在PowerShell v2中捕獲-Verbose開關的詳細輸出

Question

今天我遇到了一個有趣的問題，這使我感到困惑。 我需要從詳細流中捕獲輸出並將其寫入stdout。

可以這樣實現：

# Create a PowerShell Command 

$pscmd = [PowerShell]::Create() 

# Add a Script to change the verbose preference. 
# Since I want to make sure this change stays around after I run the command I set UseLocalScope to $false. 
# Also note that since AddScript returns the PowerShell command, I can simply call Invoke on what came back. 
# I set the return value to $null to suppress any output 

$null = $psCmd.AddScript({$VerbosePreference = "Continue"},$false).Invoke() 

# If I added more commands, I'd be adding them to the pipeline, so I want to clear the pipeline 

$psCmd.Commands.Clear() 

# Now that I've cleared the pipeline, I'll add another script that writes out 100 messages to the Verbose stream 

$null = $psCmd.AddScript({Write-verbose "hello World" }).Invoke() 

# Finally, I'll output the stream 

$psCmd.Streams.Verbose

現在有趣的部分是，如果我要創建一個名為Hello-World的函數並使用[CmdletBinding()]繼承-verbose開關，我將無法再捕獲輸出：

Function Hello-World {
    [CmdletBinding()]
    Param()

    Write-Verbose "hello world"
}

...
$null = $psCmd.AddScript({Hello-World -Verbose }).Invoke() 
...

我假設該函數具有自己的詳細流，並且對該流的可見性已丟失，但我並不肯定。 這和[CmdletBinding()]嗎？

避免成績單，有沒有辦法做到這一點？

謝謝！

Answer 1

謝謝@JasonMorgan，以下是似乎有效的解決方案。 我需要在我制作的pscmd中聲明該函數：

$pscmd = [PowerShell]::Create() 

$null = $psCmd.AddScript({$VerbosePreference = "Continue"},$false).Invoke()
$null = $psCmd.AddScript({
  function Hello-World {
    [CmdletBinding()]
    Param()
    Write-Verbose "hello world"
  }
}, $false).Invoke() 

$psCmd.Commands.Clear() 

$null = $psCmd.AddScript({Hello-World -Verbose }).Invoke() 

$psCmd.Streams.Verbose