读卡器的Win32 Dll调用

 1 unsafe class Program
 2 {
 3     [DllImport("mwhrf_bj.dll")]
 4     public static extern int rf_card(int icdev, Byte _Mode, UInt64* _Snr);
 5 
 6     [DllImport("mwhrf_bj.dll")]
 7     public static extern int Open_USB();
 8 
 9     [DllImport("mwhrf_bj.dll")]
10     public static extern int Close_USB(int icdev);
11 
12     [DllImport("mwhrf_bj.dll")]
13     public static extern int rf_beep(int icdev, UInt32 _Msec);
14 
15     static void Main(string[] args)
16     {
17         int devID = Open_USB();
18         Console.WriteLine("打开端口成功");
19         while (true)
20         {
21             UInt64 cardSN;
22             int flag= rf_card(devID, (Byte)0x00, &cardSN);//寻一次卡 然后卡片必须拿开
23             //int flag= rf_card(devID, (Byte)0x00, &cardSN);//在卡片不拿走的情况连续询卡
24             if (flag != 1)
25             {
26                 rf_beep(devID, 10);
27                 Console.WriteLine("寻卡成功，卡号是{0}", cardSN);
28             }
29             Thread.Sleep(1000);
30         }
31         Close_USB(devID);
32         Console.WriteLine("关闭端口成功");
33     }
34 }