Existance of an item in DCR

iw_store

Hi,

1. Lets take an example item -- Torquerate

If that is part of DCR, I can read value of that using
my $Torquerate = iwpt_dcr_value("dcr.Torquerate");

$Torquerate will have whatever value that item is holding. If nothing $Torquerate will have blank in it.

If the item "dcr.Torquerate" is not part of DCR than also $Torquerate will have blank in it.

Here my question is how can I know whether the item 'Torquerate' is part of DCR or not ? as it returns balnk in both cases, if that has value in it then that returns value.

Any help will be appreciated.

Thanks, Sanjeev

ISCBorisB

Hi, 1. Lets take an example item -- Torquerate If that is part of DCR, I can read value of that using my $Torquerate = iwpt_dcr_value("dcr.Torquerate"); $Torquerate will have whatever value that item is holding. If nothing $Torquerate will have blank in it. If the item "dcr.Torquerate" is not part of DCR than also $Torquerate will have blank in it. Here my question is how can I know whether the item 'Torquerate' is part of DCR or not ? as it returns balnk in both cases, if that has value in it then that returns value. Any help will be appreciated. Thanks, Sanjeev

my $number_of_nodes = iwpt_dcr_list('dcr.Torquerate');
if ($number_of_nodes > 0) {
   # Node(s) exists, populated or otherwise
}
else {
   # No such node
}