弱智问题......8要BS我，初学中.....100分！钱还是有DI <-__->

Question

这是在下想要生成的文件：<?xml version="1.0" encoding="gb2312" ?>
<clientinfo>
<servicetype>china</servicetype>
<connection>
<display>HELLO</display>
</connection>
</clientinfo> MSXML2::IXMLDOMDocumentPtr pDoc; 
        MSXML2::IXMLDOMElementPtr  xmlRoot ;
        MSXML2::IXMLDOMElementPtr  xmlRoot2 ;
        MSXML2::IXMLDOMElementPtr  childNode ;  

 HRESULT hr = pDoc.CreateInstance(__uuidof(MSXML2::DOMDocument30));
        
      
  pDoc->raw_createElement((_bstr_t)(char*)"clientinfo", &xmlRoot);
  pDoc->raw_appendChild(xmlRoot, NULL);  pDoc->raw_createElement((_bstr_t)(char*)"servicetype", &childNode);
         childNode->Puttext("china");//节点值
  xmlRoot->appendChild(childNode);pDoc->raw_createElement((_bstr_t)(char*)"servertype", &childNode);
childNode->Puttext("primary");
xmlRoot->appendChild(childNode);         正如你所看到的那样，这些代码只能实现：
<clientinfo>
<servicetype>china</servicetype>
</clientinfo>
我的问题有2个.....
1.如何生成： 
<?xml version="1.0" encoding="gb2312" ?>
这个是用什么方法调用出来的那，请问大家〉。2.如何生成子节点？即：
<clientinfo>
<servicetype>china</servicetype>
<connection>
<display>HELLO</display>
</connection>
</clientinfo>
中的  <connection>
      </connection>
那？
谢谢！

Answer 1

BOOL CChatHistory::Create(LPCTSTR lpszmyLogonName,LPCTSTR lpszLogonName)
{
//Log LogonName="[email protected]" FirstSessionID="1" LastSessionID="165"
CString strLogonName(lpszLogonName);
m_strMyLogonName=lpszmyLogonName;
CString strXMLFile=GetChatHistoryFile(strLogonName);
try{
do{
IXMLDOMDocument2Ptr pDoc;
HRESULT hr = pDoc.CreateInstance(__uuidof(MSXML2::FreeThreadedDOMDocument40));
if(pDoc==NULL) break;
MSXML2::IXMLDOMElementPtr pRoot;
if(pDoc){
pDoc->async = false;
//try load first
do{
if(pDoc->load(T2OLE((LPTSTR)(LPCTSTR)strXMLFile))!=VARIANT_TRUE)break;
pRoot=pDoc->documentElement;
if(pRoot==NULL)break;
if(pRoot->getAttributeNode(L"FirstSessionID")){
m_nFirstSessionID=pRoot->getAttribute(L"FirstSessionID");
}
else{
m_nFirstSessionID=0;
}
if(pRoot->getAttributeNode(L"LastSessionID")){
m_nLastSessionID=pRoot->getAttribute(L"LastSessionID");
}
else{
m_nLastSessionID=0;
}
m_nSessionID=m_nLastSessionID+1;
m_pHistory=pDoc;
m_pRoot=pRoot;
m_strLogonName=strLogonName;
return TRUE;//load successful
}while(FALSE);
//load failed,create it
MSXML2::IXMLDOMProcessingInstructionPtr pProcessingInstruction;
pProcessingInstruction=pDoc->createProcessingInstruction(_T("xml"),
_T("version='1.0'"));
pDoc->appendChild(pProcessingInstruction); pProcessingInstruction=pDoc->createProcessingInstruction(_T("xml-stylesheet"),
_T("type='text/xsl' href='..\\MessageLog.xsl'"));
pDoc->appendChild(pProcessingInstruction); pRoot=pDoc->createElement(_T("Log"));
pRoot->setAttribute(L"FirstSessionID",(long)1);
pDoc->appendChild(pRoot);
pRoot->setAttribute(L"LastSessionID",(long)1);
CreateDirectory(theApp.AppendAppPath(_T("Log")),NULL);
CString strSubDir;
strSubDir.Format(_T("Log\\%s"),m_strMyLogonName);
CreateDirectory(theApp.AppendAppPath(strSubDir),NULL);
pDoc->save(T2OLE((LPTSTR)(LPCTSTR)strXMLFile)); m_nFirstSessionID=1;
m_nLastSessionID=1;
m_nSessionID=1;
m_pHistory=pDoc;
m_pRoot=pRoot;
m_strLogonName=strLogonName;
return TRUE;//load successful
}
}while(FALSE);
}
catch(_com_error &e){
dump_com_error(e);
}
catch(CException*e){
e;
}
catch(HRESULT hr){
hr;
}
catch(...){
}

return FALSE;
}

Answer 2

void ExchangeChildElementText(CXMLExchange* pExchange,LPCTSTR lpszChildElement,CString& rChildElementText)
{

IXMLDOMNodePtr pXMLDomNode=pExchange->m_pXMLDomElement->selectSingleNode(lpszChildElement);
pExchange->m_strCurrent=lpszChildElement;
if(pExchange->m_bLoad){
rChildElementText=(LPCTSTR)pXMLDomNode->text;
}
else{
if(pXMLDomNode==NULL){
pXMLDomNode=pExchange->m_pXMLDoc->createElement(lpszChildElement);
pExchange->m_pXMLDomElement->appendChild(pXMLDomNode);
}
if(pXMLDomNode){
pXMLDomNode->text=(LPCTSTR)rChildElementText;
}
}}

Answer 3

createProcessingInstruction
createElement
appendChild
save

Answer 4

呵呵，老大比较懒得废话，我来帮忙解释，：）createProcessingInstruction用这个可以生成你要的<?xml version="1.0" encoding="gb2312" ?>用createElement来创建节点对象
再用appendChild把创建的节点对像附到你的xml中去
最后用save保存就OK了其实你也挺懒的，老大的代码里什么都有，还把关键的函数找出来你还不满意，呵呵

Answer 5

好好看一下xml SDK中的dynamDOMsmart.cpp
这个例子很全的，可以解决你的问题

Answer 6

这样的回复咋这么多？斑竹的fans真多......