我正在使用WMI来获取所有插入的USB磁盘制造商名称。代码工作得很好,但我有一个问题,我如何确定某个磁盘的女巫驱动器号...我只能得到设备名称,例如
(\\。\ PhysicalDrive1)...如何在正常的驱动器号中翻译它?
答案 0 :(得分:14)
如果您获得\\.\PHYSICALDRIVE1
之类的值意味着您正在使用Win32_DiskDrive
wmi类和DeviceID
属性,那么为了获取驱动器号,您必须使用ASSOCIATORS类,它将在wmi类之间创建一个链接,其中包含您要查找的信息(Win32_LogicalDisk
)和您正在使用的类(Win32_DiskDrive
)。
所以你必须做这样的事情
Win32_DiskDrive
- > Win32_DiskDriveToDiskPartition - > Win32_DiskPartition - > Win32_LogicalDiskToPartition - > Win32_LogicalDisk
检查此示例功能
{$APPTYPE CONSOLE}
uses
SysUtils,
ActiveX,
ComObj,
Variants;
function DeviceIDToDrive(const ADeviceID : string) : string;
var
FSWbemLocator : OLEVariant;
objWMIService : OLEVariant;
colLogicalDisks: OLEVariant;
colPartitions : OLEVariant;
objPartition : OLEVariant;
objLogicalDisk : OLEVariant;
oEnumPartition : IEnumvariant;
oEnumLogical : IEnumvariant;
iValue : LongWord;
DeviceID : string;
begin;
Result:='';
FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
objWMIService := FSWbemLocator.ConnectServer('localhost', 'root\CIMV2', '', '');
DeviceID := StringReplace(ADeviceID,'\','\\',[rfReplaceAll]); //Escape the `\` chars in the DeviceID value because the '\' is a reserved character in WMI.
colPartitions := objWMIService.ExecQuery(Format('ASSOCIATORS OF {Win32_DiskDrive.DeviceID="%s"} WHERE AssocClass = Win32_DiskDriveToDiskPartition',[DeviceID]));//link the Win32_DiskDrive class with the Win32_DiskDriveToDiskPartition class
oEnumPartition := IUnknown(colPartitions._NewEnum) as IEnumVariant;
while oEnumPartition.Next(1, objPartition, iValue) = 0 do
begin
if not VarIsNull(objPartition.DeviceID) then
begin
colLogicalDisks := objWMIService.ExecQuery('ASSOCIATORS OF {Win32_DiskPartition.DeviceID="'+VarToStr(objPartition.DeviceID)+'"} WHERE AssocClass = Win32_LogicalDiskToPartition'); //link the Win32_DiskPartition class with theWin32_LogicalDiskToPartition class.
oEnumLogical := IUnknown(colLogicalDisks._NewEnum) as IEnumVariant;
if oEnumLogical.Next(1, objLogicalDisk, iValue) = 0 then
begin
Result:=objLogicalDisk.DeviceID;
objLogicalDisk:=Unassigned;
end;
end;
objPartition:=Unassigned;
end;
end;
begin
try
CoInitialize(nil);
try
Writeln(DeviceIDToDrive('\\.\PHYSICALDRIVE2'));
finally
CoUninitialize;
end;
except
on E:Exception do
Writeln(E.Classname, ':', E.Message);
end;
Readln;
end.