Question

I have the following XML structure so that I can add my configuration details to lastconnected element:

<?xml version="1.0" encoding="utf-8" ?>
<lastconnectedServers>
</lastconnectedServers >

Now I want to do some XML operation like adding elements and attributes.For Example I want to add the elements to xml above:(Inside elemet lastconnectedServers):

<Server ip="" domain="">
        <SharedFolder name="" type=""/>
        <SharedFolder name="" type =""/>
        <SharedFolder name="" type =""/>
</Server> 

so that the resulting XML will look something like below:

<?xml version="1.0" encoding="utf-8" ?>
<lastconnectedServers>
   <Server ip="" domain="">
        <SharedFolder name="" type=""/>
        <SharedFolder name="" type =""/>
        <SharedFolder name="" type =""/>
   </Server>
</lastconnectedServers >

Answer 1

Here is the sample code using MSXML. COM error checking is omitted. for The code looks a little bit wordy because of ATL helpers for COM usage, but the programming model follows W3C DOM APIs which is quite well accepted by xml developers.

CComPtr<IXMLDOMDocument2> spDoc;
CComPtr<IXMLDOMElement> spServerElement, spSharedFolderElement;
CComPtr<IXMLDOMNode> spServerNode, spLastConnectedServerNode;
IXMLDOMNode* pInsertedNode;
VARIANT_BOOL varSucc;
CComBSTR bstrLastConnected = L"<?xml version=\"1.0\" encoding=\"utf-8\" ?> \
                               <lastconnectedServers> \
                               </lastconnectedServers >";

spDoc.CoCreateInstance(CLSID_DOMDocument60, NULL, CLSCTX_INPROC_SERVER);
spDoc->put_async(VARIANT_FALSE);
spDoc->loadXML(bstrLastConnected, &varSucc);

// Finds the lastConnectedServerNode node with XPath.
spDoc->selectSingleNode(CComBSTR(L"/lastconnectedServers"),
    &spLastConnectedServerNode);

// Creates and appends Server node.
spDoc->createElement(CComBSTR(L"Server"), &spServerElement);
spServerElement->setAttribute(CComBSTR(L"ip"), CComVariant(L""));
spServerElement->setAttribute(CComBSTR(L"domain"), CComVariant(L""));
spLastConnectedServerNode->appendChild(spServerElement, &pInsertedNode);

// Creates and appends the first SharedFolder elements.
spDoc->createElement(CComBSTR(L"SharedFolder"), &spSharedFolderElement);
spSharedFolderElement->setAttribute(CComBSTR(L"name"), CComVariant(L""));
spSharedFolderElement->setAttribute(CComBSTR(L"type"), CComVariant(L""));
spServerElement->appendChild(spSharedFolderElement, &pInsertedNode);

// Creates the second and third SharedFolder elements...

// Gets the xml content.
CComBSTR bstrXml;
spDoc->get_xml(&bstrXml);

wprintf(L"%s", (LPCWSTR) bstrXml);

Hope this helps.