Question re ADSISearcher and early filtering

[EBrant]

Hello All

Can someone please help me with the following question please.
I want a acheive early filtering using ADSISearcher, please see below

#works
([DirectoryServices.DirectorySearcher]"objectCategory=Computer").findone().psbase.properties

# does not work i.e. returns nothing
([DirectoryServices.DirectorySearcher]"(&(objectCategory=Computer)(dnshostname =W2K3*))").findone().psbase.properties

# returns dnshostname, however this is late filtering
([DirectoryServices.DirectorySearcher]"objectCategory=Computer").findone().psbase.properties | % {$_.dnshostname -match "^W2K3"}

Now I am thinking is this just the way it is? or can I filter on dnshostname and objectCategory before I send down the pipeline, it occurs to me there must be a way?

Thanks all in advance
Ernie

[jvierra]

Perhaps a little simplification would help:

PowerShell Code

Double-click the code block to select all.

#
([adsisearcher]'objectcategory=computer').FindOne().properties
#

'psbase' is not needed.

What is 'early filtering'. Thee is no such thing. Perhaps you are talking about using a WMI filter instead of aPowerShell fiter (where-object).

dnshostname is unique so you do not need anything else.

PowerShell Code

Double-click the code block to select all.

#
([adsisearcher]'dnshostname=W2K3*').FindOne().properties
#

However - 'properti3es' are not what you think they are and require very specual handling as they are all wrapped in collections.

Here is a link to an example of how to use [adsisearcher] and how to unwrap the properties:

http://gallery.technet.microsoft.com/sc ... f-6f59d3b4

[EBrant]

Hello Jim, thanks very much again for your help,

That's right what I meant by early filering is like with WMI i.e. I wanted to get ADSI to reduce the amount of data returned in the first instance before I send down the pipeline to where-object.

Thanks again I will check out the Link

Ernie