タイトルの通り、ドライブがDVDドライブなのかCDドライブなのか判断しようとしています。繰り返しますが、私はメディアについてではなく、実際のドライブ自体について質問しています... DriveInfo クラスが指すオブジェクトです。
私は、DriveInfo クラスだけでは十分ではなく、代わりに WMI から Win32_DiskDrive インスタンスを取得して、そこを掘り下げる必要があると考えています。問題は、これまでに見つけたすべてのサンプルが検出されたメディアについて語っていることですが、DVD ドライブは CD メディアを使用できるため、それだけでは十分ではありません。さらに、メディアが存在するかどうかに関係なく、コードは機能するはずです。
WMI から取得できます。Win32_CDROMDrive クラス。
ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT MediaType FROM Win32_CDROMDrive");
ManagementObjectCollection collection = searcher.Get();
foreach (ManagementBaseObject obj in collection)
{
MessageBox.Show(obj["MediaType"].ToString());
}
BDRom などについて知る必要がある場合は、問題になります。WMI の代わりに NeroCmd ツールを使用することをお勧めします。
また、こちらをご覧ください。書き込みについてですが、ドライブのサポートされているメディアを見つけることができます。Blu-Ray メディアをサポートしている場合、明らかに CD-ROM ではありません :)
大事な部分だけを集めてみました。ここでは IMAPI2 API を使用してデバイス機能 (CD/DVD/BD/HDDVD-READ) を取得しています。BD と HDDVD をサポートする COMBO ドライブがあることは知っていますが、コードには示していません。
//
// Determine the current recording devices
//
MsftDiscMaster2 discMaster = null;
try
{
discMaster = new MsftDiscMaster2();
if (!discMaster.IsSupportedEnvironment)
return;
// Get drives
foreach (string uniqueRecorderId in discMaster)
{
IDiscRecorder2 discRecorder2 = new MsftDiscRecorder2();
discRecorder2.InitializeDiscRecorder(uniqueRecorderId);
// Show device mount drive and determine type
Console.WriteLine("Path: {0} Type: {1}", discRecorder2.VolumePathNames[0], CheckType(discRecorder2));
}
}
catch (COMException ex)
{
Console.WriteLine("Error:{0} - Please install IMAPI2", ex.ErrorCode);
}
finally
{
if (discMaster != null)
Marshal.ReleaseComObject(discMaster);
}
マジック^_^
// Determine type
static string CheckType(IDiscRecorder2 disc)
{
var features = disc.SupportedFeaturePages.Select(a => (IMAPI_FEATURE_PAGE_TYPE)a).ToArray();
if (features.Contains(IMAPI_FEATURE_PAGE_TYPE.IMAPI_FEATURE_PAGE_TYPE_HD_DVD_READ))
return "HD-DVD-ROM";
if (features.Contains(IMAPI_FEATURE_PAGE_TYPE.IMAPI_FEATURE_PAGE_TYPE_BD_READ))
return "BD-ROM";
if (features.Contains(IMAPI_FEATURE_PAGE_TYPE.IMAPI_FEATURE_PAGE_TYPE_DVD_READ))
return "DVD-ROM";
if (features.Contains(IMAPI_FEATURE_PAGE_TYPE.IMAPI_FEATURE_PAGE_TYPE_CD_READ))
return "CD-ROM";
return "Unknown";
}
相互運用...
/// <summary>
/// Microsoft IMAPIv2 Disc Master
/// </summary>
[ComImport]
[Guid("27354130-7F64-5B0F-8F00-5D77AFBE261E")]
[CoClass(typeof(MsftDiscMaster2Class))]
public interface MsftDiscMaster2 : IDiscMaster2 //, DiscMaster2_Event
{
}
[ComImport, ComSourceInterfaces("DDiscMaster2Events\0")]
[TypeLibType(TypeLibTypeFlags.FCanCreate)]
[Guid("2735412E-7F64-5B0F-8F00-5D77AFBE261E")]
[ClassInterface(ClassInterfaceType.None)]
public class MsftDiscMaster2Class
{
}
[ComImport]
[CoClass(typeof(MsftDiscRecorder2Class))]
[Guid("27354133-7F64-5B0F-8F00-5D77AFBE261E")]
public interface MsftDiscRecorder2 : IDiscRecorder2
{
}
[ComImport]
[Guid("2735412D-7F64-5B0F-8F00-5D77AFBE261E")]
[TypeLibType(TypeLibTypeFlags.FCanCreate)]
[ClassInterface(ClassInterfaceType.None)]
public class MsftDiscRecorder2Class
{
}
/// <summary>
/// IDiscMaster2 is used to get an enumerator for the set of CD/DVD (optical) devices on the system
/// </summary>
[ComImport]
[Guid("27354130-7F64-5B0F-8F00-5D77AFBE261E")]
[TypeLibType(TypeLibTypeFlags.FDual | TypeLibTypeFlags.FDispatchable | TypeLibTypeFlags.FNonExtensible)]
public interface IDiscMaster2
{
// Enumerates the list of CD/DVD devices on the system (VT_BSTR)
[DispId(-4), TypeLibFunc((short)0x41)]
IEnumerator GetEnumerator();
// Gets a single recorder's ID (ZERO BASED INDEX)
[DispId(0)]
string this[int index] { get; }
// The current number of recorders in the system.
