Internal/Invoke-TransponseObject.ps1

<#
.SYNOPSIS
Transpose properties of objects from columns to rows.
.DESCRIPTION
Transpose properties of objects from columns to rows. Useful when the order displayed in a GridView (with
Out-GridView) or in a CSV file (with Export-Csv) should be rotated.
It uses the name property as new property names (column headers) if it exists.
.INPUTS
Object
.OUTPUTS
Transposed object
.EXAMPLE
dir | Transpose-Object | Out-GridView
 
Shows directory listing with a column instead of a row for every file/directory
.EXAMPLE
ps | Transpose-Object | Export-Csv Processes.csv -Delimiter ';' -NoTypeInformation
 
Creates a CSV file with a column instead of a row for every process
.NOTES
Name: Transpose-Object
Author: Markus Scholtes
Version: 1.0 - Initial version
Creation Date: 01/11/2019
#>

function Invoke-TransposeObject
{ [CmdletBinding()]
  Param([OBJECT][Parameter(ValueFromPipeline = $TRUE)]$InputObject)

  BEGIN
  { # initialize variables just to be "clean"
    $Props = @()
    $PropNames = @()
    $InstanceNames = @()
  }

  PROCESS
  {
      if ($Props.Length -eq 0)
      { # when first object in pipeline arrives retrieve its property names
            $PropNames = $InputObject.PSObject.Properties | Select-Object -ExpandProperty Name
            # and create a PSCustomobject in an array for each property
            $InputObject.PSObject.Properties | ForEach-Object{ $Props += New-Object -TypeName PSObject -Property @{Property = $_.Name} }
        }

         if ($InputObject.M_DisplayName)
         { # does object have a "Name" property?
             $Property = $InputObject.M_DisplayName
         } else { # no, take object itself as property name
             $Property = $InputObject | Out-String
        }

         if ($InstanceNames -contains $Property)
         { # does multiple occurence of name exist?
          $COUNTER = 0
             do { # yes, append a number in brackets to name
                 $COUNTER++
                 $Property = "$($InputObject.M_DisplayName) ({0})" -f $COUNTER
             } while ($InstanceNames -contains $Property)
         }
         # add current name to name list for next name check
         $InstanceNames += $Property

      # retrieve property values and add them to the property's PSCustomobject
      $COUNTER = 0
      $PropNames | ForEach-Object{
          if ($InputObject.($_))
          { # property exists for current object
              $Props[$COUNTER] | Add-Member -Name $Property -Type NoteProperty -Value $InputObject.($_)
          } else { # property does not exist for current object, add $NULL value
              $Props[$COUNTER] | Add-Member -Name $Property -Type NoteProperty -Value $NULL
          }
             $COUNTER++
      }
  }

  END
  {
      # return collection of PSCustomobjects with property values
      $Props
  }
}
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# SIG # End signature block