Hi,
In MSDN document, you can find that Win32_LogicalDisk class is inherited
from CIM_LogicalDisk
class.
Because the ManagementObject you get from Win32_LogicalDisk not all have
the FreeSpace property
(Floppy disk and CDROM does not have this property value), you should check
every object's type before
retrieving the FreeSpace property.
Sample like this:
ManagementClass mc = new ManagementClass("Win32_LogicalDisk");
ManagementObjectCollection mco = mc.GetInstances();
foreach (ManagementObject mo in mco)
{
if(mo["DriveType"].ToString().Equals("3"))
{
MessageBox.Show( mo["FreeSpace"].ToString());
}
}
It works well on my machine, it will retrieve every hard disk's FreeSpace
on my machine.
Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! -
www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------
| From: "New World Order Pigs" <lt*******@md-it.com>
| References: <#B**************@TK2MSFTNGP09.phx.gbl>
<#r*************@TK2MSFTNGP09.phx.gbl>
<#j*************@TK2MSFTNGP11.phx.gbl>
<Jm**************@cpmsftngxa06.phx.gbl>
<eQ*************@TK2MSFTNGP10.phx.gbl>
<u3**************@TK2MSFTNGP09.phx.gbl>
| Subject: Re: disk space remaining?
| Date: Tue, 23 Sep 2003 11:11:32 -0600
| Lines: 198
| X-Priority: 3
| X-MSMail-Priority: Normal
| X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
| Message-ID: <Oq**************@TK2MSFTNGP10.phx.gbl>
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| Xref: cpmsftngxa06.phx.gbl microsoft.public.dotnet.languages.csharp:186799
| X-Tomcat-NG: microsoft.public.dotnet.languages.csharp
|
| I have discovered that "CIM_LogicalDisk" does work the way everyone else
| seems to use "WIN32_LogicalDrive"-- does anyone know why that would be?
Is
| this something I need to be concerned about as I deploy this code??? This
| all seems strange and I don't really trust it.
|
| NWOP
|
|
| "New World Order Pigs" <lt*******@md-it.com> wrote in message
| news:u3**************@TK2MSFTNGP09.phx.gbl...
| > Jeffrey, when I use your code verbatim I get the same thing. The "mo"
is
| > basically not initialized and there are error messages saying "error:
| cannot
| > obtain value," not sure what's going on here.
| >
| > NWOP
| >
| >
| > "New World Order Pigs" <lt*******@md-it.com> wrote in message
| > news:eQ*************@TK2MSFTNGP10.phx.gbl...
| > > Thanks Jeffrey. I can understand all of these points entirely. I
have
| > code
| > > that I've used that seems straight-forward and correct, but doesn't
| work--
| > > do you see anything wrong?
| > >
| > > ManagementClass mc = new ManagementClass("Win32_LogicalDisk");
| > > ManagementObjectCollection mco = mc.GetInstances();
| > > foreach (ManagementObject mo in mco)
| > > {
| > > i64 = mo["FreeSpace"];
| > > }
| > >
| > > This code snippet doesn't work and the "mo" objects don't seem to be
| > > initialized correctly.
| > >
| > > Thanks, NWOP.
| > >
| > > "Jeffrey Tan[MSFT]" <v-*****@online.microsoft.com> wrote in message
| > > news:Jm**************@cpmsftngxa06.phx.gbl...
| > > >
| > > > Hi,
| > > >
| > > > DirectoryInfo does not have GetFreeSpace method, because it is
design
| > for
| > > > regular directory(
| > > > It makes no sense referring FreeSpace for regular directory).
| > > >
| > > > The System.Management class provided a way of retreiving the
| information
| > > > from WMI, the
| > > > WMI's function is monument and strong, so I think there is no need
for
| > the
| > > > Net to create a new class or
| > > > method for this.(If .Net really create a new class, it will interop
| with
| > > > WMI under hood)
| > > >
| > > > If you still do not want to use the System.Management class, you can
| > refer
| > > > to the FileSystemObject, like this:
| > > >
| > > > Add the "Microsoft Scripting RunTIme 1.0" from the "Add Reference"
| > > command,
| > > > "COM" tab page,
| > > >
| > > > Scripting.FileSystemObject FSO = new
| Scripting.FileSystemObjectClass();
| > > > string [] logDrives=System.IO.Directory.GetLogicalDrives();
| > > > for ( int i =0;i< logDrives.GetUpperBound(0)+1;i++)
| > > > {
| > > > string disk=logDrives[i].Substring(0,2);
| > > > string param="Win32_LogicalDisk='"+disk+"'";
| > > > Scripting.Drive thisdrive=FSO.GetDrive(logDrives[i]);
| > > > if (thisdrive.DriveType==Scripting.DriveTypeConst.Fix ed )
| > > > {
| > > > MessageBox.Show(thisdrive.Path+" FreeSpace:"+thisdrive.FreeSpace );
| > > > }
| > > > }
| > > >
| > > > Hope this helps,
| > > > Best regards,
| > > > Jeffrey Tan
| > > > Microsoft Online Partner Support
| > > > Get Secure! -
www.microsoft.com/security
| > > > This posting is provided "as is" with no warranties and confers no
| > rights.
