form1.cs

vs2005串口编程示例,好多例子,是学习串口编程方面不错的资料

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Runtime.InteropServices;
using System.Data.OleDb;

namespace _3_07
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //初始化
            int icdev = IC.auto_init(0, 9600);
            if (icdev < 0)
                label6.Text = "端口初始化失败,请检查接口线是否连接正确。";
            unsafe
            {
                Int16 status = -1;
                Int16 result = IC.get_status(icdev, &status);
                int md = IC.setsc_md(icdev, 1);   //设备密码格式
                if (result < 0)
                {
                    int d1 = IC.ic_exit(icdev);  //关闭设备
                    return;
                }
                else if ((result == 0) && (status == 0))
                {
                    int d2 = IC.ic_exit(icdev);  //关闭设备
                    label6.Text = "请插入IC卡";
                    return;
                }
            }
            unsafe
            {
                char str = 'a';
                int read = -1;
                string ic = "";
                for (int j = 0; j < 6; j++)
                {
                    read = IC.srd_4442(icdev, 33 + j, 1, &str);
                    ic = ic + Convert.ToString(str);
                }
                textBox1.Text = ic;
                if (read == 0)
                    label6.Text = "刷卡成功！";
                int beep = IC.dv_beep(icdev, 20);  //发出蜂鸣声
                int d3 = IC.ic_exit(icdev);   //关闭设备
            }
            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
            {
                label6.Text = "不存在该用户！";
            }
        }

    }
}
[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 unsafe 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);
    //读取IC卡中数据
    [DllImport("Mwic_32.dll", EntryPoint = "srd_4442", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
    public static extern int srd_4442(int icdev, int offset, int len, char* r_string);
}