Powershell: How to add values to Object with only 1 header - powershell

Question

Got a .ps where im getting alarmgroups from several files. Im trying to add them to an Object but the Problem is every new file hes adding another header into the Object. Is there a possibility, adding the header only 1 time. Append my data to the Object and when hes finished sorting the hole Object?
My Code.
$rootPath = $PSScriptRoot
if ($rootPath -eq "") {
$rootPath = Split-Path -Parent -Path $MyInvocation.MyCommand.Definition
}
$alarmPath = "$rootPath\Alarmgroups"
$mdi_alarms_template = "$rootPath\tmpl\mdi-alarms.tmpl.html"
$mdi_alarms = "$rootPath\mdi-alarms.html"
$fileNames = Get-ChildItem -Path $alarmPath -Filter *.algrp
$AlarmgroupIndexString = $LanguageIDString = $tmpString = $ID_string = $html_output= ""
$MachineCode = "Out_2.Alarm.Current"
$BitNo = $Element = $Format2Element = $Format3BitID =0
$BitID = $Format3TextID = 1
$list = New-Object System.Collections.ArrayList
Clear-Content "$rootPath\test.txt"
Clear-Content "$rootPath\list.txt"
Clear-Content "$rootPath\output.txt"
# Parse each alarm group file in the project
foreach ($file in $fileNames) {
$Content = [xml](Get-Content -Path $file.FullName)
$ns = New-Object System.Xml.XmlNamespaceManager($Content.NameTable)
$ns=#{asdf="http://asdf-automation.co.at/AS/VC/Project"}
$AlarmgroupIndex = Select-Xml -Xml $Content -XPath "//asdf[contains(#Name,'Index')]" -namespace $ns | select -ExpandProperty node
$AlarmgroupIndexString = $AlarmgroupIndex.Value
$AlarmgroupLanguageText = Select-Xml -Xml $Content -XPath "//asdf:TextLayer" -namespace $ns | select -ExpandProperty node
$AlarmgroupIndexMap = Select-Xml -Xml $Content -XPath "//asdf:Index" -namespace $ns | select -ExpandProperty node
$LUT =#{}
$AlarmgroupIndexMap | foreach{
$LUT.($_.ID) = $_.Value
}
$tmpArray =#()
$list = $AlarmgroupLanguageText | foreach{
$LanguageIDString = $_.LanguageId
$AlarmgroupTextLayer = Select-Xml -Xml $Content -XPath "//asdf:TextLayer[#LanguageId='$LanguageIDString']/asdf:Text" -namespace $ns | select -ExpandProperty node
$AlarmgroupTextLayer | foreach{
if($LUT.ContainsKey($_.ID))
{
$ID_string = $LUT[$_.ID]
}
[pscustomobject]#{
Language = $LanguageIDString
GroupID = $AlarmgroupIndexString
TextID = $ID_string #-as [int]
Text = $_.Value
}
$ID_string =""
}
$LanguageIDString=""
}
$list = $list |Sort-Object -Property Language, GroupID, {$_.TextID -as [int]}
# $list = $list |Sort-Object -Property #{Expression={$_.Language}}, #{Expression={$_.TextId}} , #{Expression={$_.TextID -as [int]}}
$list | Out-File "$rootPath\list.txt" -Append -Encoding utf8
Output:
GroupID Language TextID Text
------- -------- ------ ----
24 aa Group
24 aa 0
24 aa 1
24 aa 2
24 aa 3
24 aa 4
24 aa 5
24 aa 6
24 aa 7
24 aa 8
24 aa 9
24 aa 10
GroupID Language TextID Text
------- -------- ------ ----
24 ar Group
24 ar 0
24 ar 1
24 ar 2
24 ar 3
24 ar 4
24 ar 5
24 ar 6
24 ar 7
So i have several headers in my outputfile. Is it possible to erase them or add elements to the Object without the header. Tried several solution nothing worked.
If i understand it correctly im generating an Object and add it to an object with all values incl. header.
[pscustomobject]#{
Language = $LanguageIDString
GroupID = $AlarmgroupIndexString
TextID = $ID_string #-as [int]
Text = $_.Value

Answer 1

You can assign all the output from the foreach loop to a single variable and then move the file-write logic to the end of the script where you can output it all at once:
# Assign results of entire `foreach(){}` statement to `$combinedLists`
$combinedLists = foreach ($file in $fileNames) {
# XML navigation + object creation + assignment to `$list` still goes here
# We sort and then instead of assigning the output to a variable directly,
# we just let it "bubble up" from here to the `$combinedList` assignment
$list |Sort-Object -Property Language, GroupID, {$_.TextID -as [int]}
}
# Now we can write everything to file at once (overwrites existing contents)
$combinedLists |Out-File "$rootPath\list.txt" -Force -Encoding utf8