * 64 - 1;

                            Marshal.FreeHGlobal(ptrChanInfoV40);
                            break;
                        default:
                            break;
                    }
                }
            }
            Marshal.FreeHGlobal(ptrIpParaCfgV40);

        }
        public void ListIPChannel(int iChanNo, byte byOnline, int byIPID)
        {
            str1 = String.Format("通道 {0}", iChanNo);
            m_lTree++;

            if (byIPID == 0)
            {
                str2 = "空闲"; //通道空闲，没有添加前端设备 the channel is idle                  
            }
            else
            {
                if (byOnline == 0)
                {
                    str2 = "离线"; //通道不在线 the channel is off-line
                }
                else
                    str2 = "在线"; //通道在线 The channel is on-line
            }

            cboCameraChannel.Items.Add(new
            {
                Display = $"{str1}: {str2}",
                Value = iChanNo,
            });
        }
        public void ListAnalogChannel(int iChanNo, byte byEnable)
        {
            str1 = String.Format("通道 {0}", iChanNo);
            m_lTree++;

            if (byEnable == 0)
            {
                str2 = "禁用"; //通道已被禁用 This channel has been disabled               
            }
            else
            {
                str2 = "启用"; //通道处于启用状态 This channel has been enabled
            }

            cboCameraChannel.Items.Add(new
            {
                Display = $"{str1}: {str2}",
                Value = iChanNo,
            });
        }

        private void cboCameraChannel_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                //停止预览 Stop live view 
                if (!CHCNetSDK.NET_DVR_StopRealPlay(m_lRealHandle))
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "NET_DVR_StopRealPlay failed, error code= " + iLastErr;
                    Log(str);
                }

                Log("NET_DVR_StopRealPlay succ!");
                m_lRealHandle = -1;
                pbCamera.Invalidate();//刷新窗口 refresh the window



                iSelIndex = cboCameraChannel.SelectedIndex;
                //hikApi?.PlaybackService.StartPlayBack(channelNumber, pbCamera.Handle);
                CHCNetSDK.NET_DVR_PREVIEWINFO lpPreviewInfo = new CHCNetSDK.NET_DVR_PREVIEWINFO();
                lpPreviewInfo.hPlayWnd = pbCamera.Handle;//预览窗口 live view window
                lpPreviewInfo.lChannel = iChannelNum[(int)iSelIndex];//预览的设备通道 the device channel number
                lpPreviewInfo.dwStreamType = 0;//码流类型：0-主码流，1-子码流，2-码流3，3-码流4，以此类推
                lpPreviewInfo.dwLinkMode = 0;//连接方式：0- TCP方式，1- UDP方式，2- 多播方式，3- RTP方式，4-RTP/RTSP，5-RSTP/HTTP 
                lpPreviewInfo.bBlocked = true; //0- 非阻塞取流，1- 阻塞取流
                lpPreviewInfo.dwDisplayBufNum = 15; //播放库显示缓冲区最大帧数

                IntPtr pUser = IntPtr.Zero;//用户数据 user data 

                //打开预览 Start live view 
                m_lRealHandle = CHCNetSDK.NET_DVR_RealPlay_V40(m_lUserID, ref lpPreviewInfo, null/*RealData*/, pUser);

                if (m_lRealHandle < 0)
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "NET_DVR_RealPlay_V40 failed, error code= " + iLastErr; //预览失败，输出错误号 failed to start live view, and output the error code.
                    Log(str);
                    pbCamera.Invalidate();//刷新窗口 refresh the window
                    return;
                }
                else
                {
                    //预览成功
                    Log("NET_DVR_RealPlay_V40 succ!");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + ex.StackTrace);
            }
        }
        #endregion

        #region 服务接口回调->更新汽车信息


        #endregion

        #region Image <-> Base64

        public static Image Base64ToImage(string base64String)
        {
            byte[] imageBytes = Convert.FromBase64String(base64String);
            using var ms = new MemoryStream(imageBytes, 0, imageBytes.Length);
            ms.Write(imageBytes, 0, imageBytes.Length);
            Image image = Image.FromStream(ms, true);
            return image;
        }

        public static string ImageToBase64(Image image, ImageFormat format)
        {
            if (image == null) return string.Empty;

            using var memoryStream = new MemoryStream();
            image.Save(memoryStream, format);
            var imageBytes = memoryStream.ToArray();
            return Convert.ToBase64String(imageBytes);
        }

        #endregion
    }
}