using MvCodeReaderSDKNet; 
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;

namespace IDHIKCamera
{
    public class IDHIK
    {
        private IDHIK() { }

        private static IDHIK instance = null;
        public static IDHIK Instance
        {
            get
            {
                if (instance == null)
                {
                    instance = new IDHIK();
                }

                return instance;
            }
        }

        protected string[] _name;
        public string _errInfo;
        protected int _count;
        protected bool[] _isOpen;
        public List<string> cameraName = new List<string>();
        public bool DrawLine = true;

        /// <summary>
        /// 当前相机
        /// </summary>
        private MvCodeReader[] cameraCurr;
        /// <summary>
        /// 所有相机列表
        /// </summary>
        private MvCodeReader.MV_CODEREADER_DEVICE_INFO_LIST cameraAll;

        private bool LoadOk = false;

        public bool Load()
        {
            if (LoadOk)
            {
                return true;
            }

            try
            {
                LoadOk = true;
                cameraAll = new MvCodeReader.MV_CODEREADER_DEVICE_INFO_LIST();
                cameraAll.nDeviceNum = 0;
                int nRet = MvCodeReader.MV_CODEREADER_EnumDevices_NET(ref cameraAll, MvCodeReader.MV_CODEREADER_GIGE_DEVICE);
                if (0 != nRet)
                {
                    SetErrorMsg("Load failed", nRet);
                    LibLogUtil.Error("IDHIK   Load camera error : " + _errInfo);
                    return false;
                }

                cameraName = new List<string>();

                string strUserDefinedName = "";
                for (int i = 0; i < cameraAll.nDeviceNum; i++)
                {
                    MvCodeReader.MV_CODEREADER_DEVICE_INFO stDevInfo = (MvCodeReader.MV_CODEREADER_DEVICE_INFO)Marshal.PtrToStructure(cameraAll.pDeviceInfo[i], typeof(MvCodeReader.MV_CODEREADER_DEVICE_INFO));
                    if (stDevInfo.nTLayerType == MvCodeReader.MV_CODEREADER_GIGE_DEVICE)
                    {
                        IntPtr buffer = Marshal.UnsafeAddrOfPinnedArrayElement(stDevInfo.SpecialInfo.stGigEInfo, 0);
                        MvCodeReader.MV_CODEREADER_GIGE_DEVICE_INFO stGigEDeviceInfo = (MvCodeReader.MV_CODEREADER_GIGE_DEVICE_INFO)Marshal.PtrToStructure(buffer, typeof(MvCodeReader.MV_CODEREADER_GIGE_DEVICE_INFO));
                        string name = "";
                        if (stGigEDeviceInfo.chUserDefinedName != "")
                        {
                            byte[] byteUserDefinedName = Encoding.GetEncoding("GB2312").GetBytes(stGigEDeviceInfo.chUserDefinedName);
                            bool bIsValidUTF8 = IsTextUTF8(byteUserDefinedName);
                            if (bIsValidUTF8)
                            {
                                strUserDefinedName = Encoding.UTF8.GetString(byteUserDefinedName);
                            }
                            else
                            {
                                strUserDefinedName = Encoding.GetEncoding("GB2312").GetString(byteUserDefinedName);
                            }
                            name = "GEV: " + strUserDefinedName + " (" + stGigEDeviceInfo.chSerialNumber + ")";

                        }
                        else
                        {
                            name = stGigEDeviceInfo.chModelName + " (" + stGigEDeviceInfo.chSerialNumber + ")";
                        }
                        if (name.Contains("ID"))
                        {
                            LibLogUtil.Info("IDHIK 加载到相机：" + name);
                        }
                        else
                        {

                            LibLogUtil.Info("IDHIK 加载到相机：" + name + ",非ID相机");
                        }
                        cameraName.Add(name);
                    }
                }

                _name = cameraName.ToArray();
                _count = cameraName.Count;
                _isOpen = new bool[_count];

                cameraCurr = new MvCodeReader[_count];
                SetErrorMsg("Load OK");
                LibLogUtil.Info("IDHIK 加载完成，共" + _count + "个相机：");

                return true;
            }
            catch (Exception ex)
            {
                SetErrorMsg(ex.Message);
                return false;
            }
        }

        public bool OpenAll()
        {
            lock (cameraCurr)
            {
                bool rtn = true;
                for (int i = 0; i < cameraName.Count; i++)
                {
                    rtn = Open(i);
                    if (!rtn) break;
                }
                return rtn;
            }
        }

        public   bool Open(string name)
        {
            int n = cameraName.FindIndex(s => s == name);
            if (n == -1)
            {
                SetErrorMsg(name + " Not find", n);
                return false;
            }
            else
                return Open(n);
        }
        public bool Open(int index)
        {
            lock (cameraCurr)
            {
                //   _index = index;
                if (index < 0 || index >= _count)
                {
                    SetErrorMsg("Not find index :" + index);
                    LibLogUtil.Error("open camera " + index + " error : " + _errInfo);
                    return false;
                }
                if (cameraCurr[index] != null) Close(index);

                try
                {
                    MvCodeReader.MV_CODEREADER_DEVICE_INFO stDevInfo = (MvCodeReader.MV_CODEREADER_DEVICE_INFO)Marshal.PtrToStructure(cameraAll.pDeviceInfo[index], typeof(MvCodeReader.MV_CODEREADER_DEVICE_INFO));
                    cameraCurr[index] = new MvCodeReader();

                    int nRet = cameraCurr[index].MV_CODEREADER_CreateHandle_NET(ref stDevInfo);
                    if (nRet != MvCodeReader.MV_CODEREADER_OK)
                    {
                        SetErrorMsg("open camera " + index + " error MV_CODEREADER_CreateHandle_NET fail : ", nRet);
                        return false;
                    }
                    nRet = cameraCurr[index].MV_CODEREADER_OpenDevice_NET();
                    if (MvCodeReader.MV_CODEREADER_OK != nRet)
                    {
                        cameraCurr[index].MV_CODEREADER_DestroyHandle_NET();
                        SetErrorMsg("open camera " + index + " error MV_CODEREADER_OpenDevice_NET fail : ", nRet);
                        return false;
                    }

                    // ch:设置采集连续模式 | en:Set Continues Aquisition Mode
                    cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("TriggerMode", (uint)MvCodeReader.MV_CODEREADER_TRIGGER_MODE.MV_CODEREADER_TRIGGER_MODE_OFF);
                    _isOpen[index] = true;
                    SetErrorMsg("OK");
                    LibLogUtil.Info("open camera " + index + " " + _errInfo);
                    return true;
                }
                catch (Exception ex)
                {
                    LibLogUtil.Error("打开相机出错：" + ex.ToString());
                    SetErrorMsg(ex.Message);
                    return false;
                }
            }
        }

        public bool Open_AddParameter(int index)
        {
            lock (cameraCurr)
            {
                //   _index = index;
                if (index < 0 || index >= _count)
                {
                    SetErrorMsg("Not find index :" + index);
                    LibLogUtil.Error("open camera " + index + " error : " + _errInfo);
                    return false;
                }
                if (cameraCurr[index] != null) Close(index);

                try
                {
                    MvCodeReader.MV_CODEREADER_DEVICE_INFO stDevInfo = (MvCodeReader.MV_CODEREADER_DEVICE_INFO)Marshal.PtrToStructure(cameraAll.pDeviceInfo[index], typeof(MvCodeReader.MV_CODEREADER_DEVICE_INFO));
                    cameraCurr[index] = new MvCodeReader();

