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;

namespace Ex13_04
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Dog dog = new Dog(100);
            dog.DogAddr = 0;		
            dog.DogBytes = 6;			
            dog.ReadDog();
            if (dog.Retcode == 0)
            {
                char[] chTemp = new char[6];
                for (int i = 0; i < 6; i++)
                {
                    chTemp[i] = (char)dog.DogData[i];
                }
                String str = new String(chTemp);
                if (textBox2.Text==str)
                {
                    MessageBox.Show("OK");
                }
                else
                {
                    MessageBox.Show("error");
                }
            }
        }

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

[StructLayout(LayoutKind.Sequential)]
//这个类用于读写加密狗。
public unsafe class Dog
{

    public uint DogBytes, DogAddr;  //设置加密狗起始地址
    public byte[] DogData;  //设置数据的长度
    public uint Retcode;

    [DllImport("Win32dll.dll", CharSet = CharSet.Ansi)]
    public static unsafe extern uint DogRead(uint idogBytes, uint idogAddr, byte* pdogData);

    public unsafe Dog(ushort num)
    {
        DogBytes = num;
        DogData = new byte[DogBytes]; //设置数据的长度
    }

    public unsafe void ReadDog()
    {
        fixed (byte* pDogData = &DogData[0])
        {
            Retcode = DogRead(DogBytes, DogAddr, pDogData);　　//将数据读出加密狗
        }
    }
}