Vista - InvokeMethod - Method Failure

Hi there,

When using the install Application example in the 'Windows Powershell
Primer' Pg. 93

(get-wmiobject -Computername <MachineName> -List | where-object
-filterscript {$_.Name -eq
"Win32_Product"}).InvokeMethod("Install","\\<Server>\<Share>\<FileName>.msi")

I get the error.
Method invocation failed because
[System.Management.ManagementClass#ROOT\cimv2\Win32_Product] doesn't contain
a method named 'InvokeMethod'.
At line:1 char:124

Anyone encountered this error?

Thanks,
jtsm

Hi,

There appears to be a problem with the documentation. Can you open a bug on
this issue at connect (http://connect.microsoft.com)?

To install an application using Win32_Product WMI class do the following:

([wmiclass]"win32_product").Install(<packagelocation>)

1. [wmiclass]"win32_product" will return an object of Type
System.Management.ManagementClass (with WMI classname = "win32_product")

PS C:\Documents and Settings\kriscv> $w32p = ([wmiclass]"win32_product")
PS C:\Documents and Settings\kriscv> $w32p | gm
TypeName: System.Management.ManagementClass#ROOT\cimv2\Win32_Product

2. Powershell engine adapts objects of type
System.Management.ManagementClass..and makes the properties/methods of the
underlying WMI class immediately available to the user.

PS C:\Documents and Settings\kriscv> $w32p | gm
TypeName: System.Management.ManagementClass#ROOT\cimv2\Win32_Product
Name MemberType Definition
---- ---------- ----------
Admin Method System.Management.ManagementBaseObject
Admin(System.String PackageLocation, System.Strin...
Advertise Method System.Management.ManagementBaseObject
Advertise(System.String PackageLocation, System.S...
Install Method System.Management.ManagementBaseObject
Install(System.String PackageLocation, System.Str...

3. To get original .net properties/methods of the adapted object use
"psbase" like

PS C:\Documents and Settings\kriscv> $w32p.psbase.GetType()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True ManagementClass
System.Management.ManagementObject


The following blog posts might help you understanding WMI support in
PowerShell

http://blogs.msdn.com/powershell/arc...26/647038.aspx
http://mow001.blogspot.com/2006/10/p...c2-series.html

--
Thanks
Krishna[MSFT]
Windows PowerShell Team
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.

"jtsm" <jtsm@discussions.microsoft.com> wrote in message
news:04373A64-A1FD-46CF-ABA0-4CE317225A19@microsoft.com...
> Hi there,
>
> When using the install Application example in the 'Windows Powershell
> Primer' Pg. 93
>
> (get-wmiobject -Computername <MachineName> -List | where-object
> -filterscript {$_.Name -eq
> "Win32_Product"}).InvokeMethod("Install","\\<Server>\<Share>\<FileName>.msi")
>
> I get the error.
> Method invocation failed because
> [System.Management.ManagementClass#ROOT\cimv2\Win32_Product] doesn't
> contain
> a method named 'InvokeMethod'.
> At line:1 char:124
>
> Anyone encountered this error?
>
> Thanks,
> jtsm
>

1) Just get rid o fthe InvokeMethod and call Install directly.
2) Consider doing it this way:
PS> ([wmiclass]"\\<Machine
Name>\root\cimv2:win32_product").Install("\\<Server>\<Share>\<FileName>.msi")
--
Jeffrey Snover [MSFT]
Windows PowerShell Architect
Microsoft Corporation
This posting is provided "AS IS" with no warranties, no confers rights.

Thanks guys, I've replace the invoke.

These appear to work fine from the local machine and will install. But fail
to install when trying to remotely install an MSI.