/*********** The header file ******************************/
class CXMLConfig
{
private:
IXMLDOMDocument* m_pXMLDocument;
CString m_strFileName;
public:
CXMLConfig(void);
~CXMLConfig(void);
CXMLConfig(CString strConfigFileName);
HRESULT LoadXMLDocument();
CString GetValue(CString strXPath);
void SetFileName(CString strFileName);
};
/*********** The implementation file ******************************/
#include "stdafx.h"
#include ".\xmlconfig.h"
CXMLConfig::CXMLConfig(void)
{
CoInitialize(NULL);
m_pXMLDocument = NULL;
m_strFileName = "";
}
CXMLConfig::~CXMLConfig(void)
{
if (m_pXMLDocument!=NULL) {
m_pXMLDocument->Release();
m_pXMLDocument = NULL;
}
CoUninitialize();
}
CXMLConfig::CXMLConfig(CString strConfigFileName)
{
m_strFileName = strConfigFileName;
}
void CXMLConfig::SetFileName(CString strFileName)
{
m_strFileName = strFileName;
}
BOOL CXMLConfig::LoadXMLDocument(BOOL bValidateOnParse , BOOL bResolveExternals )
{
HRESULT hRes ;
BOOL bRet = FALSE;
CFileFind ff;
if (!ff.FindFile(m_strFileName)) {
CString strMsg;
strMsg.Format("The file '%d' is not found",m_strFileName);
AfxMessageBox(strMsg);
return bRet;
}
hRes = CoCreateInstance(CLSID_DOMDocument, NULL, CLSCTX_INPROC_SERVER,IID_IXMLDOMDocument, (void**)&m_pXMLDocument);
if ( hRes == S_OK ) {
COleVariant var(m_strFileName) ;
VARIANT_BOOL bResult;
hRes = m_pXMLDocument->load(var,&bResult) ;
if ( hRes == S_OK && bResult == VARIANT_TRUE ) {
//	Success
bRet = TRUE;
}
else {
AfxMessageBox("file can not be loaded");
}
}
return bRet ;
}
/********************************************************************************
Function	:	GetValue
Parameters	:
strXPath	:	xPath to query from the xml file
*********************************************************************************/
CString CXMLConfig::GetValue(CString strXPath)
{
CString strValue = "";
CComPtr<IXMLDOMElement> pRoot;
CComPtr<IXMLDOMNode> pXMLDOMNodeResult;
CComPtr<IXMLDOMElement> pElement;
CComPtr<IXMLDOMText> pText;
CComPtr<IXMLDOMNode> pXMLDOMNode;
BSTR bStrXPath;
m_pXMLDocument->get_documentElement(&pRoot);
if ( pRoot == NULL ) {
return strValue;
}
bStrXPath = strXPath.AllocSysString() ;
pRoot->selectSingleNode(bStrXPath,&pXMLDOMNodeResult);
::SysFreeString(bStrXPath) ;
if ( pXMLDOMNodeResult == NULL ) {
return strValue;
}
pXMLDOMNodeResult->QueryInterface(IID_IXMLDOMElement,(void**)&pElement);
if ( pElement == NULL ) {
return strValue;
}
pElement->get_firstChild(&pXMLDOMNode);
if ( pXMLDOMNode == NULL ) {
return strValue;
}
pXMLDOMNode->QueryInterface(IID_IXMLDOMText,(void**)&pText);
if ( pText == NULL ) {
return strValue;
}
BSTR bStrTextContent ;
pText->get_text(&bStrTextContent) ;
strValue = CString(bStrTextContent) ;
return strValue;
}