新对象在PowerShell 2上失败，找不到构造函数错误

Question

我在PowerShell 5上正常运行以下脚本

 $NetworkChange = New-Object System.Net.NetworkInformation.networkchange Register-ObjectEvent -InputObject $NetworkChange -EventName NetworkAddressChanged -SourceIdentifier "NetworkChanged" -Action { Write-Host "network switched" $LanConnected=@(Get-WmiObject win32_networkadapter -filter "netconnectionstatus = 2" | Where-Object {$_.netconnectionid -like "*Local Area Connection*"}) If($LanConnected){ Get-WmiObject win32_networkadapter -filter "netconnectionstatus = 2" | Where-Object {$_.netconnectionid -like "*Wireless Network Connection*"} | ForEach-Object {$_.disable()} } Else { Get-WmiObject win32_networkadapter | Where-Object {$_.netconnectionid -like "*Wireless Network Connection*"} | ForEach-Object {$_.enable()} } } 

但是，它在PowerShell 2上失败，并出现以下与New-Object cmdlet相关的错误

 New-Object : Constructor not found. Cannot find an appropriate constructor for type System.Net.NetworkInformation.networkchange. At line:1 char:11 + New-Object <<<< System.Net.NetworkInformation.networkchange + CategoryInfo : ObjectNotFound: (:) [New-Object], PSArgumentException + FullyQualifiedErrorId : CannotFindAppropriateCtor,Microsoft.PowerShell.Commands.NewObjectCommand 

知道为什么它会失败吗？ PowerShell 2上的New-Object cmdlet有不同的语法吗？

注意：我们的财产仍然在PowerShell 2上，因此需要进行努力。 提前致谢

史蒂夫

Answer 1

在PS5中，此代码如下：

$NetworkChange = [System.Net.NetworkInformation.NetworkChange]::new()

PS2说[System.Net.NetworkInformation.NetworkChange] doesn't contain a method named 'new'. 因此，我们可以通过创建变量“经典”方式来解决它：

New-Variable -Name NetworkChange -Value ([System.Net.NetworkInformation.NetworkChange])
$NetworkChange