Concat ArrayList: Method invocation failed because [System.Management.Automation.PSObject] does not contain a method named 'op_Addition'

Question

I am getting an error while concatenating the array lists in powershell.

  For ($i=0; $i -lt $temp.Length; $i++)
  {

    $filePath = $filePath.Replace("/", "\")
    $fileExt = $filePath.Split(".")[-1] 

     $Content = Get-Content -LiteralPath      $(Build.SourcesDirectory)\$name -Encoding $EncodingType
     $OutputFileContent += $Content
     $FileObject = New-Object PSobject -Property @{
            Path = $filePath
            Extension = $fileExt
            Contents = $OutputFileContent 
        }


   $changeSet += $FileObject
  }

The last line is causing this issue.

   Method invocation failed because [System.Management.Automation.PSObject]     does not contain a method named 'op_Addition'.

  $changeSet += $FileObject

  CategoryInfo          : InvalidOperation: (op_Addition:String) [], 
  ParentContainsErrorRecordException
FullyQualifiedErrorId : MethodNotFound

Is your script running successfully locally?

Cece Dong - MSFT
– Cece Dong - MSFT

2018-08-10 09:31:56 +00:00
Commented Aug 10, 2018 at 9:31 — Cece Dong - MSFT
– Cece Dong - MSFT, Commented Aug 10, 2018 at 9:31
What's $changeSet? How do you declare it?

Eddie Chen - MSFT
– Eddie Chen - MSFT

2018-08-13 08:57:43 +00:00
Commented Aug 13, 2018 at 8:57 — Eddie Chen - MSFT
– Eddie Chen - MSFT, Commented Aug 13, 2018 at 8:57

Daniel Mann · Accepted Answer · 2018-08-08 19:28:29Z

0

You can't add a PSObject to an ArrayList with the + operator. Use the Add method of ArrayList to append items to the list.

$changeSet.Add($fileObject)

answered Aug 8, 2018 at 19:28

Daniel Mann

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3 Comments

gopal Over a year ago

Still getting an error.

this FileObject @{Contents=System.Object[]; Extension=pkb; Path=.\Package\TEST_PKG_I_LOOKUPS2.pkb}   Method invocation failed because [System.Management.Automation.PSCustomObject] does not contain a method named 'add'. At /Users//Downloads/vsts-agent-osx-x64-2.136.1/Liquibase/_temp/63f184e0-db7e-4bbe-b130-8c2325d2b373.ps1:95 char:8       $Changeset.add($fileObject)  CategoryInfo          : InvalidOperation: (add:String) [], ParentContainsErrorRecordException FullyQualifiedErrorId : MethodNotFound

Daniel Mann Over a year ago

Then $changeSet is not an ArrayList. Are you sure the code you posted is the code you're running?

gopal Over a year ago

Its not ArrayList I was testing with ArrayList. I updated it now.

Prasoon Karunan V · Accepted Answer · 2018-08-09 05:11:06Z

0

@gopal,

Use the Power of PowerShell. You can simply do below without defining $changes

$changes = For ($i=0; $i -lt $temp.Length; $i++)
           {   

               $filePath = $filePath.Replace("/", "\")
               $fileExt = $filePath.Split(".")[-1] 

               $Content = Get-Content -LiteralPath $(Build.SourcesDirectory)\$name `
               -Encoding $EncodingType
               $OutputFileContent += $Content
               $FileObject = New-Object PSobject -Property @{
                                 Path = $filePath
                                 Extension = $fileExt
                                 Contents = $OutputFileContent 
                             }
           }

answered Aug 9, 2018 at 5:11

Prasoon Karunan V

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