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after creating custom object, how can i add a new member ? what's wrong in the following code ?

Posted on 2015-01-06
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Last Modified: 2015-01-08
Hello!

I'm creating custom objects in a loop, my object has only two members. I can display, i know this part is working.
Then i want to add a third member, this time with Add-Member in the same loop.

the problem is that my third member is not display.

here's my function so far :


function Get_tshr_TestUsersInfos_InObject( [string]$aFilePath="M:\PS_scripts\machinesTest.otl" )
{
    $linesWithInfos = Get-Content $aFilePath

    $oMyCouples = @()

    foreach($lineOneMachine in $linesWithInfos)
      {
            $hostname = $lineOneMachine.Split(";")[0].Trim();
            $username = $lineOneMachine.Split(";")[1].Trim();

            $aCouple = New-Object -TypeName PSObject -Property ([Ordered] @{
                  "hostname3"=$hostname;
                  "username"=$username;
            })
       
        #$aCouple | Add-Member PropertySet -Name "Blabla" -Value 'adding extras infos'
        #$aCouple | Add-Member PropertySet -Name "enplus" @("adding extras infos")
        $aCouple | Add-Member PropertySet -Name "enplus" @("adding extras infos")
       
        $oMyCouples += $aCouple
      }

    return $oMyCouples
}

Here's what it display :
"hostname"      "username"
aHostName     aUserName
anotherHN      aSecName
....


no display of the third member.

thank you in advance for alll your help.

toshi
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Question by:toshi_
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3 Comments
 
LVL 39

Accepted Solution

by:
footech earned 500 total points
ID: 40533703
I think what you're trying to do is add another NoteProperty to the object.  So try the following:
$aCouple | Add-Member NoteProperty -Name "Blabla" -Value 'adding extras infos'

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Author Comment

by:toshi_
ID: 40533719
that's it !

thank you ... but can you just help me understading the diff between NoteProperty and PropoertySet `?

if you think this is another question i close and give you the points, but it would be nice to have some explanation. thank you in advance.

Toshi
0
 
LVL 39

Expert Comment

by:footech
ID: 40533774
If you take an object and input it to Get-Member, you can see existing properties and methods for the object. For example, try piping $aCouple to Get-Member ( $aCouple | gm ).  Or for an even better example, examine the output from
get-process | gm -force

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The following was taken from http://msdn.microsoft.com/en-us/library/system.management.automation.psmembertypes(v=vs.85).aspx
AliasProperty - A property that is an alias (new name) for another property of the object.
All - Any member of the PSObject object.
CodeMethod - A method that references a static method of the object.
CodeProperty - A property that references a static property of the object.
Dynamic - All dynamic members (where Windows PowerShell cannot determine the types of the members).
Event - An event of the PSObject object. This field is introduced in Windows PowerShell 2.0.
MemberSet - A predefined collection of properties and methods of the object, such as PSObject.
Method - A method of the underlying object.
Methods - All methods of the underlying object.
NoteProperty - A property of the object with a static value. Note that properties are defined as a name-value pair, such as "Color=Blue".
ParameterizedProperty - A property of the object that takes parameters and parameter values.
Properties - All properties of the object.
Property - A property of the underlying object.
PropertySet - A predefined collection of object properties.
ScriptMethod - A method whose value is the output of a script.
ScriptProperty - A property whose value is the output of a script.

It might also help you to review the full help for the Add-Member cmdlet.  With PS 3.0+ there is some alternative syntax for adding NoteProperties.
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