Powershell class's method's, propertis availability

Question

Powershell class's method's, propertis availability

Norbert Pozsonyi 1

So when i would call a method of Win32_NetworkAdapterConfiguration class

Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration |?{$_.Description -match ".?Miniport.?"} -OutVariable iuz

with Where-object i get the properies correctly but how can i call the Description with sorter format
something like that

[Win32_NetworkAdapterConfiguration]::[Notation] for that what is the sintax?

So how can i call methods, properties through class name?

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3 answers

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Answer 1

Hi,

The :: operator only works with static members of .net framework classes. To call methods of WMI classes you can use the Invoke-WmiMethod cmdlet.
https://learn.microsoft.com/en-us/powershell/scripting/samples/using-static-classes-and-methods

Best Regards,
Ian Xue

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Answer 2

Norbert Pozsonyi 1

Thank you for answear and if i write a expression like [Class]::Method() . When we use this in cas of traditional objects?

Can you help me and Make an example?

Rich Matheisen 48,116 Reputation points

2021-03-22T19:36:45.913+00:00
Sure:

[DateTime]::Now
Rich Matheisen 48,116 Reputation points

2021-03-23T19:09:24.823+00:00

The example you gave ("[Class]::Method()") is using a "class" method, not an "instance" method. You'd have to create an object before you used its methods.

An example of using a class method might be [Math]::pow(2,3) to find the cube of 2. The only object that will be created is the value returned.
Norbert Pozsonyi 1 Reputation point

2021-03-27T16:28:52.687+00:00

And how to prepere an object as instance from it?

It is the "New-Object" cmdlet right? and how to use it in case? What is the difference between Com And .Net object which can be created by this cmdlet?

I am not know anything from com objects.... and other types?
Rich Matheisen 48,116 Reputation points

2021-03-27T18:57:08.43+00:00

The "New-Object" cmdlet is one way to instantiate an object. But every class that's designed to create an instance will have a constructor (or perhaps several constructors).

In many languages the constructor is usually named "new". Perl, for example might create an instance like this "$hlector = Human::Cannibal->new()" or "$hlector = new Human::Cannibal" (depending on whether you prefer to work with indirect notation, or not). Using PowerShell you'd use "$hlector = New-Object Human.Cannibal" or "$hlector = [Human.Cannibal]::new()".

After creating an instance of the object, the object's instance methods are accessible for use. If the instances of "Human.Cannibal" had instance methods like "feed" or "moveto" you could use them like this: $hlector.feed('Zak') or $hlector.moveto('New York')
Rich Matheisen 48,116 Reputation points

2021-03-27T19:01:17.54+00:00

The Component Object Model (COM) can be described as a horror show! It allowed interaction between processes and for the manipulation of binary objects like Microsoft Word and Excel. It also used Object Linking and Embedding (OLE).

component-object-model--com--portal

Answer 3

WMI classes aren't the same as a traditional "object" class. The WMI class identifies the type (or class) of "thing" (or "things") you want information from (or about). Unlike "object" classes they have no constructors and no class methods. The WMI (or CIM) returns objects that represent the state of the "thing". The objects returned have both properties and methods.

If all you want is the object's "Description" property you could do something like this:

Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration | 
    Where-Object description -like "*miniport*" | 
        Select-Object Description

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Powershell class's method's, propertis availability

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