Question

function getinfo {
    $strComputer = "localhost"
    $colItems = GWMI -cl "Win32_NetworkAdapterConfiguration" -name "root\CimV2" -comp $strComputer -filter "IpEnabled = TRUE"
    $Items1 = $colItems | Select DHCPServer, Caption, DNSHostName, IPAddress
    $Items2 = $colItems | Select ServiceName, MacAddress, IPSubnet, InterfaceIndex
}
$objects = (New-Object PSObject |
               add-member -pass NoteProperty "DHCP Server" $Items1.DHCPServer |
               add-member -pass NoteProperty "IP Address" $Items1.IPAddress | 
               add-member -passthru NoteProperty "Mac Address" $Items2.MacAddress | 
               add-member -passthru NoteProperty "IP Subnet" $Items2.IPSubnet
                )
$objects | ConvertTo-Json

我对-pass＆amp; -passthru个键。有什么区别，为什么在-passthru使用$Items1时没有填充任何内容？

Answer 1

问题不在于-pass或-passthru。问题是函数内部创建的变量通常仅在该函数仍在运行时才可用。来自about_Scopes的帮助：

Windows PowerShell保护对变量，别名，函数的访问，和Windows PowerShell驱动器（PSDrives）通过限制它们的位置阅读和更改。

如果您通过using dot-source调用该函数，则可以保留变量可用于New-Object命令。

function getinfo {
    $strComputer = "localhost"
    $colItems = GWMI -cl "Win32_NetworkAdapterConfiguration" -name "root\CimV2" -comp $strComputer -filter "IpEnabled = TRUE"
    $Items1 = $colItems | Select DHCPServer, Caption, DNSHostName, IPAddress
    $Items2 = $colItems | Select ServiceName, MacAddress, IPSubnet, InterfaceIndex
}
. getinfo
$objects = (New-Object PSObject |
               add-member -pass NoteProperty "DHCP Server" $Items1.DHCPServer |
               add-member -pass NoteProperty "IP Address" $Items1.IPAddress | 
               add-member -passthru NoteProperty "Mac Address" $Items2.MacAddress | 
               add-member -passthru NoteProperty "IP Subnet" $Items2.IPSubnet
                )
$objects | ConvertTo-Json

PowerShell PSObject在-pass和amp;之间的混淆-PassThru

1 个答案: