All geek questions in one place

How can I determine if the optical drive (and not the drive) is a CD or a DVD drive?

As indicated in the title, I am trying to determine if there is a DVD drive or a CD drive. Again, I'm not asking about the media, I'm asking about the drive itself ... the object that the DriveInfo class points to.

I think the DriveInfo class is not enough, and instead I will have to get a Win32_DiskDrive instance from WMI and dig it out. The problem is that all the samples that I have found so far speak of the detected media, but the DVD drive can use CD media so that is not enough. In addition, the code should work whether or not media is present.

+5
source share
1 answer

You can get it from WMI. Win32_CDROMDrive class.

ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT MediaType FROM Win32_CDROMDrive"); ManagementObjectCollection collection = searcher.Get(); foreach (ManagementBaseObject obj in collection) { MessageBox.Show(obj["MediaType"].ToString()); }

This will be a problem if you need to know about BDRom, etc. I recommend using NeroCmd tools instead of WMI.

You can also try looking here . It's about burning, but there you can find supported disk media. If it supports Blu-ray media, then this is obviously not a CD-ROM :)

I tried to get only the important parts. Here we use the IMAPI2 API to get device functions (CD / DVD / BD / HDDVD-READ). I know that there are COMBO disks that support BD and HDDVD, but I do not show them in the code.

 // // 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); }

Magic ^ _ ^

 // 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"; }

Interop ...

 /// <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 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 INQUIRY data. [DispId(0x201)] string VendorId { get; } // The Product ID in the device INQUIRY data. [DispId(0x202)] string ProductId { get; } // The Product Revision in the device 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 }

According to MSDN, IMAPI_FEATURE_PAGE_TYPE may not only contain these values, so be careful.

+1
source

Source: https://habr.com/ru/post/1232383/

More articles:


All Articles