是否可以在Powershell中处理Get-AzureManagedCache异常？

Question

I am writing a script to setup a Redis cache in Azure. Prior to setting up a new cache, I want to check for its existence by running this:

    $cache = Get-AzureManagedCache -Name $cacheName 

If the cache doesn't exist, it outputs this "exception":

Get-AzureManagedCache : Cache Service 'PrototypeFOO' was not found At C:\\builds\\repos-scm\\branches\\2.6\\2.6.0\\scm\\AzureDeploymentSandbox\\Scripts\\Create-RedisCache.ps1:39 char:15 + $cache = Get-AzureManagedCache -Name $cacheName + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : CloseError: (:) [Get-AzureManagedCache], ArgumentException + FullyQualifiedErrorId : Microsoft.Azure.Commands.ManagedCache.GetAzureManagedCache

So I wrap it in a try/catch block like this:

try
{
    $cache = Get-AzureManagedCache -Name $cacheName 
}
catch 
{
    Write-Host "Catching the exception"
}

And when I run it, it skips right over the catch statement and keeps on processing. I am able to append "-EA SilentlyContinue" to the first line to suppress the message, but I am concerned that will suppress legit errors as well, so I would like to avoid that. Any thoughts on how to handle this exception?

Answer 1

Keep the try/catch block, but add -ErrorAction Stop to the Azure call.

Alternatively, you can set $ErrorActionPreference='Stop'; at the top of your script, which will automatically make all Errors act like they do in .NET.