Hi,

I'm trying to get a list of all "top level" classes from a given namespace, 
e.g. connect to CimV2 then issue:

SELECT * FROM Meta_Class

The problem is that I get nearly 1000 results, I assume it's giving me all 
sub-classes as well. Is there a way to get only the top level classes?

-- 
Gerry Hickman
London (UK)

"Gerry Hickman" wrote:

> Hi,
> 
> I'm trying to get a list of all "top level" classes from a given namespace, 
> e.g. connect to CimV2 then issue:
> 
> SELECT * FROM Meta_Class
> 
> The problem is that I get nearly 1000 results, I assume it's giving me all 
> sub-classes as well. Is there a way to get only the top level classes?
> 
> -- 
> Gerry Hickman
> London (UK) 
> 
> 


"Select * From Meta_Class Where __Superclass Is Null"


-- 
urkec

Hi urkec,

>> SELECT * FROM Meta_Class
>>
>> The problem is that I get nearly 1000 results, I assume it's giving me all 
>> sub-classes as well. Is there a way to get only the top level classes?

> "Select * From Meta_Class Where __Superclass Is Null"

Great, that seems to work!

-- 
Gerry Hickman (London UK)

>> "Select * From Meta_Class Where __Superclass Is Null"
> 
> Great, that seems to work!

But what I really want to do is in code, like this:

var sClass = "Win32_DiskDrive";
var oClassDef = oSvc.Get(sClass);
var cSubClasses = oClassDef.Subclasses_();
showMembers(cSubClasses);

this would show names of Subclasses of Win32_DiskDrive, but I want to 
get top level classes from the Namespace, something like:

var sClass = "";			// start from root
var oClassDef = oSvc.Get(sClass);
var cSubClasses = oClassDef.Subclasses_();
showMembers(cSubClasses);

-- 
Gerry Hickman (London UK)

Hi Gerry,

Thanks for your feedback. 

I am not sure if I have understood you completely. Is your problem 
resolved? If not, can you tell me why urkec's reply does not meet your 
need? Can you help to explain your problem in more details? 

Thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
=========================================
Delighting our customers is our #1 priority. We welcome your comments and 
suggestions about how we can improve the support we provide to you. Please 
feel free to let my manager know what you think of the level of service 
provided. You can send feedback directly to my manager at: 
msdnmg@microsoft.com.

This posting is provided "AS IS" with no warranties, and confers no rights.

Hi Jeffrey,

> I am not sure if I have understood you completely. Is your problem 
> resolved? If not, can you tell me why urkec's reply does not meet your 
> need? Can you help to explain your problem in more details?

Urkec's reply solves the problem in the context of using a query, but I 
want to use the SubClasses() method instead to get only 
top-level-classes from a Namespace, see my previous post for code 
snippets that demonstrate this.

-- 
Gerry Hickman (London UK)

"Gerry Hickman" wrote:

> Hi Jeffrey,
> 
> > I am not sure if I have understood you completely. Is your problem 
> > resolved? If not, can you tell me why urkec's reply does not meet your 
> > need? Can you help to explain your problem in more details?
> 
> Urkec's reply solves the problem in the context of using a query, but I 
> want to use the SubClasses() method instead to get only 
> top-level-classes from a Namespace, see my previous post for code 
> snippets that demonstrate this.
> 
> -- 
> Gerry Hickman (London UK)
> 

Instead of SWbemObject.Subclasses_  you would need to use 
SWbemServices.SubclassesOf with wbemQueryFlagShallow  flag:

var wbemQueryFlagShallow = 1
var cSubClasses = oSvc.SubclassesOf("", wbemQueryFlagShallow)

but you get the same result using SWbemServices.ExecQuery with the query I 
posted:

var cSubClasses1 = oSvc.ExecQuery("Select * From Meta_Class Where 
__Superclass Is Null")



-- 
urkec

Hi Gerry,

Thanks for your feedback. Oh, it seems that urkec has provided the correct 
answer to you. Thank you urkec!

Actually, it's not clear to me why you prefer to not use the meta_class 
query, but you can accomplish the same thing by specifying the Shallow flag:

const wbemQueryFlagShallow = 1

set osvc = getobject("winmgmts:root\cimv2")

for each ocls in osvc.subclassesof("", wbemQueryFlagShallow)
	wscript.echo ocls.path_.class
next

Thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
=========================================
Delighting our customers is our #1 priority. We welcome your comments and 
suggestions about how we can improve the support we provide to you. Please 
feel free to let my manager know what you think of the level of service 
provided. You can send feedback directly to my manager at: 
msdnmg@microsoft.com.

This posting is provided "AS IS" with no warranties, and confers no rights.

Thanks Jeffrey, urkec,

This answers my question.

The reason I wanted to do it by method calls, is so that I could use 
recursion to enum the classes and sub-classes (starting from any point 
in the tree). The WQL query is less suited to this.

Jeffrey Tan[MSFT] wrote:
> Hi Gerry,
> 
> Thanks for your feedback. Oh, it seems that urkec has provided the correct 
> answer to you. Thank you urkec!
> 
> Actually, it's not clear to me why you prefer to not use the meta_class 
> query, but you can accomplish the same thing by specifying the Shallow flag:
> 
> const wbemQueryFlagShallow = 1
> 
> set osvc = getobject("winmgmts:root\cimv2")
> 
> for each ocls in osvc.subclassesof("", wbemQueryFlagShallow)
> 	wscript.echo ocls.path_.class
> next
> 
> Thanks.
> 
> Best regards,
> Jeffrey Tan
> Microsoft Online Community Support
> =========================================
> Delighting our customers is our #1 priority. We welcome your comments and 
> suggestions about how we can improve the support we provide to you. Please 
> feel free to let my manager know what you think of the level of service 
> provided. You can send feedback directly to my manager at: 
> msdnmg@microsoft.com.
> 
> This posting is provided "AS IS" with no warranties, and confers no rights.
> 


-- 
Gerry Hickman (London UK)

Hi Gerry,

Thanks for your confirmation. 

Ok, if you need further help, please feel free to post, thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
=========================================
Delighting our customers is our #1 priority. We welcome your comments and 
suggestions about how we can improve the support we provide to you. Please 
feel free to let my manager know what you think of the level of service 
provided. You can send feedback directly to my manager at: 
msdnmg@microsoft.com.

This posting is provided "AS IS" with no warranties, and confers no rights.