我怎么可以关联使用WMI和Delphi逻辑驱动器和物理磁盘？(How Can I Correlate

我已经有很长的，可以从微观，中读取信息的应用程序工作的一些（大多数）失败的更多的还是缺少一些，我与WMI和德尔福工作。 我现在面临的问题是，我需要列出属于每个HD，例如单位：HD1具有驱动器C :, d：等。

谢谢

Answer 1:

要关联的逻辑驱动器和物理磁盘必须使用Win32_DiskDrive类和Win32_DiskDriveToDiskPartition ， Win32_LogicalDiskToPartition ASSOCIATORS类。

试试这个样品。

{$APPTYPE CONSOLE}

uses
  SysUtils,
  ActiveX,
  ComObj,
  Variants;


function ListDrives : string;
var
  FSWbemLocator  : OLEVariant;
  objWMIService  : OLEVariant;
  colDiskDrives  : OLEVariant;
  colLogicalDisks: OLEVariant;
  colPartitions  : OLEVariant;
  objdiskDrive   : OLEVariant;
  objPartition   : OLEVariant;
  objLogicalDisk : OLEVariant;
  oEnumDiskDrive : IEnumvariant;
  oEnumPartition : IEnumvariant;
  oEnumLogical   : IEnumvariant;
  iValue         : LongWord;
  DeviceID       : string;
begin;
  Result:='';
  FSWbemLocator   := CreateOleObject('WbemScripting.SWbemLocator');
  objWMIService   := FSWbemLocator.ConnectServer('localhost', 'root\CIMV2', '', '');
  colDiskDrives   := objWMIService.ExecQuery('SELECT DeviceID FROM Win32_DiskDrive');
  oEnumDiskDrive  := IUnknown(colDiskDrives._NewEnum) as IEnumVariant;
  while oEnumDiskDrive.Next(1, objdiskDrive, iValue) = 0 do
   begin
      Writeln(Format('DeviceID %s',[string(objdiskDrive.DeviceID)]));
      //Escape the `\` chars in the DeviceID value because the '\' is a reserved character in WMI.
      DeviceID        := StringReplace(objdiskDrive.DeviceID,'\','\\',[rfReplaceAll]); 
      //link the Win32_DiskDrive class with the Win32_DiskDriveToDiskPartition class
      colPartitions   := objWMIService.ExecQuery(Format('ASSOCIATORS OF {Win32_DiskDrive.DeviceID="%s"} WHERE AssocClass = Win32_DiskDriveToDiskPartition',[DeviceID]));
      oEnumPartition  := IUnknown(colPartitions._NewEnum) as IEnumVariant;
      while oEnumPartition.Next(1, objPartition, iValue) = 0 do
      begin
       if not VarIsNull(objPartition.DeviceID) then
       begin
        Writeln(Format('   Partition %s',[string(objPartition.DeviceID)]));
        //link the Win32_DiskPartition class with theWin32_LogicalDiskToPartition class.
        colLogicalDisks := objWMIService.ExecQuery('ASSOCIATORS OF {Win32_DiskPartition.DeviceID="'+VarToStr(objPartition.DeviceID)+'"} WHERE AssocClass = Win32_LogicalDiskToPartition'); 
        oEnumLogical  := IUnknown(colLogicalDisks._NewEnum) as IEnumVariant;
          while oEnumLogical.Next(1, objLogicalDisk, iValue) = 0 do
          begin
              Writeln(Format('     Logical Disk %s',[string(objLogicalDisk.DeviceID)]));
              objLogicalDisk:=Unassigned;
          end;
       end;
       objPartition:=Unassigned;
      end;
       objdiskDrive:=Unassigned;
   end;
end;

begin
 try
    CoInitialize(nil);
    try
      ListDrives;
    finally
      CoUninitialize;
    end;
 except
    on E:Exception do
        Writeln(E.Classname, ':', E.Message);
  end;
  Readln;
end.

这将输出的东西，像这样

DeviceID \\.\PHYSICALDRIVE0
   Partition Disk #0, Partition #0
     Logical Disk F:
DeviceID \\.\PHYSICALDRIVE1
   Partition Disk #1, Partition #0
     Logical Disk C:

Answer 2:

使用MagWMi包装和它的一行功能（一个班轮是缓慢的 - 但不是在需要速度的地方）。 我用它来制作2级磁盘列表。

• 硬盘1 - >信1，2的信
• 硬盘2 - >函3，4的信
• NetServer的1 - >信5，6的信
• NetServer的2 - >信7，8的信
• 无法识别 - >所有其他字母

但你要记住，可能没有任何信件中使用某些磁盘。 因此，这将告诉你根目录的信息，但不多。 磁盘C：可催生到多个物理磁盘。 并且可以在不信的都可以使用一些物理磁盘。

unit WMI_Helper;

interface

function WMINetDiskName(const disk: string { 'C:' - w/o slash } ): string;
function WMIPhysDiskName(const disk: string { 'C:' - w/o slash } ): string;
function WMIGetVolumeName(const disk: string { 'C:' - w/o slash } ): string;

implementation

uses magwmi, SysUtils, StrUtils, Windows, IOUtils;

function WMIGetProp(const query, param, resultProp: string): string;
begin
  if MagWmiGetOneQ(StringReplace(query, '%s', param, []), resultProp, Result) <= 0
  then
    Result := '';
  Result := Trim(Result);
end;

function WMINetDiskName(const disk: string { 'C:' - w/o slash } ): string;
const
  req = 'select ProviderName from Win32_MappedLogicalDisk where DeviceID = "%s"';
  prop = 'ProviderName';
var
  i: integer;
begin
  Result := WMIGetProp(req, disk, prop);

  If not TPath.IsUNCPath(Result) then
    exit('');

  i := PosEx('\', TPath.GetPathRoot(Result), 3);
  if i <= 0 then
    exit('');

  SetLength(Result, i - 1);
end;

function WMIPhysDiskName(const disk: string { 'C:' - w/o slash } ): string;
const
  resultProp = 'DeviceID';
  reqPart = 'ASSOCIATORS OF {Win32_LogicalDisk.DeviceID="%s"} WHERE ResultClass=Win32_DiskPartition';
  reqDisk = 'ASSOCIATORS OF {Win32_DiskPartition.DeviceID="%s"} WHERE ResultClass=Win32_DiskDrive';
begin
  Result := WMIGetProp(reqPart, disk, resultProp);
  if Result > '' then
    Result := WMIGetProp(reqDisk, Result, resultProp);
end;

function WMIGetVolumeName(const disk: string { 'C:' - w/o slash } ): string;
const
  prop = 'VolumeName';
  reqNet = 'select VolumeName from Win32_MappedLogicalDisk where DeviceID = "%s"';
  reqPhy = 'select VolumeName from Win32_LogicalDisk where DeviceID = "%s"';

begin
  Result := WMIGetProp(IfThen(GetDriveType(PChar(disk)) = DRIVE_REMOTE, reqNet,
    reqPhy), disk, prop);
end;

end.

文章来源: How Can I Correlate Logical Drives and Physical Disks using the WMI and Delphi?