powershell - Powershell invoke-command不处理try-cache block

Question

我有以下代码:

$output = foreach ($comp in $maschines.name) {
    invoke-command -computer comp1 -ScriptBlock {
        try
        {
            get-vm –VMName $using:comp | Select-Object VMId | Get-VHD | Select-Object @{ label = "vm"; expression = {$using:comp} }, 
            path,
            VhdType, 
            VhdFormat, 
            @{label = "file(gb)"; expression = {($_.FileSize / 1GB) -as [int]} }, 
            @{label = "size(gb)"; expression = {($_.Size / 1GB) -as [int]} }
        }
        catch
        {
            Write-Host some error
        }
    }
}

我不明白

some error

但:

> The operation failed because the file was not found.
>     + CategoryInfo          : ObjectNotFound: (Microsoft.Hyper...l.VMStorageTask:VMStorageTask) [Ge     t-VHD],
> VirtualizationOperationFailedException
>     + FullyQualifiedErrorId : ObjectNotFound,Microsoft.Vhd.PowerShell.GetVhdCommand
>     + PSComputerName        : comp1

我怎样才能得到

some error

在教练块？

Answer 1

为了触发catch块，需要终止异常(PowerShell同时具有终止和非终止错误)。

若要强制终止来自cmdlet的错误，可以将-ErrorAction参数与Stop用作值:

$output = foreach ($comp in $maschines.name) {
    invoke-command -computer comp1 -ScriptBlock {
        try
        {
            get-vm –VMName $using:comp -ErrorAction Stop | Select-Object VMId | Get-VHD | Select-Object @{ label = "vm"; expression = {$using:comp} }, 
            path,
            VhdType, 
            VhdFormat, 
            @{label = "file(gb)"; expression = {($_.FileSize / 1GB) -as [int]} }, 
            @{label = "size(gb)"; expression = {($_.Size / 1GB) -as [int]} }
        }
        catch
        {
            Write-Host some error
        }
    }
}