檢查命令已成功運行

Question

我試着封閉在一個if語句下面，所以如果這個成功，我可以執行其他命令：

Get-WmiObject -Class Win32_Share -ComputerName $Server.name -Credential $credentials -Filter "Description='Default share'" | Foreach-Object { 
     $Localdrives += $_.Path 

，但我無法弄清楚如何做到這一點。我甚至嘗試創建一個函數，但我無法弄清楚如何檢查函數是否已成功完成。

Answer 1

你可以試試：

$res = get-WmiObject -Class Win32_Share -Filter "Description='Default share'" 
if ($res -ne $null) 
{ 
    foreach ($drv in $res) 
    { 
    $Localdrives += $drv.Path 
    } 
} 
else 
{ 
    # your error 
} 

Answer 2

嘗試$？自動變量：

$share = Get-WmiObject -Class Win32_Share -ComputerName $Server.name -Credential $credentials -Filter "Description='Default share'" 

if($?) 
{ 
    "command succeeded" 
    $share | Foreach-Object {...} 
} 
else 
{ 
    "command failed" 
} 

從about_Automatic_Variables：

$? 
    Contains the execution status of the last operation. It contains 
TRUE if the last operation succeeded and FALSE if it failed. 
... 

$LastExitCode 
    Contains the exit code of the last Windows-based program that was run.