Vista - Powershell and .Net Object

Hi there,

Looks like from Powershell we cannot call the the public methods exposed by
a .Net Class. For example, System.Management.ManagementClass class has a
public method "GetInstances()". We can call it from C# code but not from
Powershell

PS > $mo = Get-WmiObject -class Win32_OperatingSystem
PS > $mo.GetIintances()
Method invocation failed because
[System.Management.ManagementObject#root\cimv2\Win32_OperatingSystem] doesn't
contain
a method named 'GetIintances'.
At line:1 char:17
+ $mo.GetIintances( <<<< )

Any Idea how poweshell determines which methods are available? I used to
think, it just uses .Net reflect to find out the available methods but if i
run
$mo | Get-Member

I don't see all the public methods exposed by
System.Management.ManagementClass


thx,
Nitin

as PowerShell uses a wrapper for WMI access You need to use PsBase to get to
the base Object

$mo.PsBase.GetIinstances()

Also I made a 3 part series (more still to come on my new blog) on my old
blog about the WMI wrapper :

http://mow001.blogspot.com/2006/10/p...c2-series.html
http://mow001.blogspot.com/2006/10/p...series_02.html
http://mow001.blogspot.com/2006/10/p...rt-in-rc2.html

Greetings /\/\o\/\/
http://thePowerShellGuy.com

"Nitin" <Nitin@discussions.microsoft.com> wrote in message
news:228AC0D8-6B54-4071-99DC-DE4441A56998@microsoft.com...
> Hi there,
>
> Looks like from Powershell we cannot call the the public methods exposed
> by
> a .Net Class. For example, System.Management.ManagementClass class has a
> public method "GetInstances()". We can call it from C# code but not from
> Powershell
>
> PS > $mo = Get-WmiObject -class Win32_OperatingSystem
> PS > $mo.GetIintances()
> Method invocation failed because
> [System.Management.ManagementObject#root\cimv2\Win32_OperatingSystem]
> doesn't
> contain
> a method named 'GetIintances'.
> At line:1 char:17
> + $mo.GetIintances( <<<< )
>
> Any Idea how poweshell determines which methods are available? I used to
> think, it just uses .Net reflect to find out the available methods but if
> i
> run
> $mo | Get-Member
>
> I don't see all the public methods exposed by
> System.Management.ManagementClass
>
>
> thx,
> Nitin
>

I see a typo $mo.GetIintances()

"Nitin" wrote:

> Hi there,
>
> Looks like from Powershell we cannot call the the public methods exposed by
> a .Net Class. For example, System.Management.ManagementClass class has a
> public method "GetInstances()". We can call it from C# code but not from
> Powershell
>
> PS > $mo = Get-WmiObject -class Win32_OperatingSystem
> PS > $mo.GetIintances()
> Method invocation failed because
> [System.Management.ManagementObject#root\cimv2\Win32_OperatingSystem] doesn't
> contain
> a method named 'GetIintances'.
> At line:1 char:17
> + $mo.GetIintances( <<<< )
>
> Any Idea how poweshell determines which methods are available? I used to
> think, it just uses .Net reflect to find out the available methods but if i
> run
> $mo | Get-Member
>
> I don't see all the public methods exposed by
> System.Management.ManagementClass
>
>
> thx,
> Nitin
>