Write data to specific place in a XML file

TMJJ

Hi all,

It's the first time that I'm playing with xml files.
I have an xml file which will be used on an embedded system to store machine settings.

I create the following XML file:

<Machines>
 <Machinename Name="Zaaimachine" ID="0">
	<Button Name="0" ID="0">	
		<Function Name=" Clock" ID="0"/>
			<Output Name="1" ID="0"/>
				<State Name="0" ID="0"/>
  		<Function Name=" Output" ID="1"/>
			<Output Name="2" ID="0"/>
				<State Name="1" ID="0"/>
...

can read all the values from the XML file. But now I wish to change some values.

Let's say I want to change the output name from 2 to 3.
I store the data in a array:

JB[0][0] = The function name, in this case: "Output"
JB[0][1] = The output name, in this case: "2"
JB[0][2] = The state name, in this case: "1"

Now I change the value from JB[0][1] to 3:

JB[0][0] = The function name, in this case: "Output"
JB[0][1] = The output name, in this case: "3"
JB[0][2] = The state name, in this case: "1"

Now I need to write some code to save JB[0][1] into the xml file.
Can somebody point me in the good direction?

When I search on the internet I always find you should save the complete xml file into variables and the overwrite the complete file.

Isn't there a better way?

Thanks in advance,
Kind regards,
TMJJ

SGaist

Hi,

QDomDocument comes to mind for that kind of thing. There's no easy way to modify a file "in-place".