如何使用VBScript获取XML元素？

Question

给出以下XML代码段：

<?xml version="1.0" encoding="utf-8"?>
<unattend xmlns="urn:schemas-microsoft-com:unattend">
    <settings pass="specialize">
        <component name="Microsoft-Windows-Shell-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <OEMInformation>
                <Manufacturer>Microsoft</Manufacturer>
            </OEMInformation>
        </component>
        <component name="Microsoft-Windows-Deployment" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
        </component>
    </settings>
    <settings pass="windowsPE">
        <component name="Microsoft-Windows-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <DiskConfiguration>
                <!-- Format disk 0 using UEFI partitioning -->
                <Disk wcm:action="add">
                    <CreatePartitions>
                        <!-- Windows RE Tools partition -->
                        <CreatePartition wcm:action="add">
                            <Order>1</Order>
                            <Size>300</Size>
                            <Type>Primary</Type>
                        </CreatePartition>
                        <!-- System partition (ESP) -->
                        <CreatePartition wcm:action="add">
                            <Order>2</Order>
                            <Size>100</Size>
                            <Type>EFI</Type>
                        </CreatePartition>
                        <!-- Microsoft reserved partition (MSR) -->
                        <CreatePartition wcm:action="add">
                            <Order>3</Order>
                            <Size>128</Size>
                            <Type>MSR</Type>
                        </CreatePartition>
                        <!-- Windows partition -->
                        <CreatePartition wcm:action="add">
                            <Order>4</Order>
                            <Extend>true</Extend>
                            <Type>Primary</Type>
                        </CreatePartition>
                    </CreatePartitions>
                    <ModifyPartitions>
                        <!-- Windows RE Tools partition -->
                        <ModifyPartition wcm:action="add">
                            <Order>1</Order>
                            <PartitionID>1</PartitionID>
                            <Label>WINRE</Label>
                            <Format>NTFS</Format>
                            <TypeID>de94bba4-06d1-4d40-a16a-bfd50179d6ac</TypeID>
                        </ModifyPartition>
                        <!-- System partition (ESP) -->
                        <ModifyPartition wcm:action="add">
                            <Order>2</Order>
                            <PartitionID>2</PartitionID>
                            <Label>System</Label>
                            <Format>FAT32</Format>
                        </ModifyPartition>
                        <!-- Microsoft reserved partition (MSR) -->
                        <ModifyPartition wcm:action="add">
                            <Order>3</Order>
                            <PartitionID>3</PartitionID>
                        </ModifyPartition>
                        <!-- Windows partition -->
                        <ModifyPartition wcm:action="add">
                            <Order>4</Order>
                            <PartitionID>4</PartitionID>
                            <Label>Windows</Label>
                            <Format>NTFS</Format>
                        </ModifyPartition>
                    </ModifyPartitions>
                    <DiskID>0</DiskID>
                    <WillWipeDisk>true</WillWipeDisk>
                </Disk>
                <WillShowUI>OnError</WillShowUI>
            </DiskConfiguration>
            <ImageInstall>
                <OSImage>
                    <InstallFrom>
                        <Path>E:\install.wim</Path>
                    </InstallFrom>
                    <InstallToAvailablePartition>true</InstallToAvailablePartition>
                </OSImage>
            </ImageInstall>
        </component>
    </settings>
</unattend>

如何获取<DiskID>元素？我尝试了以下

Set xmlDoc = CreateObject("Msxml2.DOMDocument")
xmlDoc.SetProperty "SelectionLanguage", "XPath"
xmlDoc.Load("Autounattend.xml")
'Find DiskID Value
Set xDiskID = xmlDoc.SelectSingleNode("//DiskID")
WScript.Echo xDiskID.Text

但这似乎不起作用。我也尝试过

Set xmlDoc = CreateObject("Msxml2.DOMDocument")
xmlDoc.SetProperty "SelectionLanguage", "XPath"
xmlDoc.Load("Autounattend.xml")
'Find DiskID Value
Set xDiskID = xmlDoc.SelectSingleNode("/unattend/settings[@pass='windowsPE']/component[@name='Microsoft-Windows-Setup']/DiskConfiguration/Disk/DiskID")
WScript.Echo xDiskID.Text

但这似乎也不起作用。我认为//DiskID应该起作用，因为它是唯一具有该名称的元素。该代码似乎可以使用更简化的XML文件。