MFC如何讀取XML

<?xml version="1.0" encoding="utf-8"?>
<Cases>
  <case>
    <No>001</No>
    <CopyFile src="C:\test.txt" dest="D:\test.txt"></CopyFile>
  </case>
  <case>
    <No>002</No>
    <DelFile>C:\test.txt</DelFile>
  </case>
</Cases>

我們用MFC來讀取上述xml，代碼如下：

void CXXXDlg::ReadXml(CString strXmlPath)
{
    MSXML2::IXMLDOMDocumentPtr pDoc;
    ::CoInitialize(NULL);
    HRESULT hr = pDoc.CreateInstance(__uuidof(MSXML2::DOMDocument40)); 

    if (!SUCCEEDED(hr)) 
    {  
        MessageBox(_T("創建DOMDocument對象失敗。\n請檢查運行環境"), _T("錯誤"), MB_ICONERROR); 
        return;
    }
    // 讀取xml
    pDoc->put_async(VARIANT_FALSE);
    VARIANT_BOOL bhr = pDoc->load((_variant_t)strXmlPath);

    if (bhr != VARIANT_TRUE) {
        MessageBox(_T("無法正確讀取xml文件"), _T("錯誤"), MB_ICONERROR);
        return;
    }
 
    // 根節點取得
    MSXML2::IXMLDOMElementPtr root = pDoc->documentElement;
    // 取得根節點的名字
    _variant_t strRootName = root->nodeName;
    _bstr_t wstrRootName(strRootName.bstrVal);
    MSXML2::IXMLDOMNodeListPtr nodeList = root->GetchildNodes();//cases
    
    // 解析cases的子節點
    ReadCases(nodeList);
}
 
void CXXXDlg::ReadCases(MSXML2::IXMLDOMNodeListPtr nodeList)
{
    int ilength = nodeList->Getlength();
    for (int nodeCount = 0; nodeCount < ilength; nodeCount++) {
        MSXML2::IXMLDOMNodePtr nodePtr = nodeList->nextNode();
        _variant_t strNodeName = nodePtr->GetnodeName();
        _variant_t strNodeValue = nodePtr->GetnodeValue();
 
        // 讀取case節點下的子節點
        ReadCase(nodePtr->GetchildNodes());
    }
}

void CXXXDlg::ReadCase(MSXML2::IXMLDOMNodeListPtr nodeList)
{
    CString strLogInfo;
    strLogInfo.Empty();
    CString strNo;              // case編號
    CString strSrcFile;         // 源文件
    CString strDestFile;        // 目標文件
    for (int nodeCount = 0; nodeCount < nodeList->Getlength(); nodeCount++)
    {
        MSXML2::IXMLDOMNodePtr nodePtr = nodeList->nextNode();
        _variant_t strCaseNodeName = nodePtr->GetnodeName();
        _variant_t strCaseNodeValue = nodePtr->Gettext();
        BSTR bStrTemp = strCaseNodeName.bstrVal;
        CString strTemp = CString(bStrTemp);
        SysFreeString(bStrTemp);
        CString strNodeName = strTemp;
        //  節點的值，如何取得？
        if (0 == strNodeName.CompareNoCase(_T("NO")))
        {
            strNo = (BSTR)strCaseNodeValue.pbstrVal;
            
            // 取得的值可以打印出來
            printf(strNo);
        }
 
        // 節點有屬性值，該怎么處理？
        else if (0 == strNodeName.CompareNoCase(_T("CopyFile")))
        {
            strSrcFile.Empty();
            strDestFile.Empty();
            // 取得節點的屬性值
            MSXML2::IXMLDOMNamedNodeMapPtr pDOMAttrList= nodePtr->Getattributes();
            for (int j = 0; j < pDOMAttrList->Getlength(); j++)
            {
                MSXML2::IXMLDOMNodePtr pDOMAttr= pDOMAttrList->Getitem(j); 
                // 取得源文件路徑
                if (CompareNoCase((char*)pDOMAttr->GetnodeName(), _T("src")))
                {
                    strSrcFile = pDOMAttr->GetnodeTypedValue();
                    // 取得目標文件路徑
                } else if (CompareNoCase((char*)pDOMAttr->GetnodeName(), _T("dest")))
                {
                    strDestFile =pDOMAttr->GetnodeTypedValue();
                }
                
                printf("strSrcFile = %s\n", strSrcFile);
                printf("strDestFile = %s\n", strDestFile );
            }
            else if (0 == strNodeName.CompareNoCase(_T("DelFile")))
            {
                strDestFile.Empty();
                strDestFile = CString((BSTR)strCaseNodeValue.pbstrVal);
                
                printf("strDestFile = %s\n", strDestFile );
            } 
        }
    }    

為了能夠讓MFC認識MSXML2，我們需要引入相應的dll，代碼如下;
#import "msxml4.dll"