我的PowerShell异常没有被抓住 [英] My PowerShell exceptions aren't being caught

问题描述

Powershell v2：

Powershell v2:

try { Remove-Item C:\hiberfil.sys -ErrorAction Stop }
catch [System.IO.IOException]
{ "problem" }
catch [System.Exception]
{ "other" }

当然，我以休眠文件为例。实际上有一个文件，我希望我可能没有权限删除有时，我想抓住这种特殊情况。

I'm using the hibernation file as an example, of course. There's actually another file that I expect I may not have permission to delete sometimes, and I want to catch this exceptional situation.

输出：

output

c $ c> $ error [0] | fl * -Force 输出 System.IO.IOException：没有足够的执行权限。

and yet $error[0] | fl * -Force outputs System.IO.IOException: Not Enough permission to perform operation.

问题：我不明白为什么我没有捕获这个异常与我的第一个catch块，因为这符合异常类型。

Problem: I don't see why I'm not catching this exception with my first catch block, since this matches the exception type.

推荐答案

当您使用Stop操作PowerShell将异常的类型更改为：

When you use the Stop action PowerShell changes the type of the exception to:

[System.Management.Automation.ActionPreferenceStopException]

所以这是你应该抓到的。你也可以把它留下来，抓住所有的类型。
如果你想对不同的excideptions进行操作，请尝试一下：

So this is the what you should catch. You can also leave it out and catch all types. Give this a try if you want to opearte on different excdeptions:

try 
{
    Remove-Item C:\pagefile.sys -ErrorAction Stop
}
catch
{
    $e = $_.Exception.GetType().Name

    if($e -eq 'ItemNotFoundException' {...}
    if($e -eq 'IOException' {...}
}

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