                    int nRet = cameraCurr[index].MV_CODEREADER_CreateHandle_NET(ref stDevInfo);
                    if (nRet != MvCodeReader.MV_CODEREADER_OK)
                    {
                        SetErrorMsg("open camera " + index + " error MV_CODEREADER_CreateHandle_NET fail : ", nRet);
                        return false;
                    }
                    nRet = cameraCurr[index].MV_CODEREADER_OpenDevice_NET();
                    if (MvCodeReader.MV_CODEREADER_OK != nRet)
                    {
                        cameraCurr[index].MV_CODEREADER_DestroyHandle_NET();
                        SetErrorMsg("open camera " + index + " error MV_CODEREADER_OpenDevice_NET fail : ", nRet);
                        return false;
                    }
                    //1.相机修改为相机修改normal模式
                    var RunningMode = cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("RunningMode", 0);
                    LibLogUtil.Info($"设置为normal模式为：{RunningMode}");
                    //2.设置为触发模式
                    var tggerMode = cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("tggerMode", 0);
                    LibLogUtil.Info($"设置为触发模式为：{tggerMode}");
                    //3.设置为软触发
                    var TriggerMode = cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("TriggerMode", 1);
                    LibLogUtil.Info($"设置为软触发模式为：{TriggerMode}");
                    //4.设置软触发源
                    var TriggerSource = cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("TriggerSource", 7);
                    LibLogUtil.Info($"设置为软触发源：{TriggerSource}");
                    //5.设置拍照张数
                    var AcquisitionBurstFrameCount = cameraCurr[index].MV_CODEREADER_SetIntValue_NET("AcquisitionBurstFrameCount", 5);
                    LibLogUtil.Info($"设置拍照张数：{AcquisitionBurstFrameCount}");
                    //6.设置图片压缩比例
                    var JpgQuality = cameraCurr[index].MV_CODEREADER_SetIntValue_NET("JpgQuality", 50);
                    LibLogUtil.Info($"设置图片压缩比例：{JpgQuality}");
                    //ch:设置采集连续模式 | en:Set Continues Aquisition Mode
                    //cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("TriggerMode", (uint)MvCodeReader.MV_CODEREADER_TRIGGER_MODE.MV_CODEREADER_TRIGGER_MODE_OFF);
                    _isOpen[index] = true;
                    SetErrorMsg("OK");
                    LibLogUtil.Info("open camera " + index + " " + _errInfo);
                    return true;
                }
                catch (Exception ex)
                {
                    LibLogUtil.Error("打开相机出错：" + ex.ToString());
                    SetErrorMsg(ex.Message);
                    return false;
                }
            }
        }
        public Image GrabOne_AddParameter(int index, out List<CodeInfo> codeInfos)
        {
            codeInfos = new List<CodeInfo>();
            if (cameraCurr[index] == null || ((!_isOpen[index])))
            {
                bool result = Open(index);
                if (!result)
                {
                    return null;
                }
            }
            if (cameraCurr[index] == null)
            {
                SetErrorMsg("Camera null");
                return null;
            }
            try
            {
                return ImageCapture(index, out codeInfos);
            }
            catch (Exception ex)
            {
                SetErrorMsg(ex.Message);
                return null;
            }
            finally
            {
                if (cameraCurr[index] != null)
                {
                    cameraCurr[index].MV_CODEREADER_StopGrabbing_NET();

                    var LineSelector=cameraCurr[index].MV_CODEREADER_SetEnumValue_NET("LineSelector",5);
                    LibLogUtil.Info($"前置条件：{LineSelector}");
                    var LineInverter=cameraCurr[index].MV_CODEREADER_SetBoolValue_NET("LineInverter", false);
                    LibLogUtil.Info($"关闭光源：{LineInverter}");
                }
                //Task.Run(() => { IDHIK.Instance.Close(index); Thread.Sleep(500); IDHIK.Instance.Open(index); });
            }
        }
        public   void Close(int index)
        {
            lock (cameraCurr)
            {
                if (cameraCurr[index] != null)
                {
                    LibLogUtil.Info($"  close  camer  [{index}] ");
                    _isOpen[index] = false;
                    cameraCurr[index].MV_CODEREADER_CloseDevice_NET();
                    cameraCurr[index].MV_CODEREADER_DestroyHandle_NET();
                    cameraCurr[index] = null;
                }
            }
        }
        public void Close(string name)
        {
            lock (cameraCurr)
            {
                int index = cameraName.FindIndex(s => s == name);
                if (index == -1)
                {
                    SetErrorMsg($"name {name} Not find");
                    return;
                }
                if (cameraCurr[index] != null)
                {
                    LibLogUtil.Info($"  close  camera [{name}] [{index}] ");
                    _isOpen[index] = false;
                    cameraCurr[index].MV_CODEREADER_CloseDevice_NET();
                    cameraCurr[index].MV_CODEREADER_DestroyHandle_NET();
                    cameraCurr[index] = null;
                }
            }
        }
        public void CloseAll()
        {

