Powershell变量获取“丢失”

Question

我正在处理一个脚本，该脚本监视错误文件夹并在发生错误时发送电子邮件。对于每个错误，我们在文件夹中获取两个文件，一个文本文件和一个xml。在电子邮件中，我想包括文本文件的全部内容和xml文件的部分内容。

在以下脚本中，我只获取文本文件的内容。 （用于发送电子邮件的行被注释掉以用于测试目的）。我已阅读有关变量和foreach，我想这可能是问题，但我仍然不知道如何解决这个问题在我的脚本。或者也许有更简单的方法来做到这一点？

$Foldertowatch = 'C:\lpos\invalidArts' 
$FilterXML = '*.xml' 
$FilterTXT = '*.txt' 

Unregister-Event -SourceIdentifier CreatedEventXML 
$fswXML = New-Object System.IO.FileSystemWatcher $Foldertowatch, $FilterXML 
$fswXML.EnableRaisingEvents=$true 
$fswXML.IncludeSubdirectories=$false 

Register-ObjectEvent -InputObject $fswXML -EventName Created -SourceIdentifier CreatedEventXML -Action { 
$Filename = $Event.SourceEventArgs.Name 
[XML]$XMLFile = (Get-Content $Foldertowatch\$Filename) 
$XMLtmp = foreach ($user in $XMLFile.POSLog.POSLogTransaction) 
{ 
$user.RetailStoreID 
$user.WorkStationID 
$user.OperatorID 
$user.SequenceNumber 
} 
} 

Unregister-Event -SourceIdentifier CreatedEventTXT 
$fswTXT = New-Object System.IO.FileSystemWatcher $Foldertowatch, $FilterTXT 
$fswTXT.EnableRaisingEvents=$true 
$fswTXT.IncludeSubdirectories=$false 

Register-ObjectEvent -InputObject $fswTXT -EventName Created -SourceIdentifier CreatedEventTXT -Action { 
$FilenameTXT = $Event.SourceEventArgs.Name 
$ContentTXT = (Get-Content $Foldertowatch\$FilenameTXT) -join "`n" 

write-host $user.retailstoreid 
Write-Host $contenttxt 

<#$From = "from@mail.com" 
$To = "to@mail.com" 
$SMTPServer = "mailserver.com" 
$subject = $env:COMPUTERNAME + " contains invalid ARTSXML"#> 
<#Write-Host "Store:" + $ContentXML.RetailStoreID + "`n" + "Workstation:" + $ContentXML.WorkStationID + "`n" +"Operator:" + $ContentXML.OperatorID + "`n" +"Receiptnumber:" + $ContentXML.sequencenumber + "`n" + "`n" + "Filelocation: $Foldertowatch\$FilenameTXT" + "`n" + "`n" + <#$ContentTXT##> 
<#$smtp = New-Object System.Net.Mail.SmtpClient($SMTPServer); 
$smtp.Send($From, $To, $subject, $body);#> 
} 

$ ContentXML是从早期尝试，现在应该是$ user。 我设法得到XML的内容，如果我像这样运行脚本的第一部分：

$Foldertowatch = 'C:\lpos\invalidArts' <# Folder to watch #> 
$FilterXML = '*.xml' <# Use *.xml #> 
$FilterTXT = '*.txt' <# Use *.txt for poslog2arts, use *.log for POS Reporting #> 

Unregister-Event -SourceIdentifier CreatedEventXML 
$fswXML = New-Object System.IO.FileSystemWatcher $Foldertowatch, $FilterXML 
$fswXML.EnableRaisingEvents=$true 
$fswXML.IncludeSubdirectories=$false 

Register-ObjectEvent -InputObject $fswXML -EventName Created -SourceIdentifier CreatedEventXML -Action { 
$Filename = $Event.SourceEventArgs.Name 
[XML]$XMLFile = (Get-Content $Foldertowatch\$Filename) 
$XMLtmp = foreach ($user in $XMLFile.POSLog.POSLogTransaction) 
{ 
write-host $user.RetailStoreID 
write-host $user.WorkStationID 
write-host $user.OperatorID 
write-hosts $user.SequenceNumber 
} 
} 

Answer 1

我不知道你的意图，但我看到一个可能的解决方案。首先，此代码：

$XMLtmp = foreach ($user in $XMLFile.POSLog.POSLogTransaction) 
{ 
    $user.RetailStoreID 
    $user.WorkStationID 
    $user.OperatorID 
    $user.SequenceNumber 
} 

您似乎再也没有使用过$ XMLtmp了。此外，它只是将包含字符串数组，不是有像$ user.RetailStoreID

属性你可以做的是这样的：

$users = @() 

Register-ObjectEvent -InputObject $fswXML -EventName Created -SourceIdentifier CreatedEventXML -Action { 
    $Filename = $Event.SourceEventArgs.Name 
    [XML]$XMLFile = (Get-Content $Foldertowatch\$Filename) 
    foreach ($user in $XMLFile.POSLog.POSLogTransaction) { 
    $users += $user 
    } 
} 

后来的后来，你可以索引该数组。有多个用户吗？你想发送多个电子邮件吗？

在这一点上，你可以做到以下几点：

$users | % { Write-Host $_.RetailStoreId } 

您在foreach() {}创建$用户变量超出范围（又名“消失”）时，}被击中。 $ XMLtmp是不必要的。在Action和foreach范围之外声明$users可确保它对整个脚本是全局的。