背景：Vue调用硬件比较麻烦，通过明华读卡器读取IC卡的数据，封装成一个HTTP，其他人只需要调用HTTP就可以读取IC卡。
Demo效果图：
一.c# 通过HttpListener创建HTTP服务
在c#中可以利用HttpListener来自定义创建HTTP服务，通过http协议进行服务端与多个客户端之间的信息传递，并且可以做成windows系统服务，而不用寄宿在IIS上。
二.使用明华读卡器，需要把mwrf32.dll放在在根目录里（与.exe同一目录，可去官网下载）
1.读IC卡数据需要五步
连接读卡器、加载密码,此密码是用来验证卡片的密码、寻卡、验证密码、读数据
2.一片对应四区，如果密码验证错误就会读不出数据，比如2对应8
var stcode = rf_authentication(icdev, 0, 2); //验证密码
var st = rf_read_hex(icdev, 8, databuffer); //读数据
三、源码
public partial class MainWindow : Window
{ //变量
public static IntPtr icdev = IntPtr.Zero;
static HttpListener httpobj;
//static byte sector; //扇区号
public static string msg;
public static string msg2;
public static string msg3;
public static string msg4;
public MainWindow()
{
InitializeComponent();
//提供一个简单的、可通过编程方式控制的 HTTP 协议侦听器。此类不能被继承。
httpobj = new HttpListener();
//定义url及端口号，通常设置为配置文件
httpobj.Prefixes.Add("http://127.0.0.1/ReadIC/");
//启动监听器
httpobj.Start();
//异步监听客户端请求，当客户端的网络请求到来时会自动执行Result委托
//该委托没有返回值，有一个IAsyncResult接口的参数，可通过该参数获取context对象
httpobj.BeginGetContext(Result, null);
bt1_Click();
}
private static void Result(IAsyncResult ar)
{
//当接收到请求后程序流会走到这里
//继续异步监听
httpobj.BeginGetContext(Result, null);
var guid = Guid.NewGuid().ToString();
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine($"接到新的请求:{guid},时间：{DateTime.Now.ToString()}");
//获得context对象
var context = httpobj.EndGetContext(ar);
var request = context.Request;
var response = context.Response;
////如果是js的ajax请求，还可以设置跨域的ip地址与参数
//context.Response.AppendHeader("Access-Control-Allow-Origin", "*");//后台跨域请求，通常设置为配置文件
//context.Response.AppendHeader("Access-Control-Allow-Headers", "ID,PW");//后台跨域参数设置，通常设置为配置文件
//context.Response.AppendHeader("Access-Control-Allow-Method", "post");//后台跨域请求设置，通常设置为配置文件
context.Response.ContentType = "text/plain;charset=UTF-8";//告诉客户端返回的ContentType类型为纯文本格式，编码为UTF-8
context.Response.AddHeader("Content-type", "text/plain;charset=UTF-8");//添加响应头信息
context.Response.ContentEncoding = Encoding.UTF8;
string returnObj = null;//定义返回客户端的信息
if (request.HttpMethod == "POST" && request.InputStream != null)
{
//处理客户端发送的请求并返回处理信息
returnObj = HandleRequest(request, response);
}
else
{
bt2_Click();
bt3_Click();
bt4_Click();
returnObj = msg + "\r\n" + msg2 + "\r\n" + msg3 + "\r\n" + msg4;
}
var returnByteArr = Encoding.UTF8.GetBytes(returnObj);//设置客户端返回信息的编码
try
{
using (var stream = response.OutputStream)
{
//把处理信息返回到客户端
stream.Write(returnByteArr, 0, returnByteArr.Length);
}
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine($"网络蹦了：{ex.ToString()}");
}
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine($"请求处理完成：{guid},时间：{ DateTime.Now.ToString()}\r\n");
}
private static string HandleRequest(HttpListenerRequest request, HttpListenerResponse response)
{
string data = null;
try
{
var byteList = new List<byte>();
var byteArr = new byte[2048];
int readLen = 0;
int len = 0;
//接收客户端传过来的数据并转成字符串类型
do
{
readLen = request.InputStream.Read(byteArr, 0, byteArr.Length);
len += readLen;
byteList.AddRange(byteArr);
} while (readLen != 0);
data = Encoding.UTF8.GetString(byteList.ToArray(), 0, len);
//获取得到数据data可以进行其他操作
}
catch (Exception ex)
{
response.StatusDescription = "404";
response.StatusCode = 404;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine($"在接收数据时发生错误:{ex.ToString()}");
return $"在接收数据时发生错误:{ex.ToString()}";//把服务端错误信息直接返回可能会导致信息不安全，此处仅供参考
}
response.StatusDescription = "200";//获取或设置返回给客户端的 HTTP 状态代码的文本说明。
response.StatusCode = 200;// 获取或设置返回给客户端的 HTTP 状态代码。
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"接收数据完成:{data.Trim()},时间：{DateTime.Now.ToString()}");
return $"接收数据完成";
}
[DllImport("mwrf32.dll", EntryPoint = "rf_init", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr rf_init(Int16 port, int baud);