            if (cameraCurr == null)
                return;
            lock (cameraCurr)
            {
                LibLogUtil.Info("   cameraCurr.Length : " + cameraCurr.Length.ToString());
                for (int i = 0; i < cameraCurr.Length; i++)
                {
                    if (cameraCurr[i] != null)
                    {
                        LibLogUtil.Info($"  close  cameraCurr[{i}]  ");
                        _isOpen[i] = false;
                        cameraCurr[i].MV_CODEREADER_CloseDevice_NET();
                        cameraCurr[i].MV_CODEREADER_DestroyHandle_NET();
                        cameraCurr[i] = null;
                    }
                }
            }
        }

        public Image GrabOne(int index, out List<CodeInfo> codeInfos)
        {
            codeInfos = new List<CodeInfo>();
            if (cameraCurr[index] == null || ((!_isOpen[index])))
            {
                bool result = Open(index);
                if (!result)
                {
                    return null;
                }
            }
            if (cameraCurr[index] == null)
            {
                SetErrorMsg("Camera null");
                return null;
            }
            try
            {

                return ImageCapture(index, out codeInfos);
            }
            catch (Exception ex)
            {
                SetErrorMsg(ex.Message);
                return null;
            }
            finally
            {
                if (cameraCurr[index] != null)
                {
                    cameraCurr[index].MV_CODEREADER_StopGrabbing_NET();
                }
                Task.Run(() => { IDHIK.Instance.Close(index); Thread.Sleep(500); IDHIK.Instance.Open(index); });
            }
        }

        public Image GrabOne(string name, out List<CodeInfo> codeInfos)
        {
            codeInfos = new List<CodeInfo>();
            int idx = Array.FindIndex(_name, s => s == name);
            if (idx == -1)
                return null;
            else
                return GrabOne(idx, out codeInfos);
        }

        // ch:用于从驱动获取图像的缓存 | en:Buffer for getting image from driver
        private byte[] m_BufForDriver = new byte[1024 * 1024 * 20];

        private Bitmap bmp = null;
        private Image ImageCapture(int index, out List<CodeInfo> codeList)
        {
            IntPtr pstFrameInfoEx2= IntPtr.Zero, pData= IntPtr.Zero; 
            codeList = new List<CodeInfo>();
            if (!StartGrabbing(index))
            {
                return null;
            }
            try
            {
                int nRet = MvCodeReader.MV_CODEREADER_OK;
                Thread.Sleep(50);
                MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2 stFrameInfoEx2 = new MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2();
                pstFrameInfoEx2 = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2)));
                Marshal.StructureToPtr(stFrameInfoEx2, pstFrameInfoEx2, false);
                for (int i = 0; i < 4; i++)
                {
                    nRet = cameraCurr[index].MV_CODEREADER_GetOneFrameTimeoutEx2_NET(ref pData, pstFrameInfoEx2, 1000);
                    if (nRet == MvCodeReader.MV_CODEREADER_OK)
                    {

                        stFrameInfoEx2 = (MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2)Marshal.PtrToStructure(pstFrameInfoEx2, typeof(MvCodeReader.MV_CODEREADER_IMAGE_OUT_INFO_EX2));
                        break;
                    }
                    else
                    {
                        LibLogUtil.Error(" Can not grab one : "+ nRet);
                        Thread.Sleep(50);
                    }
                }
                List<Point[]> pts=new List<Point[]>();
                if (nRet == MvCodeReader.MV_CODEREADER_OK)
                {
                    if (0 >= stFrameInfoEx2.nFrameLen)
                    {
                        SetErrorMsg("Can not grab one : ", nRet);
                        return null;
                    }
                    MvCodeReader.MV_CODEREADER_RESULT_BCR_EX2 stBcrResultEx2 = (MvCodeReader.MV_CODEREADER_RESULT_BCR_EX2)Marshal.PtrToStructure(stFrameInfoEx2.UnparsedBcrList.pstCodeListEx2, typeof(MvCodeReader.MV_CODEREADER_RESULT_BCR_EX2));

