C# ID卡识别硬件读写

C# ID卡识别硬件读写示例代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Collections;
//Download by http://www.codefans.net
namespace IDCard
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }
        public delegate int HookProc（int nCode int wParam IntPtr lParam）;
        static int hHook = 0;
        public const int WH_KEYBOARD_LL = 13;
        //LowLevel键盘截获，如果是WH_KEYBOARD＝2，并不能对系统键盘截取，Acrobat Reader会在你截取之前获得键盘。  
        HookProc KeyBoardHookProcedure;
        [DllImport（“kernel32“）]
        public static extern int Beep（int dwFreq int dwDuration）;//让计算机蜂鸣
        string DataPath = ““;//数据库路径
        OleDbConnection con;//OleDbConnection对象，连接数据库
        OleDbCommand cmd;//OleDbCommand对象，执行SQL语句
        //键盘Hook结构函数  
        [StructLayout（LayoutKind.Sequential）]
        public class KeyBoardHookStruct
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
            public int dwExtraInfo;
        }
        [DllImport（“user32.dll“）]
        public static extern int SetWindowsHookEx（int idHook HookProc lpfn IntPtr hInstance int threadId）;
        [DllImport（“user32.dll“ CharSet = CharSet.Auto CallingConvention = CallingConvention.StdCall）]
        //抽掉钩子  
        public static extern bool UnhookWindowsHookEx（int idHook）;
        [DllImport（“user32.dll“）]
        //调用下一个钩子  
        public static extern int CallNextHookEx（int idHook int nCode int wParam IntPtr lParam）;
        [DllImport（“kernel32.dll“）]
        public static extern IntPtr GetModuleHandle（string name）;

        public string  getNum（string code）
        {
            string flag = ““;
            switch （code）
            {
                case “048“:
                    flag=“0“; break;
                case “049“:
                    flag = “1“; break;
                case “050“:
                    flag = “2“; break;
                case “051“:
                    flag = “3“; break;
                case “052“:
                    flag = “4“; break;
                case “053“:
                    flag = “5“; break;
                case “054“:
                    flag = “6“; break;
                case “055“:
                    flag = “7“; break;
                case “056“:
                    flag = “8“; break;
                case “057“:
                    flag = “9“; break;
            }
            return flag;
        }
        public void Hook_Start（）
        {

            // 安装键盘钩子  
            if （hHook == 0）
            {
                KeyBoardHookProcedure = new HookProc（KeyBoardHookProc）;
                

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