I need to change the value of one node/key if another node/key has a particular value. For instance if the Name node = L1 in a channel element, change the value of the voltage node in that same channel element. I have to set the voltage in each channel according to the name value. I don't really care what the original voltage value is and would prefer to ignore it.

<Settings>
<Channels>
<Channel Name="R1" Voltage="100" Test="1"/>
<Channel Name="R2" Voltage="200" Test="0"/>
...
<Channel Name="L1" Voltage="400" Test="0"/>
<Channel Name="L360" Voltage="120" Test="1"/>
</Channels>
</Settings>

[download]

So I would expect the code to work something like this...

if($root->findnodes('/Settings/Channels/Channel/Name="L1"')){  #<-Chan
+nel name = "L1"
 my ($L1value) = $root->findnodes('/Settings/Channels/Channel/Name="L1
+" @Voltage[.="400"]');
    $L1value->setValue(300);
}

[download]

but that doesnt work. I cant figure out how to change the voltage based on the value of Name.

Thanks Monks C

In reply to how to change node value based on other node value by ccherri

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