                    for (int i = 0; i < stBcrResultEx2.nCodeNum; ++i)
                    {
                        // 条码位置的4个点坐标
                        Point[] stPointList = new Point[4];
                        CodeInfo code = new CodeInfo();
                        int suX = 0;
                        int suY = 0;
                        for (int j = 0; j < 4; ++j)
                        {
                            stPointList[j].X = (int)(stBcrResultEx2.stBcrInfoEx2[i].pt[j].x);
                            stPointList[j].Y = (int)(stBcrResultEx2.stBcrInfoEx2[i].pt[j].y);
                            suX += (int)(stBcrResultEx2.stBcrInfoEx2[i].pt[j].x);
                            suY += (int)(stBcrResultEx2.stBcrInfoEx2[i].pt[j].y);
                        }
                        pts.Add(stPointList);
                        code.CodeType = GetBarType((MvCodeReader.MV_CODEREADER_CODE_TYPE)stBcrResultEx2.stBcrInfoEx2[i].nBarType);
                        String strCode = System.Text.Encoding.Default.GetString(stBcrResultEx2.stBcrInfoEx2[i].chCode);
                        //code.CodeStr = ReplaceCode(  String.IsNullOrEmpty(strCode) ? "" : strCode);
                        code.CodeStr = RemoveNUL(String.IsNullOrEmpty(strCode) ? "" : strCode);

                        code.Orientation = stBcrResultEx2.stBcrInfoEx2[i].nAngle;
                        code.X = suX / 4;
                        code.Y = suY / 4;

                        codeList.Add(code);
                    }
                    // 绘制图像
                    Marshal.Copy(pData, m_BufForDriver, 0, (int)stFrameInfoEx2.nFrameLen);
                    if (stFrameInfoEx2.enPixelType == MvCodeReader.MvCodeReaderGvspPixelType.PixelType_CodeReader_Gvsp_Mono8)
                    {
                        IntPtr pImage = Marshal.UnsafeAddrOfPinnedArrayElement(m_BufForDriver, 0);
                        bmp = new Bitmap(stFrameInfoEx2.nWidth, stFrameInfoEx2.nHeight, stFrameInfoEx2.nWidth, PixelFormat.Format8bppIndexed, pImage);
                        ColorPalette cp = bmp.Palette;
                        for (int i = 0; i < 256; i++)
                        {
                            cp.Entries[i] = Color.FromArgb(i, i, i);
                        }
                        bmp.Palette = cp;

                        if (DrawLine)
                        {
                            Graphics g = Graphics.FromImage(bmp);
                            Pen pen = new Pen(Color.Blue, 3);                   // 画笔颜色

                            foreach (Point[] points in pts)
                            {
                                g.DrawPolygon(pen, points);
                            }
                            g.Save();
                            g.Dispose();
                        }

                        return bmp;
                    }
                    else if (stFrameInfoEx2.enPixelType == MvCodeReader.MvCodeReaderGvspPixelType.PixelType_CodeReader_Gvsp_Jpeg)
                    {
                        MemoryStream ms = new MemoryStream();
                        ms.Write(m_BufForDriver, 0, (int)stFrameInfoEx2.nFrameLen);

                        Image img = Bitmap.FromStream(ms);
                        if (DrawLine)
                        {
                            Graphics g = Graphics.FromImage(img);
                            Pen pen = new Pen(Color.Blue, 3);                   // 画笔颜色

                            foreach (Point[] points in pts)
                            {
                                g.DrawPolygon(pen, points);
                            }
                            g.Save();
                            g.Dispose();
                        }
                        return img;
                    }
                }
            }
            catch (Exception ex)
            {
                SetErrorMsg(ex.ToString());
            }
            finally
            {              
                StopGrabbing(index);
                Marshal.FreeHGlobal(pstFrameInfoEx2);
                //Marshal.FreeHGlobal(pData);
            }          
            return null; 
        }
        private bool StartGrabbing(int index)
        {
            // ch:开始采集 | en:Start Grabbing
            int rtn = cameraCurr[index].MV_CODEREADER_StartGrabbing_NET();
            LibLogUtil.Info($"相机索引：{rtn}");
            if (rtn != MvCodeReader.MV_CODEREADER_OK)
            {
                SetErrorMsg("Can not grab one : ", rtn);
                return false;
            }
            return true;
        }
        private bool StopGrabbing(int index)
        {

