Removing a Single Item from a WMI Collection

One of the main purposes of accessing a collection is to remove an item from the collection. You can remove an item from a collection with a call to the SWbemPropertySet.Remove method. This method is not available for SWbemObjectSet or SWbemMethodSet.

Items are removed by name from SWbemPropertySet, SWbemQualifierSet, and SWbemNamedValueSet. However, items in SWbemRefresher are removed by index and from SWbemPrivilegeSet by the constant that represents the privilege name.

To remove an item from a collection

• The following code example shows how to remove the item with a call to the SWbemPropertySet.Remove method.

  oclass.Properties_.Remove "Prop2"
  

  The following example creates a new class named "NewClass" in the root\default namespace and adds three properties to it. The script then uses the code from the previous example to delete the second property.

  ' Obtain an empty class and name it
  Const WBEM_CIMTYPE_STRING = 8
  Set objSWbemService = GetObject("winmgmts:root\default")
  Set objClass = objSWbemService.get()
  Wscript.Echo "Creating class NewClass"
  objClass.Path_.Class = "NewClass"
  
  ' Add three properties 
  For i = 1 to 3
      objClass.Properties_.Add "Prop" & i, WBEM_CIMTYPE_STRING
  Next
  Getprops()
  
  ' Remove the Prop2 property
  objClass.Properties_.Remove "Prop2"
  Wscript.Echo "Second property removed "
  Getprops()
  
  ' Write the changes to the class back
  objClass.Put_
  
  Sub Getprops()
      Wscript.Echo "Number of Properties = " _
          & objClass.Properties_.Count
      For Each prop in objClass.Properties_
          Wscript.Echo prop.name
      Next
  End Sub
  

For more information, see Manipulating Class and Instance Information, Accessing a Collection, and Removing Multiple Items from a Collection.