[DllImport("mwrf32.dll", EntryPoint = "usb_init", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr usb_init();
[DllImport("mwrf32.dll", EntryPoint = "rf_exit", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_exit(IntPtr icdev);
[DllImport("mwrf32.dll", EntryPoint = "rf_beep", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_beep(IntPtr icdev, int msec);
[DllImport("mwrf32.dll", EntryPoint = "rf_get_status", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_get_status(IntPtr icdev, byte[] state);
[DllImport("mwrf32.dll", EntryPoint = "rf_load_key", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_load_key(IntPtr icdev, byte mode, byte secnr, byte[] keybuff);
[DllImport("mwrf32.dll", EntryPoint = "rf_load_key_hex", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_load_key_hex(IntPtr icdev, byte mode, byte secnr, byte[] keybuff);
[DllImport("mwrf32.dll", EntryPoint = "a_hex", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 a_hex(byte[] asc, byte[] hex, Int16 len);
[DllImport("mwrf32.dll", EntryPoint = "hex_a", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 hex_a(byte[] hex, byte[] asc, Int16 len);
[DllImport("mwrf32.dll", EntryPoint = "rf_reset", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_reset(IntPtr icdev, Int16 msec);
[DllImport("mwrf32.dll", EntryPoint = "rf_request", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_request(IntPtr icdev, byte mode, out UInt16 tagtype);
[DllImport("mwrf32.dll", EntryPoint = "rf_anticoll", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_anticoll(IntPtr icdev, byte bcnt, out UInt32 snr);
[DllImport("mwrf32.dll", EntryPoint = "rf_select", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_select(IntPtr icdev, UInt32 snr, out byte size);
[DllImport("mwrf32.dll", EntryPoint = "rf_card", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_card(IntPtr icdev, byte mode, byte[] snr); //这里将第三个参数设置为byte数组，以便直接返回16进制卡号
//public static extern Int16 rf_card(IntPtr icdev, int mode, out UInt32 snr);
[DllImport("mwrf32.dll", EntryPoint = "rf_authentication", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_authentication(IntPtr icdev, byte mode, byte secnr);
[DllImport("mwrf32.dll", EntryPoint = "rf_authentication_2", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_authentication_2(IntPtr icdev, byte mode, byte keynr, byte blocknr);
[DllImport("mwrf32.dll", EntryPoint = "rf_read", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_read(IntPtr icdev, byte blocknr, byte[] databuff);
[DllImport("mwrf32.dll", EntryPoint = "rf_read_hex", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_read_hex(IntPtr icdev, byte blocknr, byte[] databuff);
[DllImport("mwrf32.dll", EntryPoint = "rf_write_hex", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_write_hex(IntPtr icdev, int blocknr, byte[] databuff);
[DllImport("mwrf32.dll", EntryPoint = "rf_write", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_write(IntPtr icdev, byte blocknr, byte[] databuff);
[DllImport("mwrf32.dll", EntryPoint = "rf_halt", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_halt(IntPtr icdev);
[DllImport("mwrf32.dll", EntryPoint = "rf_changeb3", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_changeb3(IntPtr icdev, byte sector, byte[] keya, byte B0, byte B1,
byte B2, byte B3, byte Bk, byte[] keyb);
[DllImport("mwrf32.dll", EntryPoint = "rf_pro_rst", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_pro_rst(IntPtr icdev, byte[] _Data);
[DllImport("mwrf32.dll", EntryPoint = "rf_pro_trn", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_pro_trn(IntPtr icdev, byte[] problock, byte[] recv);
