我一直在尝试在 powershell 中编写一个脚本，如果文件未通过 WinSCP 正确传输，则该脚本会重命名该文件。脚本看起来像这样：
# Variables
$error = 0
$currentFile = "test"
# Functions
function upload-files {
param(
$WinScpSession,
$LocalDirectory,
$FileType,
$RemoteDirectory
)
get-childitem $LocalDirectory -filter $FileType |
foreach-object {
# $_ gets the current item of the foreach loop.
write-output "Sending $_..."
$currentFile = "$($LocalDirectory)$($_)"
upload-file -WinScpSession $session -LocalDirectory "$($LocalDirectory)$($_)" -RemoteDirectory "$RemoteDirectory"
}
}
try
{
# Upload files
upload-files -WinScpSession $Session -LocalDirectory [PathToLocalDirectory] -FileType [FileType] -RemoteDirectory [PathToRemoteDirectoy]
}
catch
{
Write-Host "Error: $($_.Exception.Message)"
write-output $currentFile
$errorMoveLocation = copy-item -path "$currentFile" -destination "$currentFile.err" -passthru
Write-Host "Error File has been saved as $errorMoveLocation"
$error = 1
}
为了便于阅读，我删除了路径以及一些与该问题无关的 WinSCP 行。
当在upload-file函数之后添加一些破坏脚本的代码时，它将转到catch语句，我期望$currentFile变量是$($LocalDirectory)$($_)，因为它被捕获了再次设置变量后。然而，变量的实际值是其启动时的原始“测试”值。我尝试将 $currentFile 的范围更改为两个脚本，但全局相同的问题仍然发生。我对 powershell 还比较陌生，这超出了我的专业知识。任何帮助将不胜感激，谢谢！
upload-files
（大概还有
upload-file函数）仅发出非终止错误，而
try/
catch仅捕获终止错误。
upload-files
报告termination 错误，您有两个选择：
在调用它之前，（临时）将 $ErrorActionPreference
首选项变量设置为
'Stop'，这会将非终止错误提升为终止错误。
高级（类似 cmdlet）函数，这使其支持 -ErrorAction
公共参数，允许您在每次调用的基础上传递
-ErrorAction Stop以实现效果一样。
param(...)属性装饰函数的
[CmdletBinding()]块足以使其成为高级函数，使用单独参数
[Parameter()]属性也是如此。
实施(a)：
$oldErrorActionPref = $ErrorActionPreference
try
{
# Treat all errors as terminating
$ErrorActionPreference = 'Stop'
upload-files -WinScpSession $Session -LocalDirectory [PathToLocalDirectory] -FileType [FileType] -RemoteDirectory [PathToRemoteDirectoy]
}
catch
{
Write-Host "Error: $($_.Exception.Message)"
# ...
}
finally {
$ErrorActionPreference = $oldErrorActionPref
}
实施(b)：
# ...
function upload-files {
[CmdletBinding()] # NOTE: This makes your function an *advanced* one.
param(
$WinScpSession,
$LocalDirectory,
$FileType,
$RemoteDirectory
)
# ...
}
try
{
# Pass -ErrorAction Stop to treat all errors as terminating
upload-files -ErrorAction Stop -WinScpSession $Session -LocalDirectory [PathToLocalDirectory] -FileType [FileType] -RemoteDirectory [PathToRemoteDirectoy]
}
catch
{
Write-Host "Error: $($_.Exception.Message)"
# ...
}