PowerShell 在 Param() 块中捕获异常

Question

Param(
    [ValidateRange(21,90)]
    [int[]]$Age
)

$age超出范围时如何捕获异常？

Answer 1

正如评论中所指出的，需要在调用上下文中捕获验证错误

try{
  .\Set-Age.ps1
}
catch [System.Management.Automation.ParameterBindingException] {
  Write-Host "Error thrown while attempting to bind an argument to parameter $($_.Exception.ParameterName), with message: $($_.Exeption.Message)"
}
catch {
  # something other than the parameter binder threw an exception
}