            // ch:停止采集 | en:Stop Grabbing
            int nRet = cameraCurr[index].MV_CODEREADER_StopGrabbing_NET();
            LibLogUtil.Info($"关闭结果{nRet}；索引{index}");
            if (nRet != MvCodeReader.MV_CODEREADER_OK)
            {
                SetErrorMsg("Stop Grabbing Fail!", nRet);
                return false;
            }
            return true;
        }
         
        public static T DeepClone<T>(T _object)
        {
            try
            {
                T dstobject;
                using (MemoryStream mStream = new MemoryStream())
                {
                    BinaryFormatter bf = new BinaryFormatter();
                    bf.Serialize(mStream, _object);
                    mStream.Seek(0, SeekOrigin.Begin);//指定当前流的位置为流的开头。
                    dstobject = (T)bf.Deserialize(mStream);
                    mStream.Close();
                }
                return dstobject;
            }
            catch (Exception e)
            {
                LibLogUtil.Error("DeepClone" + e.ToString());
                return default;
            }
        } 

        private static void __OnFreeCallBack(IntPtr pImg)
        {
            Marshal.FreeHGlobal(pImg);
        }

        // ch:显示错误信息 | en:Show error message
        private string SetErrorMsg(string csMessage, int nErrorNum = 0)
        {
            string errorMsg;
            if (nErrorNum == 0)
            {
                errorMsg = csMessage;
            }
            else
            {
                errorMsg = csMessage + ": Error =" + String.Format("{0:X}", nErrorNum);
            }

            switch (nErrorNum)
            {
                case MvCodeReader.MV_CODEREADER_E_HANDLE: errorMsg += " Error or invalid handle "; break;
                case MvCodeReader.MV_CODEREADER_E_SUPPORT: errorMsg += " Not supported function "; break;
                case MvCodeReader.MV_CODEREADER_E_BUFOVER: errorMsg += " Cache is full "; break;
                case MvCodeReader.MV_CODEREADER_E_CALLORDER: errorMsg += " Function calling order error "; break;
                case MvCodeReader.MV_CODEREADER_E_PARAMETER: errorMsg += " Incorrect parameter "; break;
                case MvCodeReader.MV_CODEREADER_E_RESOURCE: errorMsg += " Applying resource failed "; break;
                case MvCodeReader.MV_CODEREADER_E_NODATA: errorMsg += " No data "; break;
                case MvCodeReader.MV_CODEREADER_E_PRECONDITION: errorMsg += " Precondition error, or running environment changed "; break;
                case MvCodeReader.MV_CODEREADER_E_VERSION: errorMsg += " Version mismatches "; break;
                case MvCodeReader.MV_CODEREADER_E_NOENOUGH_BUF: errorMsg += " Insufficient memory "; break;
                case MvCodeReader.MV_CODEREADER_E_UNKNOW: errorMsg += " Unknown error "; break;
                case MvCodeReader.MV_CODEREADER_E_GC_GENERIC: errorMsg += " General error "; break;
                case MvCodeReader.MV_CODEREADER_E_GC_ACCESS: errorMsg += " Node accessing condition error "; break;
                case MvCodeReader.MV_CODEREADER_E_ACCESS_DENIED: errorMsg += " No permission "; break;
                case MvCodeReader.MV_CODEREADER_E_BUSY: errorMsg += " Device is busy, or network disconnected "; break;
                case MvCodeReader.MV_CODEREADER_E_NETER: errorMsg += " Network error "; break;
            }
            _errInfo = errorMsg;
            // if(nErrorNum > 0)
            {
                LibLogUtil.Error(errorMsg);
            }
            return errorMsg;
        }
        private static String GetBarType(MvCodeReader.MV_CODEREADER_CODE_TYPE nBarType)
        {
            switch (nBarType)
            {
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_TDCR_DM:
                    return "Data Matrix";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_TDCR_QR:
                    return "QR Code";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_EAN8:
                    return "EAN-8";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_UPCE:
                    return "UPC-E";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_UPCA:
                    return "UPC-A";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_EAN13:
                    return "EAN-13";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_ISBN13:
                    return "ISBN-13";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_CODABAR:
                    return "Codabar";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_ITF25:
                    return "ITF-25";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_CODE39:
                    return "Code 39";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_CODE93:
                    return "Code 93";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_CODE128:
                    return "Code 128";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_TDCR_PDF417:
                    return "PDF417";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_MATRIX25:
                    return "MATRIX25";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_MSI:
                    return "MSI";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_CODE11:
                    return "Code 11";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_INDUSTRIAL25:
                    return "Industral-25";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_CHINAPOST:
                    return "CHINAPOST";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_BCR_ITF14:
                    return "ITF-14";
                case MvCodeReader.MV_CODEREADER_CODE_TYPE.MV_CODEREADER_TDCR_ECC140:
                    return "ECC140";
                default:
                    return "/";
            }
        }
        // 判断字符编码
        public static bool IsTextUTF8(byte[] inputStream)
        {
            int encodingBytesCount = 0;
            bool allTextsAreASCIIChars = true;

