PowerShell tr​​y-catch 不起作用 [英] PowerShell try-catch isn't working

问题描述

我正在编写脚本并想检查任务名称是否存在.到目前为止看起来像这样:

I'm working on a script and want to check, if a taskname is existing. It looks so far like this:

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

当我运行代码时，它会向我打印错误消息而不是不存在":

When I run the code, it prints me the error message and not "doesn't exist":

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

有人知道为什么没有触发标语吗?

Does anybody has an idea why the catch phrase is not triggered?

感谢您的帮助！

最好的问候

推荐答案

try/catch 只捕获终止错误:

try/catch only catches terminating errors:

使用 Try、Catch 和 finally 块来响应或处理脚本中的终止错误

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

使用 -ErrorAction Stop 将您的非终止错误转变为终止错误:

Use -ErrorAction Stop to turn your non-terminating error into a terminating error:

Get-ScheduledTaskInfo -TaskName "taskname" -ErrorAction Stop

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