c# 新中新二代身份證閱讀，包含頭像，支持華視

需要用到dll和文件：

其中3個dll文件是需要調用的dll，license.dat文件為解壓圖片的授權文件

以下是需要用到的dll里面的方法：

        /************************端口類API *************************/
        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetMaxRFByte", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetMaxRFByte(int iPort, byte ucByte, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_GetCOMBaud", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_GetCOMBaud(int iPort, ref uint puiBaudRate);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetCOMBaud", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetCOMBaud(int iPort, uint uiCurrBaud, uint uiSetBaud);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_OpenPort", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_OpenPort(int iPort);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ClosePort", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_ClosePort(int iPort);

        /**************************SAM類函數 **************************/
        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ResetSAM", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_ResetSAM(int iPort, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_GetSAMStatus", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_GetSAMStatus(int iPort, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_GetSAMID", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_GetSAMID(int iPort, ref byte pucSAMID, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_GetSAMIDToStr", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_GetSAMIDToStr(int iPort, ref byte pcSAMID, int iIfOpen);

        /*************************身份證卡類函數 ***************************/
        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_StartFindIDCard", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_StartFindIDCard(int iPort, ref byte pucIIN, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SelectIDCard", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SelectIDCard(int iPort, ref byte pucSN, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ReadBaseMsg", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_ReadBaseMsg(int iPort, IntPtr pucCHMsg, ref uint puiCHMsgLen, IntPtr pucPHMsg,
            ref uint puiPHMsgLen, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ReadIINSNDN", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_ReadIINSNDN(int iPort, ref byte pucIINSNDN, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ReadBaseMsgToFile", CharSet = CharSet.Ansi,
            SetLastError = true)]
        public static extern int Syn_ReadBaseMsgToFile(int iPort, ref byte pcCHMsgFileName, ref uint puiCHMsgFileLen,
            ref byte pcPHMsgFileName, ref uint puiPHMsgFileLen, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ReadIINSNDNToASCII", CharSet = CharSet.Ansi,
            SetLastError = true)]
        public static extern int Syn_ReadIINSNDNToASCII(int iPort, ref byte pucIINSNDN, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ReadNewAppMsg", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_ReadNewAppMsg(int iPort, ref byte pucAppMsg, ref uint puiAppMsgLen, int iIfOpen);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_GetBmp", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_GetBmp(string Wlt_File, int iPort);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_ReadMsg", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_ReadMsg(int iPortID, int iIfOpen, ref IDCardData pIDCardData);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_FindReader", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_FindReader();

        /***********************設置附加功能函數 ************************/
        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetPhotoPath", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetPhotoPath(int iOption, ref byte cPhotoPath);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetPhotoType", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetPhotoType(int iType);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetPhotoName", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetPhotoName(int iType);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetSexType", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetSexType(int iType);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetNationType", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetNationType(int iType);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetBornType", CharSet = CharSet.Ansi, SetLastError = true)]
        public static extern int Syn_SetBornType(int iType);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetUserLifeBType", CharSet = CharSet.Ansi,
            SetLastError = true)]
        public static extern int Syn_SetUserLifeBType(int iType);

        [DllImport("idCardDll\\SynIDCardAPI.dll", EntryPoint = "Syn_SetUserLifeEType", CharSet = CharSet.Ansi,
            SetLastError = true)]
        public static extern int Syn_SetUserLifeEType(int iType, int iOption);

        [DllImport("idCardDll\\WltRS.dll", CallingConvention = CallingConvention.StdCall, SetLastError = true)]
        static extern int GetBmp(string pucPHMsg, int intf);

讀取身份證信息分兩個階段，第一個階段是獲取基本信息，第二個階段是獲取圖片信息

獲取基本信息很簡單，直接調用dll的方法就可以完成，部分代碼如下：

            int status = 1;//默認為找不到身份證
            try
            {
                //先查找讀卡器
                int i, nRet;
                i = Syn_FindReader();
                //只支持usb
                if (i > 1000)
                {
                    var nPort = i;
                    if (Syn_OpenPort(nPort) == 0)
                    {
                        Thread.Sleep(5);
                        if (Syn_SetMaxRFByte(nPort, 80, 0) == 0)
                        {
                            Thread.Sleep(5);
                            byte[] pucIIN = new byte[4];
                            byte[] pucSN = new byte[8];
                            IDCardData cardMsg = new IDCardData();
                            nRet = Syn_StartFindIDCard(nPort, ref pucIIN[0], 0); //找卡
                            nRet = Syn_SelectIDCard(nPort, ref pucSN[0], 0); //選卡
                            string cardStr = new string(' ', 256); //身份證基本信息返回長度為256
                            string imgMsg = new string(' ', 1024); //身份證圖片信息返回長度為1024
                            IntPtr msg = Marshal.StringToHGlobalAnsi(cardStr); //身份證基本信息
                            IntPtr img = Marshal.StringToHGlobalAnsi(imgMsg); //身份證圖片
                            uint mLen = 0;
                            uint iLen = 0;
                            nRet = Syn_ReadBaseMsg(nPort, msg, ref mLen, img, ref iLen, 0);
                            if (nRet == 0)
                            {
                                Syn_ClosePort(nPort);
                                string card = Marshal.PtrToStringUni(msg);
                                char[] cartb = card.ToCharArray();
                                cardMsg.Name = (new string(cartb, 0, 15)).Trim();
                                cardMsg.Sex = new string(cartb, 15, 1);
                                cardMsg.Nation = new string(cartb, 16, 2);
                                cardMsg.Born = new string(cartb, 18, 8);
                                cardMsg.Address = (new string(cartb, 26, 35)).Trim();
                                cardMsg.IDCardNo = new string(cartb, 61, 18);
                                cardMsg.GrantDept = (new string(cartb, 79, 15)).Trim();
                                cardMsg.UserLifeBegin = new string(cartb, 94, 8);
                                cardMsg.UserLifeEnd = new string(cartb, 102, 8);

