c++ - PropertyData 值数组

Question

我正在尝试通过 wmi 查询获取特定值。我知道这个值本身存储在一个数组中，但我无法访问它。

ManagementObjectSearcher ^searcher =
    gcnew ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_DiskDrive WHERE PNPDeviceID LIKE '" + marshal_as<String^>(DEV_FILTER) +"%'");

for each (ManagementObject ^drive in searcher->Get())
{
    for each (ManagementObject ^o in drive->GetRelated("Win32_DiskPartition"))
    {
        for each (ManagementObject ^logDisk in o->GetRelated("Win32_LogicalDisk"))
        {
            Console::WriteLine(
                "Disk: " + drive["Caption"] 
                + "\n\tSize        : " + drive["Size"]
                + "\n\tDriveLetter : " + logDisk["Name"] 
                + "\n\t" + drive["PNPDeviceID"]
                + "\n\tSerialNumber: " + drive["SerialNumber"]
                + "\n\t" + drive["Capabilities"]
                + "\n\tRevision    : " + drive["FirmwareRevision"]);
        }
    }
}

在调试调查中，我可以看到 drive["Capabilites"] 的每个值，但到目前为止我尝试过的所有内容，我都无法获得该数组的子值。

我想用 C++ 来做这个，感谢您的帮助。

Answer 1

要访问这些值，您必须转换属性和数组，然后遍历元素。试试这个 C++ CLI 示例代码。

#include "stdafx.h"
#using <system.management.dll>


using namespace System;
using namespace System::Management;

int main(array<System::String ^> ^args)
{
    ManagementObjectSearcher ^searcher =
        gcnew ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_DiskDrive");

    for each (ManagementObject ^drive in searcher->Get())
    {
        for each (ManagementObject ^o in drive->GetRelated("Win32_DiskPartition"))
        {
            for each (ManagementObject ^logDisk in o->GetRelated("Win32_LogicalDisk"))
            {
                Console::WriteLine(
                    "Disk: " + drive["Caption"]
                + "\n\tSize : " + drive["Size"]
                + "\n\tDriveLetter : " + logDisk["Name"]
                + "\n\t" + drive["PNPDeviceID"]
                + "\n\tSerialNumber: " + drive["SerialNumber"]
                + "\n\tRevision : " + drive["FirmwareRevision"]);
                Console::WriteLine("Capabilities");
                for each(UInt16 v in (array<UInt16>^)(drive->Properties["Capabilities"]->Value))
                {
                    Console::WriteLine(v);
                }
            }
        }
    }
    Console::ReadLine();
    return 0;
}