Visual C# -> WMI/ANY -> Volume Information (No LABEL, No Mountpoint)

i need list removable media only.

equipment / hardware:

• uas storage (usb -> scsi).
  
• usb attached (sd/md/etc) card controller.
• usb storage.
• nic attached storage.

partitioning:

• all devices has 3 or more partitions, commonly 4-5.
  
• 1 primary-active, second partitions primary or 4 primary/3 primary + 1 extended maximum.
• labels = often: null
• drive letters: can no mount point.
  

needed information wmic:

1. partitions or without mount point or label.
   
2. volume letters [if existing -> if not = partition position, size , type(primary / logical)].
3. order data start-end.

question:

do have easier way above listing going through wmi:

• win32_diskdrive -> win32_diskdrivetodiskpartition
  
• win32_controller
• win32_pnp -> ???
• win32_volume (still don't know find volume guid, 'mountvol' drive without mount point can't parse if there's more 1 partition without mount point).
  
• win32_logicaldisktopartition -> win32_logicaldisk

heck, counted that, if type whole query chain it's gonna take long execute can have dinner before program gets started. ;)

------edit #1------

found 1 unreliable solution wmi connection using registry.

path:

1. win32_disk....
2. win32_...controller
3. win32_pnpentity
4. registry, key: hkcu\software\microsoft\windows\currentversion\explorer\mountpoints2\cpc\volume\{volumeid}, value: data, reg_binary
   
5. win32_volume
   

wouldn't call reliable solution, see it, atm, solution looking through network people searching solution same problem. unless guru here can me bit. ;)

also looking @ kernel32.dll methods , 'getvolumenameforvolumemountpoint' similar topics mine requires either 'volume name' or 'drive letter' came bit more simplistic solution link wmi resources windows registry seems @ least @ systems being maintained device removal/insert. of course dump diskpart info , parse that.

------edit #2------

found bit better solution thru wmi namespace called: root\microsoft\windows\storage\providers_v2

as digging thru powershell solutions. namespace seems give:

• wsp_disk
• wsp_disktopartition
• wsp_partition
• wsp_partitiontovolume
• wsp_volume

which again linkable or usable directly. not sure how far these goes. have test xp / server variants.

since far searched web so, many howto's translate microsoft reg_binary -> text. here example visual c# code used try above linking. waste (but works ;p).

        private string regbintotext()         {             registrykey regkey = registry.currentuser.opensubkey("software").opensubkey("mycompany");             byte[] keys = (byte[])regkey.getvalue("regdata");             stringbuilder sb = new stringbuilder(keys.length * 2);             foreach (byte key in keys)             {                 sb.appendformat("{0:x2}", key);             }             string remzeros = sb.tostring().replace("00", "");             var builder = new stringbuilder();             (int = 0; < remzeros.length; += 2)             {                 string hexdec = remzeros.substring(i, 2);                 int number = int32.parse(hexdec, system.globalization.numberstyles.hexnumber);                 char chartoadd = (char)number;                 builder.append(chartoadd);             }             var splitter = builder.tostring().replace("starting_string", "\nstarting_string").replace("ending_string", "\nending_string");             string[] finalize_split = splitter.split('\n');             foreach(string final in finalize_split)             {                 return final;             }             return null;         }

basically, if want information 'final' string put if statement like:

if(final.startswith("yourlinestarts")) { string query = final; return query; }

inside foreach loop.

foreach(string final in finalize_split)

-- question --

does here know anyway build query escapes content below:

            try             {                 managementobjectsearcher searcher =                      new managementobjectsearcher("root\\cimv2",                      "select * win32_diskdrivetodiskpartition antecedent = \\\\computer\\root\\cimv2:win32_diskdrive.deviceid="\\\\\\\\.\\\\physicaldrive0"");                   foreach (managementobject queryobj in searcher.get())                 {                     console.writeline("-----------------------------------");                     console.writeline("win32_diskdrivetodiskpartition instance");                     console.writeline("-----------------------------------");                     console.writeline("antecedent: {0}", queryobj["antecedent"]);                     console.writeline("dependent: {0}", queryobj["dependent"]);                 }             }             catch (managementexception e)             {                 messagebox.show("an error occurred while querying wmi data: " + e.message);             }

this example directly microsoft wmi code creator failing content '\' clause/statement. yeah, been reading quite bit escaping , on, when escape correctly wmi returns: "invalid query"

?

correct looks like:

'"select * win32_diskdrivetodiskpartition antecedent = \\\\computer\\root\\cimv2:win32_diskdrive.deviceid = \"\\\\.\\physicaldrive0\""'

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