您好，

我们正在开发一个Windows应用程序使用Visual Studio 2005中使用C＃。我们有一些迫切要求

基本上，我们需要读取和写入二进制文件（。斌）在记忆卡（线性闪存）。我们将使用一个USB适配器连接记忆卡。卡在浏览器作为移动设备的检测，但没有体积的标签细节。

使用CreateFile处理读操作fine.But写操作的工作，不工作时，我试着写使用CreateFile手柄。不返回AY错误，但二进制数据没有得到改变。

谁能告诉我如何解决这个

下面是正在使用的读取和写入的代码

 using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

 

using System.Text;

using System.Windows.Forms;

using System.Management; // need to add System.Management to your project references.



using System.Runtime.InteropServices;

using Microsoft.Win32.SafeHandles;

using System.IO;

 

namespace GetUSB

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

 

        }

 

        private void Form1_Load(object sender, EventArgs e)

        {

            Console.WriteLine();

            String[] drives = Environment.GetLogicalDrives();

            MessageBox.Show(string.Format("GetLogicalDrives: {0}", String.Join(", ", drives)));

 

            this.comboBox1.Items.AddRange(new object[] {

            "0",

            "1",

            "2",

            "3",

            "4",

            "5",

            "6"});

        }

 

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]

        internal static extern SafeFileHandle CreateFile(string lpFileName,

                    int dwDesiredAccess,

                    int dwShareMode,

                    IntPtr lpSecurityAttributes,

                    uint dwCreationDisposition,

                    uint dwFlagsAndAttributes,

                    SafeFileHandle hTemplateFile);

        internal const int GENERIC_READ = unchecked((int)0x80000000);

        internal const int GENERIC_ALL = unchecked((int)0x10000000);

        internal const int OPEN_EXISTING = 3;

        internal const int FILE_ATTRIBUTE_NORMAL = 0x80;

 



 

        protected void ReadRawFile(int DriveNumber)

        {

            const long MAX_FILE_SIZE = 4194304;

            //const long MAX_FILE_SIZE = 1024;

            SafeFileHandle h = null;

            h = CreateFile("\\\\.\\PhysicalDrive" + DriveNumber.ToString(), GENERIC_READ, 0, IntPtr.Zero, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, new SafeFileHandle(IntPtr.Zero, true));

            Cursor.Current = Cursors.WaitCursor;

 



            if (!h.IsInvalid)

            {

                FileStream stream = new FileStream(h, FileAccess.Read);

 

                //if (!string.IsNullOrEmpty(sfDialog.FileName))

                //{



                    FileStream outputFile = new FileStream(@"C:\\Temp\\Test" + DriveNumber.ToString() + ".bin", FileMode.Create);

                    //Application.UseWaitCursor = true;

                    //Cursor.Current = Cursors.WaitCursor;

                    Application.DoEvents();

                    try

                    {

                        long LocationCtr = 0;

                        while (LocationCtr < MAX_FILE_SIZE)

                        {

                            //Application.DoEvents();

                            outputFile.WriteByte((byte)stream.ReadByte());

                            LocationCtr++;

                        }

                    }

                    catch (Exception Ex)

                    {

                        MessageBox.Show(Ex.Message);

 

                    }

                    outputFile.Close();

                    stream.Close();

 

                    //Cursor.Current = Cursors.Default;

                    Application.DoEvents();

 

                //}



            }

            else

            {

                // get error code and throw

                int error = Marshal.GetLastWin32Error();

 

            }

        }

 



 

        [DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

        internal static extern int GetLogicalDrives();

 

        private void button2_Click(object sender, EventArgs e)

        {

            for (int Index = 0; Index < 10; Index++)

            {

                ReadRawFile(Index);//Convert.ToInt32(comboBox1.SelectedValue));

            }

        }

 

        private void button3_Click(object sender, EventArgs e)

        {

            const long MAX_FILE_SIZE = 4096;

            //const long MAX_FILE_SIZE = 1024;

            SafeFileHandle h = null;

            h = CreateFile("\\\\.\\PhysicalDrive" + "1", GENERIC_ALL, 2, IntPtr.Zero, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, new SafeFileHandle(IntPtr.Zero, true));

            Cursor.Current = Cursors.WaitCursor;

 



 

            if (!h.IsInvalid)

            {

                FileStream stream = new FileStream(h, FileAccess.Write);

                FileStream stream1 = new FileStream("C:\\Temp\\Test1.Bin", FileMode.Open);

               

                try

                {

                    char ch = 't';

                    long LocationCtr = 0;

                    while (LocationCtr < MAX_FILE_SIZE)

                    {

 

                        byte b = Convert.ToByte(ch);// 0;

                        stream.WriteByte(b);// ((byte)stream1.ReadByte());

                        LocationCtr++;

                    }

                }

                catch (Exception Ex)

                {

                    MessageBox.Show(Ex.Message);

 

                }

 

            }

            else

            {

                // get error code and throw

                int error = Marshal.GetLastWin32Error();

 

            }

 

            h.Close();

            

        }

 

         

 

    }

 



    class USBDeviceInfo

    {

        public USBDeviceInfo(string deviceID, string pnpDeviceID, string description)

        {

            this.DeviceID = deviceID;

            this.PnpDeviceID = pnpDeviceID;

            this.Description = description;

        }

        private string _DeviceID;

        private string _PnpDeviceID;

        private string _Description;

        public string DeviceID { get { return _DeviceID; } set { _DeviceID = value; } }

        public string PnpDeviceID { get { return _PnpDeviceID; } set { _PnpDeviceID = value; } }

        public string Description { get { return _Description; } set { _Description = value; } }

       

    }

}

的问候，
nidheesh