Removing specific node in XML .

[riarioriu3]

I have created XML file using QXmlStreamWriter .

How can i delete one MaterialDetails node based on some key value (here it is descrip)

<?xml version="1.0" standalone="yes"?>
  <MaterialDetails Descrip="Material-1">
   <Ref> 70 </Ref>
   <Min> 70 </Min>
   <Max> 70 </Max>
   <ColdTrans> 70 </ColdTrans>
   <HotTrans> 70 </HotTrans>
   <ParameterVal> 11 5 1.03e+07</ParameterVal>
  </MaterialDetails>
 
  <MaterialDetails Descrip="Material-2">
   <Ref> 70 </Ref>
   <Min> 70 </Min>
   <Max> 70 </Max>
   <ColdTrans> 70 </ColdTrans>
   <HotTrans> 70 </HotTrans>
   <ParameterVal> 11 5 1.05e+07 </ParameterVal>
  </MaterialDetails>

<?xml version="1.0" standalone="yes"?>
  <MaterialDetails Descrip="Material-1">
   <Ref> 70 </Ref>
   <Min> 70 </Min>
   <Max> 70 </Max>
   <ColdTrans> 70 </ColdTrans>
   <HotTrans> 70 </HotTrans>
   <ParameterVal> 11 5 1.03e+07</ParameterVal>
  </MaterialDetails>

  <MaterialDetails Descrip="Material-2">
   <Ref> 70 </Ref>
   <Min> 70 </Min>
   <Max> 70 </Max>
   <ColdTrans> 70 </ColdTrans>
   <HotTrans> 70 </HotTrans>
   <ParameterVal> 11 5 1.05e+07 </ParameterVal>
  </MaterialDetails>

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[wysota]

Skip that node when writing the xml stream with QXmlStreamWriter.

[riarioriu3]

Thanks wyosta for giving reply . you helped me a lot in my prev posts ..
I have given Desc attribute which can be used as a id . Instead of writing everything again , is there any concept like it will search the tag based on desc attribute , if it finds its value as Material-2 then it will delete the MaterialDetails node .

[wysota]

You can use QDomDocument to load the whole xml tree into memory and then use QDomNode::removeChild() to remove a node. Just remember to write the resulting tree to a file again and possibly truncate the file.