Question

在PowerShell脚本中，我想制作脚本对Start-Transcript所做的任何事情的记录。但是，有时脚本失败，并且脚本已经在运行。在这种情况下，会抛出错误，我无法找到避免该错误的方法。 我可以做些什么才能安全地启动成绩单？

如果成绩单已在运行，我想简单地停止并开始新的成绩单。

错误可以通过故意开始两个成绩单来再现。请记住，在现实生活中，上一次运行的脚本已经打开了成绩单。

错误情况

PS C:\> Start-Transcript c:\test.txt # pretend that this is a transcript which was not stopped properly by a previous script

Transcript started, output file is c:\test.txt

PS C:\> Start-Transcript c:\test.txt
Start-Transcript : Transcription cannot be started.
At line:1 char:1
+ Start-Transcript c:\test.txt
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Start-Transcript], PSInvalidOperationException
    + FullyQualifiedErrorId : CannotStartTranscription,Microsoft.PowerShell.Commands.StartTranscriptCommand

忽略使用-ErrorAction SilentlyContinue不起作用！

PS C:\> Start-Transcript c:\test.txt # pretend that this is a transcript which was not stopped properly by a previous script
Transcript started, output file is c:\test.txt

PS C:\> Start-Transcript c:\test.txt -ErrorAction SilentlyContinue
Start-Transcript : Transcription cannot be started.
At line:1 char:1
+ Start-Transcript c:\test.txt -ErrorAction SilentlyContinue
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Start-Transcript], PSInvalidOperationException
    + FullyQualifiedErrorId : CannotStartTranscription,Microsoft.PowerShell.Commands.StartTranscriptCommand

如果成绩单没有运行，在开始之前停止成绩单会失败

PS C:\> Start-Transcript c:\test.txt
Transcript started, output file is c:\test.txt

PS C:\> Stop-Transcript  # pretend that this is a transcript which was not stopped properly by a previous script
Transcript stopped, output file is C:\test.txt

PS C:\> Stop-Transcript
Stop-Transcript : An error occurred stopping transcription: The host is not currently transcribing.
At line:1 char:1
+ Stop-Transcript
+ ~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Stop-Transcript], PSInvalidOperationException
    + FullyQualifiedErrorId : InvalidOperation,Microsoft.PowerShell.Commands.StopTranscriptCommand

Answer 1

所以，我在PS 5.0上的所有测试（这是我目前唯一可以访问的）显示，使用相同的输出文件名再次启动脚本会抛出你提到的错误，但也会停止脚本。之后手动试图阻止它会告诉我The host is not currently transcribing。

所以，我认为您可以使用try catch方法来抑制错误：

Try{Start-transcript C:\transcript.txt -ErrorAction Stop}catch{Start-Transcript C:\transcript.txt}

转录已在运行时出现PowerShell Transcript错误

1 个答案: