Condividi tramite

Writing WMI providers FAQ series - 2 - When a provider doesn’t support enumeration what will be the impact for the WMI consumer?

  • Articolo

The aim of the series is to cover a WMI Provider writing question per post. If you have a question, you'd like the WMI team to answer, do leave a comment.

Now, for the answer -  

If the WMI client requests to enumerate all instances of a class supported by such a provider, a return code WBEM_NOT_CAPABLE will be returned.

If the WMI client performs a query on a class supported by that provider and if that provider doesn’t have the query capability, then the query will fail because WMI uses the enumeration technique with post-filtering to provide the query results. However, if the query capability is supported by the provider, then the query will succeed because WMI will pass that query to the provider and the provider will handle it accordingly.

Kapil Mathur [MSFT]

Comments

  • Anonymous
    October 10, 2009
    This does not, repeat NOT, work on vista 64 bit

  • Anonymous
    October 14, 2009
    Could you give us some more details of your experience? Did you implement query capability in your provider which did not work?

  • Anonymous
    December 15, 2010
    Could you please write a post on how to create a new WMI class and specify that class with variables?