vb.net - How to programatically add nodes at certain locations in xml config file -


we have our software installed on 50 client pcs.

the software picks values xml config file. each client has own personal node values (true/false) in config file.

now releasing new version of software few more nodes in xml config file.

how add new nodes clients existing config files while retaining node values (true/false).

note we have provide script client cannot manually!

sample xml: 

  <?xml version="1.0" encoding="utf-8"?> <applicationsettings xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:xsd="http://www.w3.org/2001/xmlschema">   <dbengine>true</dbengine>    <enableauditlogging>true</enableauditlogging>    <schema>     <fileno>05</fileno>   </schema>    <nodetobeadded1>    <xml/>    <xml/>   </nodetobeadded1>   <nodetobeadded2>    <defaultpath="c:\"/>   </nodetobeadded2>   <exportto>     <exportto>       <id>0</id>        <path>c:\</path>     </exportto>   </exportto> </applicationsettings>

here's basic code can start with.

imports system.xml  public class form1     private sub test()         dim xdoc xmldocument         dim root xmlnode         dim n xmlnode          xdoc = new xmldocument()         xdoc.load("f:\tmp\a.xml")         root = xdoc.selectsinglenode("/applicationsettings")         if xdoc.selectsinglenode("/applicationsettings/nodetobeadded1") _             nothing             n = root.insertafter(                 xdoc.createnode(xmlnodetype.element, "nodetobeadded1", ""),                 xdoc.selectsinglenode("/applicationsettings/schema"))             n.appendchild(                 xdoc.createnode(xmlnodetype.element, "xmlsubsomething", ""))         end if         xdoc.save("f:\tmp\b.xml")     end sub end class

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