get drive letter( Win32_Diskdrive )

[sanjana]

hi
i m using the win32_diskdrive class for detecting a
memory card insertion and removal..and this class
detects memory card(sd card..etc) insertion removal from the device

the deviceid attribute gives me \\.\PHYSICALDRI VE0 or
\\.\PHYSICALDRI VE1
etc..

i m trying to get the drive name say(c: or d: ...etc)from the device
id
attribute returned above..

i found this code on the net which said wud get the
drive letter from the device id..

using(Managemen tClass devs = new ManagementClass (
@"Win32_Diskdri ve"))
{
ManagementObjec tCollection moc = devs.GetInstanc es();
foreach(Managem entObject mo in moc)
{
Console.WriteLi ne(mo["DeviceId"]);
foreach (ManagementObje ct b in
mo.GetRelated(" Win32_DiskParti tion"))
{
Console.WriteLi ne("{0}", b["Name"]);
foreach (ManagementBase Object c in
b.GetRelated("W in32_LogicalDis k"))
Console.WriteLi ne("{0}", c["Name"]);
}
}
}

but it dint work..it throws an error "NOT FOUND" AT THIS LINE:
foreach (ManagementObje ct b in mo.GetRelated(" Win32_DiskParti tion"))

any idea y am i getting this exception?
thanx

[Willy Denoyette [MVP]]

"sanjana" <su****@gmail.c om> wrote in message
news:11******** **************@ f14g2000cwb.goo glegroups.com.. .

hi
i m using the win32_diskdrive class for detecting a
memory card insertion and removal..and this class
detects memory card(sd card..etc) insertion removal from the device

the deviceid attribute gives me \\.\PHYSICALDRI VE0 or
\\.\PHYSICALDRI VE1
etc..

i m trying to get the drive name say(c: or d: ...etc)from the device
id
attribute returned above..

i found this code on the net which said wud get the
drive letter from the device id..

using(Managemen tClass devs = new ManagementClass (
@"Win32_Diskdri ve"))
{
ManagementObjec tCollection moc = devs.GetInstanc es();
foreach(Managem entObject mo in moc)
{
Console.WriteLi ne(mo["DeviceId"]);
foreach (ManagementObje ct b in
mo.GetRelated(" Win32_DiskParti tion"))
{
Console.WriteLi ne("{0}", b["Name"]);
foreach (ManagementBase Object c in
b.GetRelated("W in32_LogicalDis k"))
Console.WriteLi ne("{0}", c["Name"]);
}
}
}

but it dint work..it throws an error "NOT FOUND" AT THIS LINE:
foreach (ManagementObje ct b in mo.GetRelated(" Win32_DiskParti tion"))

any idea y am i getting this exception?

Probably because the disk is not partitioned!

Willy.

[sanjana]

hi
ya..its working fine..now i am getting the drive letter from the code
thanx...

just a small doubt i have
i get the drive letter whenever i insert the media card in the
particular drive..cf card or sd card..in the drive,..

but i dont get the drive letter when i remove the media card(sd/cf
card)
when i remove the card it gives me /.//physicaldrive1. .but doesent map
to the drive letter say (E:)

any reasons for this..?

i had done some cd insertion /removal event detection ..where i used to
get the drive letetr..even if the cd was removed and inserted..
then y does it not work similarly for media cards..

thanx for ur time and advice..


Willy Denoyette [MVP] wrote:

"sanjana" <su****@gmail.c om> wrote in message
news:11******** **************@ f14g2000cwb.goo glegroups.com.. .

hi
i m using the win32_diskdrive class for detecting a
memory card insertion and removal..and this class
detects memory card(sd card..etc) insertion removal from the device

the deviceid attribute gives me \\.\PHYSICALDRI VE0 or
\\.\PHYSICALDRI VE1
etc..

i m trying to get the drive name say(c: or d: ...etc)from the device
id
attribute returned above..

i found this code on the net which said wud get the
drive letter from the device id..

using(Managemen tClass devs = new ManagementClass (
@"Win32_Diskdri ve"))
{
ManagementObjec tCollection moc = devs.GetInstanc es();
foreach(Managem entObject mo in moc)
{
Console.WriteLi ne(mo["DeviceId"]);
foreach (ManagementObje ct b in
mo.GetRelated(" Win32_DiskParti tion"))
{
Console.WriteLi ne("{0}", b["Name"]);
foreach (ManagementBase Object c in
b.GetRelated("W in32_LogicalDis k"))
Console.WriteLi ne("{0}", c["Name"]);
}
}
}

but it dint work..it throws an error "NOT FOUND" AT THIS LINE:
foreach (ManagementObje ct b in mo.GetRelated(" Win32_DiskParti tion"))

any idea y am i getting this exception?

Probably because the disk is not partitioned!

Willy.

[Willy Denoyette [MVP]]

"sanjana" <su****@gmail.c om> wrote in message
news:11******** *************@g 43g2000cwa.goog legroups.com...

hi
ya..its working fine..now i am getting the drive letter from the code
thanx...

just a small doubt i have
i get the drive letter whenever i insert the media card in the
particular drive..cf card or sd card..in the drive,..

but i dont get the drive letter when i remove the media card(sd/cf
card)
when i remove the card it gives me /.//physicaldrive1. .but doesent map
to the drive letter say (E:)

any reasons for this..?

i had done some cd insertion /removal event detection ..where i used to
get the drive letetr..even if the cd was removed and inserted..
then y does it not work similarly for media cards..

thanx for ur time and advice..

The drive letter is asssigned when the card is present and formatted, that
is when a volume is mounted.
CD's are assigned fixed driver letters by the OS even when no CD is present,
memory cards are not.
Willy.

[sanjana]

hi
ok
got it
thanx

Willy Denoyette [MVP] wrote:

"sanjana" <su****@gmail.c om> wrote in message
news:11******** *************@g 43g2000cwa.goog legroups.com...

hi
ya..its working fine..now i am getting the drive letter from the code
thanx...

just a small doubt i have
i get the drive letter whenever i insert the media card in the
particular drive..cf card or sd card..in the drive,..

but i dont get the drive letter when i remove the media card(sd/cf
card)
when i remove the card it gives me /.//physicaldrive1. .but doesent map
to the drive letter say (E:)

any reasons for this..?

i had done some cd insertion /removal event detection ..where i used to
get the drive letetr..even if the cd was removed and inserted..
then y does it not work similarly for media cards..

thanx for ur time and advice..

The drive letter is asssigned when the card is present and formatted, that
is when a volume is mounted.
CD's are assigned fixed driver letters by the OS even when no CD is present,
memory cards are not.
Willy.