Storage: C# equivalent of PowerShell command

Question

What is the C# equivalent to this PowerShell command?

PS C:\WINDOWS\system32> gwmi win32_DiskDrive | %{gwmi -query "ASSOCIATORS OF {$($_.__RELPATH)} where resultclass = Win32_PnpEntity" | %{gwmi -query "ASSOCIATORS OF {$($_.__RELPATH)}"}} | fl __CLASS,__RELPATH

The result of the above command is:

...
__CLASS   : Win32_SystemDriver
__RELPATH : Win32_SystemDriver.Name="disk"

__CLASS   : Win32_ComputerSystem
__RELPATH : Win32_ComputerSystem.Name="JMR-ENG-SARAH"

__CLASS   : Win32_IDEController
__RELPATH : Win32_IDEController.DeviceID="PCI\VEN_8086&DEV_8C82&SUBSYS_79171462&REV_00\3&11583659&0&FA"

__CLASS   : CIM_DataFile
__RELPATH : CIM_DataFile.Name="c:\windows\system32\drivers\disk.sys"

__CLASS   : Win32_DiskDrive
__RELPATH : Win32_DiskDrive.DeviceID="\\.\PHYSICALDRIVE1"


__CLASS   : Win32_SCSIController
__RELPATH : Win32_SCSIController.DeviceID="PCI\VEN_144D&DEV_A804&SUBSYS_A801144D&REV_00\6&381D8F6A&0&00080008"

__CLASS   : Win32_SystemDriver
__RELPATH : Win32_SystemDriver.Name="disk"

__CLASS   : Win32_ComputerSystem
__RELPATH : Win32_ComputerSystem.Name="JMR-ENG-SARAH"

__CLASS   : CIM_DataFile
__RELPATH : CIM_DataFile.Name="c:\windows\system32\drivers\disk.sys"

__CLASS   : Win32_DiskDrive
__RELPATH : Win32_DiskDrive.DeviceID="\\.\PHYSICALDRIVE2"
...

I guess what I do not understand is how the PowerShell command operates. I do know part of the translation.

            ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");

foreach (ManagementObject wmi_HD in searcher.Get())
{
    String driveDeviceId = wmi_HD["DeviceID"].ToString();
}

The above code is the gwmi win32_DiskDrive part. What property I need to extract is open to discussion. I know that there is a laundry list of returned properties.

I have another code fragment, where I get the drive letters associated with physical disks, which uses the ASSOCIATORS OF gwmi query. As such, the answer should be similar to:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Management;

String query2 = "ASSOCIATORS OF {Win32_DiskDrive.DeviceID='" + driveDeviceId + "'} WHERE AssocClass = Win32_DiskDriveToDiskPartition";
foreach (ManagementObject partition in new ManagementObjectSearcher(query2).Get())
{
    foreach (ManagementObject disk in new ManagementObjectSearcher(
                "ASSOCIATORS OF {Win32_DiskPartition.DeviceID='"
                    + partition["DeviceID"]
                    + "'} WHERE AssocClass = Win32_LogicalDiskToPartition").Get())
    {
        String diskMount = disk["Name"].ToString();
    }
}

The | is simply an embedded for-loop, where the inner wmi query would use the result of the other loop element. The query that I would like is a bit more complex with a double set of | and uses a double set of {$($_.__RELPATH)}.

How would I write the C# code for the desired PowerShell script at the top?

Storage: C# equivalent of PowerShell command

1 Answers