| > > >
| > > > --------------------
| > > > | From: "New World Order Pigs" <lt*******@md-it.com>
| > > > | References: <#B**************@TK2MSFTNGP09.phx.gbl>
| > > > <#r*************@TK2MSFTNGP09.phx.gbl>
| > > > | Subject: Re: disk space remaining?
| > > > | Date: Mon, 22 Sep 2003 17:02:35 -0600
| > > > | Lines: 69
| > > > | X-Priority: 3
| > > > | X-MSMail-Priority: Normal
| > > > | X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
| > > > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
| > > > | Message-ID: <#j*************@TK2MSFTNGP11.phx.gbl>
| > > > | Newsgroups: microsoft.public.dotnet.languages.csharp
| > > > | NNTP-Posting-Host: 64.207.45.130
| > > > | Path:
cpmsftngxa06.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTN GP11.phx.gbl
| > > > | Xref: cpmsftngxa06.phx.gbl
| > > microsoft.public.dotnet.languages.csharp:186661
| > > > | X-Tomcat-NG: microsoft.public.dotnet.languages.csharp
| > > > |
| > > > | Thanks Willy. I tried something similar to this and it didn't
seem
| to
| > > > work.
| > > > | I was hoping there was something in the .net libraries that
allowed
| a
| > > > direct
| > > > | function call and not the System.Management class. I'm still in a
| > state
| > > > of
| > > > | shock regarding this and just can't believe you can't just do
| > something
| > > > like
| > > > | "System.IO.DirectoryInfo.GetFreeSpace" or something similar...
| > > > |
| > > > | Thanks Willy. Apparently I have to keep playing with the System
| > > > Management
| > > > | class though.
| > > > |
| > > > |
| > > > | "Willy Denoyette [MVP]" <wi*************@pandora.be> wrote in
| message
| > > > | news:#r*************@TK2MSFTNGP09.phx.gbl...
| > > > | >
| > > > | > "New World Order Pigs" <lt*******@md-it.com> wrote in message
| > > > | news:%2****************@TK2MSFTNGP09.phx.gbl...
| > > > | > > Is there no way in .net to get disk space remaining for a
given
| > > > drive???
| > > > | I
| > > > | > > can't believe it and yet is seems to be so. If someone knows
of
| a
| > > way
| > > > | to do
| > > > | > > this in the .net libraries I'd be very much appreciative.
| > > > | > >
| > > > | > > Thanks, LT.
| > > > | > >
| > > > | > >
| > > > | >
| > > > | > You could use the Management namespace classes (and WMI).
| > > > | > Here's a small sample:
| > > > | >
| > > > | > using System;
| > > > | > using System.Management;
| > > > | > class Tester {
| > > > | > public static void Main() {
| > > > | > Int64 i = GetFreeSpace("C:");
| > > > | > Console.WriteLine(i);
| > > > | > }
| > > > | >
| > > > | > public static Int64 GetFreeSpace(string logicalDrive )
| > > > | > {
| > > > | > Int64 nRet = 0;
| > > > | > // Create a query
| > > > | > String strSQL = "SELECT FreeSpace FROM Win32_LogicalDisk
WHERE
| > > > | DeviceID='" + logicalDrive + "'" ;
| > > > | > try
| > > > | > {
| > > > | > SelectQuery query = new SelectQuery(strSQL);
| > > > | > ManagementObjectSearcher searcher = new
| > > > | ManagementObjectSearcher(query);
| > > > | >
| > > > | > foreach(ManagementBaseObject drive in searcher.Get())
| > > > | > {
| > > > | > UInt64 u = (UInt64)drive["FreeSpace"]; // Get freespace
| > > property
| > > > | > nRet = (Int64)u;
| > > > | > }
| > > > | >
| > > > | > }
| > > > | > catch (Exception e)
| > > > | > {
| > > > | > Console.WriteLine(e.ToString());
| > > > | > }
| > > > | > return nRet/1024; // return KB
| > > > | > } // GetFreeSpace
| > > > | >
| > > > | > }
| > > > | >
| > > > | > Willy.
| > > > | >
| > > > | >
| > > > |
| > > > |
| > > > |
| > > >
| > >
| > >
| >
| >
|
|
|