[DispId(1)]
int Count { get; }
// Whether IMAPI is running in an environment with optical devices and permission to access them.
[DispId(2)]
bool IsSupportedEnvironment { get; }
}
/// <summary>
/// Represents a single CD/DVD type device, and enables many common operations via a simplified API.
/// </summary>
[ComImport]
[TypeLibType(TypeLibTypeFlags.FDual | TypeLibTypeFlags.FDispatchable | TypeLibTypeFlags.FNonExtensible)]
[Guid("27354133-7F64-5B0F-8F00-5D77AFBE261E")]
public interface IDiscRecorder2
{
// Ejects the media (if any) and opens the tray
[DispId(0x100)]
void EjectMedia();
// Close the media tray and load any media in the tray.
[DispId(0x101)]
void CloseTray();
// Acquires exclusive access to device. May be called multiple times.
[DispId(0x102)]
void AcquireExclusiveAccess(bool force, string clientName);
// Releases exclusive access to device. Call once per AcquireExclusiveAccess().
[DispId(0x103)]
void ReleaseExclusiveAccess();
// Disables Media Change Notification (MCN).
[DispId(260)]
void DisableMcn();
// Re-enables Media Change Notification after a call to DisableMcn()
[DispId(0x105)]
void EnableMcn();
// Initialize the recorder, opening a handle to the specified recorder.
[DispId(0x106)]
void InitializeDiscRecorder(string recorderUniqueId);
// The unique ID used to initialize the recorder.
[DispId(0)]
string ActiveDiscRecorder { get; }
// The vendor ID in the device's INQUIRY data.
[DispId(0x201)]
string VendorId { get; }
// The Product ID in the device's INQUIRY data.
[DispId(0x202)]
string ProductId { get; }
// The Product Revision in the device's INQUIRY data.
[DispId(0x203)]
string ProductRevision { get; }
// Get the unique volume name (this is not a drive letter).
[DispId(0x204)]
string VolumeName { get; }
// Drive letters and NTFS mount points to access the recorder.
[DispId(0x205)]
object[] VolumePathNames {[DispId(0x205)] get; }
// One of the volume names associated with the recorder.
[DispId(0x206)]
bool DeviceCanLoadMedia {[DispId(0x206)] get; }
// Gets the legacy 'device number' associated with the recorder. This number is not guaranteed to be static.
[DispId(0x207)]
int LegacyDeviceNumber {[DispId(0x207)] get; }
// Gets a list of all feature pages supported by the device
[DispId(520)]
object[] SupportedFeaturePages {[DispId(520)] get; }
// Gets a list of all feature pages with 'current' bit set to true
[DispId(0x209)]
object[] CurrentFeaturePages {[DispId(0x209)] get; }
// Gets a list of all profiles supported by the device
[DispId(0x20a)]
object[] SupportedProfiles {[DispId(0x20a)] get; }
// Gets a list of all profiles with 'currentP' bit set to true
[DispId(0x20b)]
object[] CurrentProfiles {[DispId(0x20b)] get; }
// Gets a list of all MODE PAGES supported by the device
