powershell - PowerShell tr​​y-catch不起作用

Question

我正在处理脚本，想检查是否存在任务名称。
到目前为止看起来像这样:

try {
    Get-ScheduledTaskInfo -TaskName "taskname"
}
catch {
    echo "doesn't exist"
}

当我运行代码时，它将向我显示错误消息，而不是“不存在”:

PS C:\Windows\system32> try {
    Get-ScheduledTaskInfo -TaskName "taskname"
}
catch {
    echo "doesn't exist"
}
Get-ScheduledTaskInfo : The system cannot find the file specified.
At line:2 char:5
+     Get-ScheduledTaskInfo -TaskName "taskname"
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (PS_ScheduledTask:Root/Microsoft/...S_ScheduledTask) [Get-ScheduledTaskInfo], CimException
    + FullyQualifiedErrorId : HRESULT 0x80070002,Get-ScheduledTaskInfo

有人知道为什么不触发流行语吗？

谢谢你的帮助!

最好的祝福

Answer 1

try / catch only catches terminating errors:

Use Try, Catch, and Finally blocks to respond to or handle terminating errors in scripts

使用 -ErrorAction Stop将您的非终止错误变成终止错误:

Get-ScheduledTaskInfo -TaskName "taskname" -ErrorAction Stop