业务需求

在学员录入的时候添加一个读取身份证填充对应信息的功能，但遇到如下问题：

官方提供的demo读取身份证使用了com组件和activeX控件的技术，并且只支持IE，我们的前端项目没有兼容IE
技术选型选择了使用.net core 3.1,但网上的二次开发demo都是winform程序开发

解决方案

开发对应的webapi注册win服务在用户的本地运行作为读取身份证信息的中转程序，前端调用对应的接口获取读取的信息。

开发demo 编写调用二次开发dll

编写调用二次开发dll接口工具类ReadIdCardHelper（直接调用使用）

public class ReadIdCardHelper{#region DllImport[DllImport("idCardDll/sdtapi.dll")]private static extern int InitComm(int iPort);//初始化[DllImport("idCardDll/sdtapi.dll")]private static extern int CloseComm();//关闭端口[DllImport("idCardDll/sdtapi.dll")]private static extern int Authenticate();//卡认证[DllImport("idCardDll/sdtapi.dll")]//读取数据，推荐使用private static extern int ReadBaseInfos(StringBuilder Name,StringBuilder Gender,StringBuilder Folk,StringBuilder BirthDay,StringBuilder Code,StringBuilder Address,StringBuilder Agency,StringBuilder ExpireStart,StringBuilder ExpireEnd);[DllImport("idCardDll/sdtapi.dll")]//读取数据，推荐使用private static extern int Routon_BeepLED(bool BeepON, bool LEDON, int duration);#endregionstatic public void readCard(ref IdCardMessageDto idCardMessage){StringBuilder Name = new StringBuilder(31); // 姓名StringBuilder Gender = new StringBuilder(3); // 性别StringBuilder Folk = new StringBuilder(10); // 民族StringBuilder BirthDay = new StringBuilder(9); // 生日StringBuilder Code = new StringBuilder(19); // 证件号StringBuilder Address = new StringBuilder(71); // 家庭地址StringBuilder Agency = new StringBuilder(31); // 签发机关StringBuilder ExpireStart = new StringBuilder(9); // 有效期起始日期StringBuilder ExpireEnd = new StringBuilder(9); // 有效期截止日期//打开端口int intOpenRet = InitComm(1001);if (intOpenRet != 1){Console.WriteLine("阅读机具未连接");Routon_BeepLED(false,false,2000);return;}//卡认证int intReadRet = Authenticate();if (intReadRet != 1){Console.WriteLine("卡认证失败");Routon_BeepLED(false, false, 2000);CloseComm();return;}//读卡int intReadBaseInfosRet = ReadBaseInfos(Name, Gender, Folk, BirthDay, Code, Address, Agency, ExpireStart, ExpireEnd);if (intReadBaseInfosRet != 1){Console.WriteLine("读卡失败");Routon_BeepLED(false, false, 2000);CloseComm();return;}idCardMessage = new IdCardMessageDto();idCardMessage.Code = Code.ToString().Trim();idCardMessage.Name = Name.ToString().Trim();idCardMessage.Gender = Gender.ToString().Trim();idCardMessage.Folk = Folk.ToString().Trim();idCardMessage.BirthDay = BirthDay.ToString().Trim();idCardMessage.Address = Address.ToString().Trim();idCardMessage.Agency = Agency.ToString().Trim();idCardMessage.ExpireStart = ExpireStart.ToString().Trim();idCardMessage.ExpireEnd = ExpireEnd.ToString().Trim();idCardMessage.photo = System.IO.Directory.GetCurrentDirectory() + "\\photo.bmp";Routon_BeepLED(true, true, 2000);CloseComm();}

DLL文件必须位于程序当前目录或系统定义的查询路径中(即：系统环境变量中Path所设置的路径)
DLLImport会按照顺序去查找DLL文件(程序当前目录>System32目录>环境变量Path所设置路径)。