[DllImport("mwrf32.dll", EntryPoint = "rf_ctl_mode", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_ctl_mode(IntPtr icdev, byte mode); //受控方式
[DllImport("mwrf32.dll")]
public static extern Int16 rf_setbright(IntPtr icdev, byte bright);
[DllImport("mwrf32.dll")]
public static extern Int16 rf_disp_mode(IntPtr icdev, byte mode);
[DllImport("mwrf32.dll")]
public static extern Int16 rf_settime(IntPtr icdev, byte[] time);
[DllImport("mwrf32.dll", EntryPoint = "rf_ctl_mode", SetLastError = true,
CharSet = CharSet.Ansi, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_settimehex(IntPtr icdev, string time);
[DllImport("mwrf32.dll", EntryPoint = "rf_CtlBackLight", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_CtlBackLight(IntPtr icdev, byte cOpenFlag); //控制背光
[DllImport("mwrf32.dll", EntryPoint = "rf_LcdClrScrn", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_LcdClrScrn(IntPtr icdev, byte cLine); //清LCD屏
[DllImport("mwrf32.dll", EntryPoint = "rf_DispMainMenu", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_DispMainMenu(IntPtr icdev); //显示欢迎光临
[DllImport("mwrf32.dll", EntryPoint = "rf_DispLcd", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_DispLcd(IntPtr icdev, byte line, byte type); //显示系统内置操作
[DllImport("mwrf32.dll", EntryPoint = "rf_DispInfo", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_DispInfo(IntPtr icdev, byte line, byte offset, byte[] data); //显示信息，操作前需清屏
[DllImport("mwrf32.dll", EntryPoint = "rf_disp8", SetLastError = true,
CharSet = CharSet.Auto, ExactSpelling = false,
CallingConvention = CallingConvention.StdCall)]
public static extern Int16 rf_disp8(IntPtr icdev, Int16 disp_len, byte[] disp_str); //在读写器数码管上显示数字
public void bt1_Click()
{
icdev = usb_init(); //连接设备
if (icdev.ToInt32() > 0)
{
this.txt2.Text = "读卡器连接成功！";
msg = "已连接到读卡器.............";
byte[] status = new byte[30];
var st3 = rf_get_status(icdev, status); //读取硬件版本号
//lbHardVer.Text=System.Text.Encoding.ASCII.GetString(status);
Console.WriteLine(System.Text.Encoding.Default.GetString(status));
rf_beep(icdev, 25);
}
else
{
this.txt2.Text = "未识别到到读卡器，请检查设备连接后重试！！！！！";
msg = "未识别到到读卡器，请检查设备连接后重试！！！！";
}
}
public static void bt2_Click()
{
byte[] key = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
byte mode = 0;
//加载密码,此密码是用来验证卡片的密码
for (byte sector = 0; sector < 16; sector++)
{
var st1 = rf_load_key(icdev, mode, sector, key);
if (st1 != 0)
{
string s1 = Convert.ToString(sector);
// txt3.Text = s1 + " sector rf_load_key error!";
}
}
byte[] snr = new byte[5]; //卡片序列号
var st = rf_card(icdev, 0, snr); //寻卡
if (st != 0)
{
// txt3.Text = "未识别到IC卡！！！";
msg2 = "未识别到IC卡！！！";
}
else
{
byte[] snr1 = new byte[8];
// txt3.Text = "识别到IC卡！！！！！" ;
hex_a(snr, snr1, 4); //将卡号转换为16进制字符串
msg2 = "识别到IC卡," + "IC卡号：" + System.Text.Encoding.Default.GetString(snr1);
}
}
public static void bt3_Click()
{
var stcode = rf_authentication(icdev, 0, 2); //验证密码
if (stcode != 0)
{
// txt4.Text = "IC卡密码错误！！！！！";
msg3 = "IC卡密码错误！！！";
}
else
{
// txt4.Text = "IC卡密码正确！！！！！";
msg3 = "IC卡密码正确！！！";
}
}
public static void bt4_Click()
{
byte[] databuffer = new byte[32];
byte block = 8;
var st = rf_read_hex(icdev, block, databuffer); //读数据,此函数读出来的是16进制字符串，也就是把每个字节数据的16进制ASCⅡ码以字符串形式输出
if (st != 0)
{
// txt5.Text = "读取IC卡数据失败!" + st.ToString();
msg4 = "读取IC卡数据失败! " + st.ToString();
}
else
{
// txt5.Text = "读取IC卡数据成功!" + System.Text.Encoding.Default.GetString(databuffer);
msg4 = "读取IC卡数据成功!" + System.Text.Encoding.Default.GetString(databuffer);
}
}
private void Button_Click(object sender, RoutedEventArgs e)
{
bt2_Click();
bt3_Click();
bt4_Click();
}
}
参考：https://www.cnblogs.com/yijiayi/p/9867502.html