Searching a XML document

Hi, I am using XML 2.6 under C++. I have huge document that I have to search for specific tags. For example
<info>
<profile>
<Name age="20">Rachel<Name/>
<Name age="22">John<Name/>
<profile/>
</info>

when I seach the above document for Name tag, I should be given those two nodes. What function can I use to do this?
Also, what function do I use to get the attribute of these nodes?

Thank you,

Hi

You can use XSL features.
If you are using MSXML, ther is method IXMLDOMNode.selectNodes(XPath)
where XPath is expression like this '//profile/name'.
Indeed your XPath can be very sophisticated.

For a full xpath syntax look through specification.
Good luck

there are 2 ways of searching for a node in a large document
here is my code:

Code:

---

  string l_sSearchPattern;
  string l_sResult;
  IXMLDOMNode* myM3NameNode = NULL;
  HRESULT hr;
  // search for one node containing all tree attributes
  l_sSearchPattern += "//node()[@ComponentID=\""  + 
                      XMLHelperFunctions::longToString(M3MessageRef.getComponentID())  +  "\" and ";
  l_sSearchPattern += "@ElementID=\""            +
                      XMLHelperFunctions::longToString(M3MessageRef.getElementID())    +  "\" and ";
  l_sSearchPattern += "@EventID=\""              + 
                      XMLHelperFunctions::longToString(M3MessageRef.getEventID())      +  "\"]";
  hr = XMLHelperFunctions::searchNodeInDocument(myXMLDoc,l_sSearchPattern,&myM3NameNode);
  if ( hr != S_OK )
  {
    hr = XMLHelperFunctions::searchNodeInDocument(myXMLDoc2,l_sSearchPattern,&myM3NameNode);
    if( hr != S_OK )
    {
      l_sSearchPattern.erase();
      // search for nodes containing componentID with a subnode containing elementID and a subnode
      // containing the specified eventID
      l_sSearchPattern += "//node()[@ComponentID=\""  + 
                          XMLHelperFunctions::longToString(M3MessageRef.getComponentID())  +  "\"]//node()[ ";
      l_sSearchPattern += "@ElementID=\""            +
                          XMLHelperFunctions::longToString(M3MessageRef.getElementID())    +  "\"]//node()[ ";
      l_sSearchPattern += "@EventID=\""              + 
                          XMLHelperFunctions::longToString(M3MessageRef.getEventID())      +  "\"]";
      hr = XMLHelperFunctions::searchNodeInDocument(myXMLDoc,l_sSearchPattern,&myM3NameNode);
      if( hr != S_OK )
      {
        hr = XMLHelperFunctions::searchNodeInDocument(myXMLDoc2,l_sSearchPattern,&myM3NameNode);
        if( hr != S_OK )

---

the helperfunctions:

Code:

---

HRESULT XMLHelperFunctions::searchNodeInDocument( IXMLDOMDocument* pDoc,
                                                  const string &sSearchPattern,
                                                  IXMLDOMNode** pReturnNode )
{
  HRESULT hr = pDoc->selectSingleNode( asciiToBSTR(sSearchPattern.c_str()), pReturnNode );

  return hr;
}

//=================================================================================================

HRESULT XMLHelperFunctions::searchNodeInDocument( IXMLDOMDocument* pDoc,
                                                  const string &sSearchPattern,
                                                  IXMLDOMNodeList** pReturnList )
{
  HRESULT hr = pDoc->selectNodes( asciiToBSTR(sSearchPattern.c_str()), pReturnList);

  return hr;
}
HRESULT XMLHelperFunctions::getNodeAttributeValue( IXMLDOMNode* pNode,
                                                  const string &sAttribute,
                                                  string &sAttributeValue )
{
  VARIANT l_varValue;
  VariantInit( &l_varValue );
  l_varValue.vt = VT_BSTR;

  HRESULT hr = getNodeAttributeValueVariant( pNode, sAttribute, &l_varValue );

  if( S_OK == hr )
  {
    sAttributeValue = BSTRtoString( l_varValue.bstrVal );
    VariantClear( &l_varValue );
  }
  return hr;
}

---

and to get the attribute you want:

Code:

---

    hr = XMLHelperFunctions::getNodeAttributeValue(myM3NameNode,"Name",l_sResult);

---

let me know if this serves your needs!