CreateFile("\\\\.\\"+driverName, GENERIC_READ, FILE_SHARE_READ, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);

使用 SafeFileHandle 类和非托管 CreateFile 函数打开 Win32 设备
1/**//// <summary>
2/// 使用 SafeFileHandle 类和非托管 CreateFile 函数打开 Win32 设备
3/// </summary>
4class UnmanagedDriverLoader
5{
6public const short FILE_ATTRIBUTE_NORMAL = 0x80;
7public const short INVALID_HANDLE_VALUE = -1;
8public const uint GENERIC_READ = 0x80000000;
9public const uint GENERIC_WRITE = 0x40000000;
10public const uint FILE_SHARE_READ = 0x00000001;
11public const uint CREATE_NEW = 1;
12public const uint CREATE_ALWAYS = 2;
13public const uint OPEN_EXISTING = 3;
14
15 [DllImport("kernel32.dll", SetLastError = true)]
16static extern SafeFileHandle CreateFile(string lpFileName, uint dwDesiredAccess,
17uint dwShareMode, IntPtr lpSecurityAttributes, uint dwCreationDisposition,
18uint dwFlagsAndAttributes, IntPtr hTemplateFile);
19
20private SafeFileHandle handleValue = null;
21
22public UnmanagedDriverLoader(string driverName)
23{
24 Load(driverName);
25 }
26
27public void Load(string driverName)
28{
29if (driverName == null && driverName.Length == 0)
30{
31throw new ArgumentNullException("driverName");
32 }
33
34 handleValue = CreateFile("\\\\.\\"+driverName, GENERIC_READ, FILE_SHARE_READ, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);
35
36if (handleValue.IsInvalid)
37{
38 Marshal.ThrowExceptionForHR(Marshal.GetLastWin32Error());
39 }
40 }
41
42public SafeFileHandle Handle
43{
44get
45{
46if (!handleValue.IsInvalid)
47{
48return handleValue;
49 }
50else
51{
52return null;
53 }
54 }
55 }
56 }

/**////10兆一个块
int bufferSize = 10240;
byte[] buffer = new byte[bufferSize];

/**////计算块的分页大小
long icount = (long)(GetCDROMSize(driverName) / bufferSize);
if ((GetCDROMSize(driverName) % bufferSize) != 0)
icount++;
long length = bufferSize;

hDriver.Seek(0, SeekOrigin.Begin);
hIso.Seek(0, SeekOrigin.Begin);

/**////遍历块写到文件
for (long i = 0; i < icount; i++)
{
hDriver.Read(buffer, 0, (int)length);
hIso.Write(buffer, 0, (int)length);

length = GetCDROMSize(driverName) - hDriver.Position;

if (OnProgress != null)
{
OnProgress(this, 0, GetCDROMSize(driverName), hIso.Length);
}
if (length > bufferSize)
length = bufferSize;
}

hDriver.Close();
hIso.Close();