獲取圖片方法有點麻煩，首先通過Syn_ReadBaseMsg方法返回的圖片指針和長度獲取的字節信息：

byte[] data=new byte[iLen];
Marshal.Copy(img,data,0,data.Length);

將這個獲取到的字節信息保存為文件，注意，這里的文件不是圖片文件，而是一個wlt類型文件，如果需要獲取圖片，那么還需要通過GetBmp方法做轉換

        private static string GetImageBase64Str(byte[] data, string idCardNo)
        {
            if (!CheckLicense()) return string.Empty;//license.dat文件失敗，那么就不能去獲取文件
            var wltFileName = Path.Combine(_imageDirPath,
                string.Format("{0}.wlt", idCardNo));
            if (File.Exists(wltFileName))
            {
                File.Delete(wltFileName);
            }
            using (FileStream fs = new FileStream(wltFileName, FileMode.Create))
            {
                fs.Write(data, 0, data.Length);
                fs.Close();
            }
            var nRet = GetBmp(wltFileName, 2);
            if (nRet == 1)
            {
              //  Thread.Sleep(200);
                string bmpFileName = Path.Combine(_imageDirPath,
                    string.Format("{0}.bmp", idCardNo));
                if (File.Exists(bmpFileName))
                {
                    var str = GetFileBase64Str(bmpFileName);
                   // File.Delete(bmpFileName);
                    return str;
                }
            }
            return string.Empty;
        }

代碼中將圖片信息轉換為了base64字符串。

注意：

　　1.由於GetBmp調用了sdtapi.dll中的方法，所以在之前要先要關閉讀取的端口，不然會報錯。（這是網上用戶提醒的，我沒有測試過不關閉的情況）

　　2.GetBmp方法會在wlt文件的當前目錄下生成一個同名的bmp文件，這個文件就是身份證圖片文件

　　3.獲取圖片方法需要廠家的授權文件，我用的dll和授權文件都是新中新的，其中授權文件為license.dat，這個文件必須存放在C盤根目錄下，並且不能改名，不然讀取會出錯

        //檢測授權文件
        private static bool CheckLicense()
        {
            var licenceFile = @"c:\license.dat";
            var localFile = @"idCardDll\license.dat";
            try
            {
                if (!File.Exists(licenceFile))
                {
                    //不存在，拷貝文件過去
                    File.Copy(localFile,licenceFile,true);
                    return true;
                }
                //文件存在，需要判斷數據是否一致
                string local = string.Empty;
                string license = string.Empty;
                using (FileStream fs = new FileStream(localFile, FileMode.Open, FileAccess.Read))
                {
                    using (StreamReader sr = new StreamReader(fs))
                    {
                        local = sr.ReadToEnd();
                    }
                }
                using (FileStream fs = new FileStream(licenceFile, FileMode.Open, FileAccess.Read))
                {
                    using (StreamReader sr = new StreamReader(fs))
                    {
                        license = sr.ReadToEnd();
                    }
                }
                if (local == license)
                {
                    return true;
                }
                else
                {
                    File.Copy(localFile, licenceFile, true);
                    return true;
                }
            }
            catch (Exception ex)
            {
                //"判斷license失敗，不能去獲取圖片";
                return false;
            }

        }

在轉換圖片之前先判斷授權文件，成功在執行轉換操作。

最終結果是將信息存儲IDCardData結構體中，圖片信息轉換為base64str。

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
    public struct IDCardData
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string Name; //姓名   
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 6)]
        public string Sex; //性別
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]
        public string Nation; //名族
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 18)]
        public string Born; //出生日期
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 72)]
        public string Address; //住址
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 38)]
        public string IDCardNo; //身份證號
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string GrantDept; //發證機關

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 18)]
        public string UserLifeBegin; // 有效開始日期

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 18)]
        public string UserLifeEnd; // 有效截止日期

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 38)]
        public string reserved; // 保留
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 255)]
        public string PhotoBase64Str; // 照片路徑
    }

 

WltRS.dll一定要新一點的，我以前用的是2007年的，在轉換頭像的時候總是報錯，找了一個新的，是2012年的，就好了。

以下是我寫的一個demo，可以直接調用獲取，包含了32位和64的驅動

https://gitee.com/sczmzx/IdCardReaderHelper/tree/master/IdCardReaderHelper