操作IC卡

 public partial class ReadCard : Form
    {
        // 操作IC卡的函数，封装在IC类中
        [StructLayout(LayoutKind.Sequential)]
        public unsafe class IC
        {
            //对设备进行初始化
            [DllImport("Mwic_32.dll", EntryPoint = "auto_init", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
            public static extern int auto_init(int port, int baud);
            //设备密码格式
            [DllImport("Mwic_32.dll", EntryPoint = "setsc_md", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
            public static extern int setsc_md(int icdev, int mode);
            //获取设备当前状态
            [DllImport("Mwic_32.dll", EntryPoint = "get_status", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
            public static extern Int16 get_status(int icdev, Int16* state);
            //关闭设备通讯接口
            [DllImport("Mwic_32.dll", EntryPoint = "ic_exit", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
            public static extern int ic_exit(int icdev);
            //使设备发出蜂鸣声
            [DllImport("Mwic_32.dll", EntryPoint = "dv_beep", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
            public static extern int dv_beep(int icdev, int time);
            //向IC卡中写数据
            [DllImport("Mwic_32.dll", EntryPoint = "swr_4442", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
            public static extern int swr_4442(int icdev, int offset, int len, char* w_string);
            //核对卡密码  
            [DllImport("Mwic_32.dll", EntryPoint = "csc_4442", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
            public static extern Int16 Csc_4442(int icdev, int len, [MarshalAs(UnmanagedType.LPArray)] byte[] p_string);
        }


        public ReadCard()
        {
            InitializeComponent();
        }

        // 下面主要是 将TextBox的数据写入到IC卡
        private void button1_Click(object sender, EventArgs e)
        {
            //初始化
            int icdev = IC.auto_init(0, 9600);
            if (icdev < 0)
                MessageBox.Show("端口初始化失败,请检查接口线是否连接正确。", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            int md = IC.setsc_md(icdev, 1); //设备密码格式
            unsafe
            {
                Int16 status = 0;
                Int16 result = 0;
                result = IC.get_status(icdev, &status);
                if (result != 0)
                {
                    MessageBox.Show("设备当前状态错误！");
                    int d1 = IC.ic_exit(icdev);   //关闭设备
                    return;
                }
                if (status != 1)
                {
                    MessageBox.Show("请插入ＩＣ卡");
                    int d2 = IC.ic_exit(icdev);   //关闭设备
                    return;
                }
            }
            unsafe
            {
                //卡的密码默认为6个F（密码为：ffffff），1个F的16进制是15,2个F的16进制是255。
                byte[] pwd = new byte[3] { 255, 255, 255 };
                //byte[] pwd = new byte[3] { 0xff, 0xff, 0xff };
                //char[] pass=new ch{0xff,0xff,0xff};
                Int16 checkIC_pwd = IC.Csc_4442(icdev, 3, pwd);
                if (checkIC_pwd < 0)
                {
                    MessageBox.Show("ＩＣ卡密码错误！");
                    return;
                }
                char str = 'a';
                int write = -1;
                for (int j = 0; j < textBox1.Text.Length; j++)
                {
                    str = Convert.ToChar(textBox1.Text.Substring(j, 1));
                    write = IC.swr_4442(icdev, 33 + j, textBox1.Text.Length, &str);
                }

                if (write == 0)
                {
                    int beep = IC.dv_beep(icdev, 20);  //发出蜂鸣声
                    MessageBox.Show("数据已成功写入ＩＣ卡中！");
                }
                else
                {
                    MessageBox.Show("数据写入ＩＣ卡失败！");
                }
            }

            int d = IC.ic_exit(icdev);  //关闭设备


            //根据卡号，查找相应数据

            OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + "price.mdb" + ";Persist Security Info=False");

            OleDbDataAdapter dap = new OleDbDataAdapter("select * from worker where ICID='" + textBox1.Text + "'", con);

            DataSet ds = new DataSet();

            dap.Fill(ds, "table");

            if (ds.Tables.Count > 0)
            {

                textBox2.Text = ds.Tables[0].Rows[0][0].ToString();

                textBox3.Text = ds.Tables[0].Rows[0][1].ToString();

                textBox4.Text = ds.Tables[0].Rows[0][2].ToString();

                textBox5.Text = ds.Tables[0].Rows[0][3].ToString();

            }

            else
            { 
                MessageBox.Show("不存在该用户！");
            }



        }

        private void button2_Click(object sender, EventArgs e)
        {
            Application.Exit();

        }
    }
}