[DispId(0x20c)]
object[] SupportedModePages {[DispId(0x20c)] get; }
// Queries the device to determine who, if anyone, has acquired exclusive access
[DispId(0x20d)]
string ExclusiveAccessOwner {[DispId(0x20d)] get; }
}
public enum IMAPI_FEATURE_PAGE_TYPE
{
IMAPI_FEATURE_PAGE_TYPE_PROFILE_LIST = 0,
IMAPI_FEATURE_PAGE_TYPE_CORE = 1,
IMAPI_FEATURE_PAGE_TYPE_MORPHING = 2,
IMAPI_FEATURE_PAGE_TYPE_REMOVABLE_MEDIUM = 3,
IMAPI_FEATURE_PAGE_TYPE_WRITE_PROTECT = 4,
IMAPI_FEATURE_PAGE_TYPE_RANDOMLY_READABLE = 0x10,
IMAPI_FEATURE_PAGE_TYPE_CD_MULTIREAD = 0x1d,
IMAPI_FEATURE_PAGE_TYPE_CD_READ = 0x1e,
IMAPI_FEATURE_PAGE_TYPE_DVD_READ = 0x1f,
IMAPI_FEATURE_PAGE_TYPE_RANDOMLY_WRITABLE = 0x20,
IMAPI_FEATURE_PAGE_TYPE_INCREMENTAL_STREAMING_WRITABLE = 0x21,
IMAPI_FEATURE_PAGE_TYPE_SECTOR_ERASABLE = 0x22,
IMAPI_FEATURE_PAGE_TYPE_FORMATTABLE = 0x23,
IMAPI_FEATURE_PAGE_TYPE_HARDWARE_DEFECT_MANAGEMENT = 0x24,
IMAPI_FEATURE_PAGE_TYPE_WRITE_ONCE = 0x25,
IMAPI_FEATURE_PAGE_TYPE_RESTRICTED_OVERWRITE = 0x26,
IMAPI_FEATURE_PAGE_TYPE_CDRW_CAV_WRITE = 0x27,
IMAPI_FEATURE_PAGE_TYPE_MRW = 0x28,
IMAPI_FEATURE_PAGE_TYPE_ENHANCED_DEFECT_REPORTING = 0x29,
IMAPI_FEATURE_PAGE_TYPE_DVD_PLUS_RW = 0x2a,
IMAPI_FEATURE_PAGE_TYPE_DVD_PLUS_R = 0x2b,
IMAPI_FEATURE_PAGE_TYPE_RIGID_RESTRICTED_OVERWRITE = 0x2c,
IMAPI_FEATURE_PAGE_TYPE_CD_TRACK_AT_ONCE = 0x2d,
IMAPI_FEATURE_PAGE_TYPE_CD_MASTERING = 0x2e,
IMAPI_FEATURE_PAGE_TYPE_DVD_DASH_WRITE = 0x2f,
IMAPI_FEATURE_PAGE_TYPE_DOUBLE_DENSITY_CD_READ = 0x30,
IMAPI_FEATURE_PAGE_TYPE_DOUBLE_DENSITY_CD_R_WRITE = 0x31,
IMAPI_FEATURE_PAGE_TYPE_DOUBLE_DENSITY_CD_RW_WRITE = 0x32,
IMAPI_FEATURE_PAGE_TYPE_LAYER_JUMP_RECORDING = 0x33,
IMAPI_FEATURE_PAGE_TYPE_CD_RW_MEDIA_WRITE_SUPPORT = 0x37,
IMAPI_FEATURE_PAGE_TYPE_BD_PSEUDO_OVERWRITE = 0x38,
IMAPI_FEATURE_PAGE_TYPE_DVD_PLUS_R_DUAL_LAYER = 0x3b,
IMAPI_FEATURE_PAGE_TYPE_BD_READ = 0x40,
IMAPI_FEATURE_PAGE_TYPE_BD_WRITE = 0x41,
IMAPI_FEATURE_PAGE_TYPE_HD_DVD_READ = 0x50,
IMAPI_FEATURE_PAGE_TYPE_HD_DVD_WRITE = 0x51,
IMAPI_FEATURE_PAGE_TYPE_POWER_MANAGEMENT = 0x100,
IMAPI_FEATURE_PAGE_TYPE_SMART = 0x101,
IMAPI_FEATURE_PAGE_TYPE_EMBEDDED_CHANGER = 0x102,
IMAPI_FEATURE_PAGE_TYPE_CD_ANALOG_PLAY = 0x103,
IMAPI_FEATURE_PAGE_TYPE_MICROCODE_UPDATE = 0x104,
IMAPI_FEATURE_PAGE_TYPE_TIMEOUT = 0x105,
IMAPI_FEATURE_PAGE_TYPE_DVD_CSS = 0x106,
IMAPI_FEATURE_PAGE_TYPE_REAL_TIME_STREAMING = 0x107,
IMAPI_FEATURE_PAGE_TYPE_LOGICAL_UNIT_SERIAL_NUMBER = 0x108,
IMAPI_FEATURE_PAGE_TYPE_MEDIA_SERIAL_NUMBER = 0x109,
IMAPI_FEATURE_PAGE_TYPE_DISC_CONTROL_BLOCKS = 0x10a,
IMAPI_FEATURE_PAGE_TYPE_DVD_CPRM = 0x10b,
IMAPI_FEATURE_PAGE_TYPE_FIRMWARE_INFORMATION = 0x10c,
IMAPI_FEATURE_PAGE_TYPE_AACS = 0x10d,
IMAPI_FEATURE_PAGE_TYPE_VCPS = 0x110
}
MSDN によると、IMAPI_FEATURE_PAGE_TYPE にはこの値以外を含めることができるため、注意が必要です。