C#实现的USB接口操作类.doc

USB在日常中已经广泛被使用，手机，MP3，MP4，相机等都采用了USB接口。本文向大家介绍一个C#实现的USB接口操作类。

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            USB usb;
            usb = new UDisk();//插入U盘
            usb.OutputFile();//从U盘读出文件
            usb.InputFile();//往U盘写入文件
            usb.Dispose();//拔出U盘
            Console.WriteLine("");
            usb = new MDisk();//插入移动硬盘
            usb.OutputFile();//从移动硬盘读出文件
            usb.InputFile();//往移动硬盘写入文件
            usb.Dispose();//拔出移动硬盘
            Console.WriteLine("");
            usb = new MP4();//插入MP4
            usb.OutputFile();//从MP4读出文件
            usb.InputFile();//往MP4写入文件
            usb.Dispose();//拔出MP4
            Console.ReadKey();
        }

        //USB接口
        public interface USB : IDisposable
        {
            void OutputFile();//读出文件
            void InputFile();//写入文件
        }

        //U盘
        public class UDisk : USB
        {
            public UDisk()
            {
                Console.WriteLine("U盘准备就绪...");
            }
            public void OutputFile()
            {
                Console.WriteLine("从U盘读出文件");
            }
            public void InputFile()
            {
                Console.WriteLine("往U盘写入文件");
            }
            public void Dispose()
            {
                Console.WriteLine("U盘已被拔出");
            }
        }

        //移动硬盘
        public class MDisk : USB
        {
            public MDisk()
            {
                Console.WriteLine("移动硬盘准备就绪...");
            }
            public void OutputFile()
            {
                Console.WriteLine("从移动硬盘读出文件");
            }
            public void InputFile()
            {
                Console.WriteLine("往移动硬盘写入文件");
            }
            public void Dispose()
            {
                Console.WriteLine("移动硬盘已被拔出");
            }
        }

        //MP4
        public class MP4 : USB
        {
            public MP4()
            {
                Console.WriteLine("MP4准备就绪...");
            }
            public void OutputFile()
            {
                Console.WriteLine("从MP4读出文件");
            }
            public void InputFile()
            {
                Console.WriteLine("往MP4写入文件");
            }
            public void Dispose()
            {
                Console.WriteLine("MP4已被拔出");
            }
        }
    }
}

用C#写的一个读写USB口操作的类
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace WindowsApplication1
{
   classClass1
    {
        [DllImport("kernel32.dll")]
       privatestaticexternIntPtr CreateFile(
           String lpFileName,
           UInt32 dwDesiredAccess,
           UInt32 dwShareMode,
           IntPtr lpSecurityAttributes,
           UInt32 dwCreationDisposition,
           UInt32 dwFlagsAndAttributes,
           IntPtr hTemplateFile
           );

        [DllImport("Kernel32.dll")]
       privatestaticexternbool ReadFile(
           IntPtr hFile,
           byte[] lpBuffer,
           uint nNumberOfBytesToRead,
           refuint lpNumberOfBytesRead,
           IntPtr lpOverlapped
            );

        [DllImport("Kernel32.dll")]
       privatestaticexternbool WriteFile(
           IntPtr hFile,
           byte[] lpBuffer,
           uint nNumberOfBytesToWrite,
           refuint lpNumberOfBytesWritten,
           IntPtr lpOverlapped
            );

        [DllImport("kernel32.dll")]
       privatestaticexternbool CloseHandle(
           IntPtr hObject
            );

       //--------------------------------------------------------------------------------
       IntPtr hFile;

       privateconstUInt32 GENERIC_READ = 0x80000000;
       privateconstUInt32 GENERIC_WRITE = 0x40000000;
       privateconstUInt32 OPEN_EXISTING = 3;
       privateconstInt32 INVALID_HANDLE_VALUE = -1;
       privateconstint USB_WRITENUM = 8;
       privateconstint USB_READNUM = 8;

       privatebyte[] m_rd_data = newbyte[USB_READNUM];
       publicbyte[] rd_data
        {
           get { return m_rd_data; }
           set { m_rd_data = value; }
        }
       privatebyte[] m_wr_data = newbyte[USB_WRITENUM];
       publicbyte[] wr_data
        {
           get { return m_wr_data; }
           set { m_wr_data = value; }
        }

       publicbool OnInitUSB()
        {
            hFile = IntPtr.Zero;
           string deviceName = string.Empty;
            deviceName = "在这里写上你的设备的地址";

            hFile = CreateFile(
                deviceName,
                GENERIC_READ | GENERIC_WRITE,
                0,
               IntPtr.Zero,
               OPEN_EXISTING,
                0,
               IntPtr.Zero
                );

           return hFile.ToInt32() == INVALID_HANDLE_VALUE ? false : true;
        }

       publicbool USBDataRead()
        {
           uint read = 0;
           return ReadFile(hFile, m_rd_data, (uint)USB_READNUM, ref read, IntPtr.Zero);
        }

       publicbool USBDataWrite()
        {
           uint written = 0;
           return WriteFile(hFile, m_wr_data, (uint)USB_WRITENUM, ref written, IntPtr.Zero);
        }

       publicvoid CloseConnection()
        {
           if (hFile.ToInt32() != INVALID_HANDLE_VALUE)
            {
                CloseHandle(hFile);
                hFile = IntPtr.Zero;
            }
        }
    }
}

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