Powershell 脚本在 try/catch block 中捕获的异常时停止； $ErrorActionPreference

Question

问题:powershell 脚本由于使用 $ErrorActionPreference 时应由 try 块捕获的异常而停止

例子:

$ErrorActionPreference = 'Stop'
try {
    ThisCommandWillThrowAnException
} catch {
    Write-Error 'Caught an Exception'
}
# this line is not executed. 
Write-Output 'Continuing execution'  

Answer 1

解决方案:Write-Error实际上默认抛出一个非终止异常。当$ErrorActionPreference = 'Stop'已设置，Write-Error在 catch 块中抛出一个终止异常。

使用 -ErrorAction 'Continue' 覆盖它

$ErrorActionPreference = 'Stop'
try {
    ThisCommandWillThrowAnException
} catch {
    Write-Error 'Caught an Exception' -ErrorAction 'Continue'
}
# this line is now executed as expected
Write-Output 'Continuing execution'