“Invisible” methods for ADSI?

RC2’s new [ADSI] type shortcut showed up without any methods, only properties, causing quite a bit of confusion, given that a lot of working scripts are now broken. Aruk Kumaravel, Windows PowerShell Development Manager, provided a little clarification in a posting at microsoft.public.windows.powershell. The part I still don’t understand is why they would even consider not exposing the methods via get-member…

Folks,
I know that many of  you are wondering about ADSI changes in RC2.  I am currently in the process of  writing a blog to explain  the new ADSI support. People are wondering as to why methods are not showing up in  GM.  .Net DirectoryService Object is wrapper around the underlying AD com object. Based on the  type of AD com object, it can have any number of interfaces like  IADs, IADsContainer, IADsNameSpaces   etc.   .Net DirectoryService doesn’t expose all the functionality of the underlying AD object. That is the reason why  DirectoryEntry object has property called  NativeObject  to access the underlying COM object. The Native COM object doesn’t have all the metadata to determine all the methods that it provides.  Faced with this constraint, we chose a route similar to VBScript.  When we decided to support AD Scripting, we wanted to make it as simple as possible but at the same time expose of the full functionality of  AD. VBSCript provides this functionality with set of following methods alone

Create
Put
Set
PutEx
SetEx
GetInfo
SetInfo

The above list of methods will allow you to do pretty much all ADSI scripting tasks.  We thought of exposing these set of methods as part of Get-Member call but decided against it (In retrospect, maybe we should have exposed these).  Not exposing the methods is what throws people off with the new ADSI support.

I had  written some blog posts on using new ADSI support in the following blogs.  Please take a look at it. I used  ADAM to test these scripts

http://blogs.msdn.com/arulk/archive/2006/07/25/678137.aspx
http://blogs.msdn.com/arulk/archive/2006/07/28/682289.aspx
http://blogs.msdn.com/arulk/archive/2006/08/24/719241.aspx

For Advanced script users, who are still interested in access to the DirectoryEntry object,  it is available as PSBase property in the PSObject. People who are familiar with ADSI scripting with VBScript will find the transition much easier.  If you are used to using DirectoryEntry object then the new changes would be disruptive to existing mental model.

I will  look into some of the examples people have provided in the blog posts and convert few of this into new ADSI syntax and share it  with you.

thanks

Aruk Kumaravel [MSFT]
Windows PowerShell Development Manager
Microsoft Corporation

Advertisements

One response to ““Invisible” methods for ADSI?

  1. Pingback: Modifying Group Memberships with Powershell, Part I « Just Another Sysadmin

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s