            for (int i = 0; i < inputStream.Length; i++)
            {
                byte current = inputStream[i];

                if ((current & 0x80) == 0x80)
                {
                    allTextsAreASCIIChars = false;
                }
                // First byte
                if (encodingBytesCount == 0)
                {
                    if ((current & 0x80) == 0)
                    {
                        // ASCII chars, from 0x00-0x7F
                        continue;
                    }

                    if ((current & 0xC0) == 0xC0)
                    {
                        encodingBytesCount = 1;
                        current <<= 2;

                        // More than two bytes used to encoding a unicode char.
                        // Calculate the real length.
                        while ((current & 0x80) == 0x80)
                        {
                            current <<= 1;
                            encodingBytesCount++;
                        }
                    }
                    else
                    {
                        // Invalid bits structure for UTF8 encoding rule.
                        return false;
                    }
                }
                else
                {
                    // Following bytes, must start with 10.
                    if ((current & 0xC0) == 0x80)
                    {
                        encodingBytesCount--;
                    }
                    else
                    {
                        // Invalid bits structure for UTF8 encoding rule.
                        return false;
                    }
                }
            }

            if (encodingBytesCount != 0)
            {
                // Invalid bits structure for UTF8 encoding rule.
                // Wrong following bytes count.
                return false;
            }

            // Although UTF8 supports encoding for ASCII chars, we regard as a input stream, whose contents are all ASCII as default encoding.
            return !allTextsAreASCIIChars;
        }

        public static string RemoveNUL(string input)
        {
            // 将 [NUL] 隐藏字符，替换为空字符串
            string result = input.Replace("\x00", "");
            return result;
        }

        /// <summary>
        /// 处理接收后的二维码
        /// </summary>
        /// <param name="message"></param>
        /// <returns></returns>
        public static string ReplaceCode(string message)
        {
            message = message.Trim();
            message = message.Replace("\r", "");
            message = message.Replace("\n", "");
            char a = (char)02;
            message = message.Replace(a.ToString(), "");
            message = message.Trim();
            if (!HasChinese(message))
            {
                System.Text.ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
                byte[] bytes = asciiEncoding.GetBytes(message);
                List<byte> newBytes = new List<byte>();
                foreach (byte by in bytes)
                {
                    int value = (int)by;
                    if (value.Equals(24) || value.Equals(30) || value.Equals(29) || value.Equals(4))
                    {
                        continue;
                    }
                    if (value.Equals(00))
                    {
                        continue;
                    }
                    if (!value.Equals(24))
                    {
                        newBytes.Add(by);
                    }
                }
                message = asciiEncoding.GetString(newBytes.ToArray());
            }
            return message;
        }
        public static bool HasChinese(string str)
        {
            return Regex.IsMatch(str, @"[\u4e00-\u9fa5]");
        }
    }   
}