RE: Parsing XML using DOM in VC++

[Jesse Pelton]

First, you need to provide some specifics as to what you're doing and
what's not working as expected.  A small, well-organized code sample is
one way to provide that.

Second, SAX may be a better (more natural and more efficient) solution
to your problem than DOM.  If you're just traversing the DOM in order to
build your own in-memory representation, you could avoid the CPU and
memory overhead of building a DOM by creating your objects in response
to SAX events.

And finally, you might want to look at CodeSynthesis XSD, "an
open-source, cross-platform W3C XML Schema to C++ data binding compiler"
based on Xerces (http://www.codesynthesis.com/products/xsd/) and similar
products.

-----Original Message-----
From: Amit [mailto:amitpard...@yahoo.com] 
Sent: Thursday, January 22, 2009 6:28 AM
To: c-users@xerces.apache.org
Cc: Amitsingh Pardesi
Subject: Parsing XML using DOM in VC++

Hi,

I am using Visual Studio 2008 to develop a Windows Console Application. 

I need to parse the XML Buffer and create Class objects from each
Element node and again re-create the XML from these objects. I am using
Xerces 2.8 on Windows platform. I am able to do the same for a simple
XML file like the one below: 

<?xml version="1.0" encoding="utf-8" ?>
<RootInfo>
  <Node>
    <NodeID>81023492-ACA3-98Af-BF38-7242AQ87088X</NodeID>
    <NodeIP>192.168.0.222</NodeIP>
    <NodeUserName>abcd</NodeUserName>
    <NodePassword>aabbccdd</NodePassword>
    <NodeType>Source</NodeType>
  </Node>
  <Node>
    <NodeID>4S123492-ACG0-98Af-BF38-K900F787IJ5M</NodeID>
    <NodeIP>192.170.7.21</NodeIP>
    <NodeUserName>Amit</NodeUserName>
    <NodePassword>amitpass</NodePassword>
    <NodeType>GUI</NodeType>
  </Node>
</RootInfo>

But when it comes to a more complex XML file like the one mentioned
below, 

<?xml version="1.0" standalone="yes"?>
<RootInfo>
    <Request>
        <Command>
            <CommandID>5f27-4e40-b6da-b1cb</CommandID>
            <ObjectName>File</ObjectName>
            <OperationName>Add</OperationName>
            <CommandType>Sync</CommandType>
        </Command>
        <Data>
           <DataElem1>
             <Text1>ABC</Text1>
             <Text2>ASDH</Text2>
           </DataElem1>
           <DataElem2>
             <File1>asdas.bat</File1>
             <file2>askjd.doc</file2>
           </DataElem2>
           <Status>
             <state>append</state>
             <state>add</state>
           </Status>
         </Data>
         <Error>
            <ErrorID/>
            <ErrorMessage/>
          </Error>
     </Request>
    <Response>
    <Command>
      <CommandID>5f27-4e40-b6da-b1cb</CommandID>
    </Command>
    <Data>
      <DataElem2>
        <File1>asdas.bat</File1>
        <file2>askjd.doc</file2>
      </DataElem2>
      <Status>
        <state>appended</state>
        <state>added</state>
      </Status>
    </Data>
      <Error>
      <ErrorID>62342-s838s-34jf3-eir8e</ErrorID>
      <ErrorMessage>Command Success</ErrorMessage>
      </Error>
    </Response>
</RootInfo>

I am not able to parse it correctly using DOM. Each node has a
corresponding Class to store the details. The class of RootInfo will
have two members, by the name Request & Response beloging to Class
ReqRes. They both will in turn have 3 members by the name Command, Data
& Error of respective class and so on. 

How do I do this? Any pointer to resolve this will be appreciated. 

Regards,
Amit