VC++利用微软msxml3.dll创建xml文件

VC6.0下创建xml文件有很多方式，尝试了timyxml，但是他不支持文件声明等的写入，因此转战MSXML

MSXML有很多版本，这里用的是msxml3

首先在头文件中引入

#import "msxml3.dll"
using namespace MSXML2;

其次编写创建xml文件方法

void CCVideoDlg::CreateXML() 
{
    MSXML2::IXMLDOMDocument2Ptr pXMLDom;
    MSXML2::IXMLDOMProcessingInstructionPtr pi;
    HRESULT hr;
    CoInitialize(NULL);
    hr = pXMLDom.CreateInstance(__uuidof(DOMDocument));
    if (FAILED(hr))
    {
        printf("Failed to CreateInstance on an XML DOM");

    }
    pXMLDom->preserveWhiteSpace = VARIANT_TRUE;
//添加声明
    pi = pXMLDom->createProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
    if (pi != NULL) {
        pXMLDom->appendChild(pi);
        pi.Release();
    }
//创建样式表
    pi = pXMLDom->createProcessingInstruction("xml-stylesheet","type='text/xsl' href='./../utils/detail.xsl'");
    if (pi != NULL) {
        pXMLDom->appendChild(pi);
        pi.Release();
    }
    // 创建注释
    MSXML2::IXMLDOMCommentPtr pc;
    pc = pXMLDom->createComment("xmlReport.xml created using XML DOM object.");
    if (pc != NULL) {
        pXMLDom->appendChild(pc);
        pc.Release();
    }

char CurrentDateTime[32];  
getCurrentTime(CurrentDateTime);
// 创建root节点
        MSXML2::IXMLDOMElementPtr pb,pd;
pb= pXMLDom->createElement("body");
pXMLDom->appendChild(pb);

pd = pXMLDom->createElement("Details");
MSXML2::IXMLDOMAttributePtr pa;
    pa = pXMLDom->createAttribute("time");
    if (pa != NULL)
    {
        pa->value = CurrentDateTime;
        pd->setAttributeNode(pa);
    } 
pa = pXMLDom->createAttribute("threshold");
    if (pa != NULL)
    {
CString threadThold;
threadThold.Format("%d",m_sliderCtrl.GetPos());
        pa->value = (_bstr_t)threadThold;
        pd->setAttributeNode(pa);
    } 
pa = pXMLDom->createAttribute("diffPercent");
    if (pa != NULL)
    {
CString diff;
GetDlgItemText(IDC_diffRateEDIT1,diff);
        pa->value =(_bstr_t)diff;
        pd->setAttributeNode(pa);
    } 
pb->appendChild(pd);
pb->appendChild(pXMLDom->createTextNode("\n\t"));
//释放节点
pd.Release();

pb.Release();


    hr = pXMLDom->save((_variant_t)saveXMLReportName);
    if (FAILED(hr))
    {
        printf("Failed to save DOM to xmlReport.xml\n");
    }
    else
    {
        printf("DOM saved to xmlReport.xml\n");
    }
    if (pXMLDom) 
pXMLDom.Release();
    CoUninitialize();
}

void CCVideoDlg::AddXMLNode(CString filePath,CString snapTimes,char currentTime[32],CString cameraId,int countNum,CString state){MSXML2::IXMLDOMDocument2Ptr pDoc;HRESULT hr = pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument30), NULL, CLSCTX_INPROC_SERVER);    if (FAILED(hr))    {        printf("Failed to CreateInstance on an XML DOM");            }pDoc->async = VARIANT_FALSE;pDoc->validateOnParse = VARIANT_FALSE;pDoc->resolveExternals = VARIANT_FALSE;if( pDoc->load((_variant_t)filePath) != VARIANT_TRUE){printf("Fail reason: %s\n", (LPCSTR)pDoc->parseError->Getreason());}else{MSXML2::IXMLDOMNodePtr pNode = pDoc->selectSingleNode(L"body/RESULTS");//首先要找到RESULTS节点，因为是要在它之后插入pNode->appendChild(pDoc->createTextNode("\n\t"));MSXML2::IXMLDOMElementPtr pResultNode=pDoc->createNode(CComVariant(NODE_ELEMENT),"RESULT","");pResultNode->appendChild(pDoc->createTextNode("\n\t"));pNode->appendChild(pResultNode);pNode.Release();pResultNode->setAttribute("snapTimes",(_bstr_t)snapTimes);pResultNode->setAttribute("currentTime",currentTime);pResultNode->setAttribute("TV_Name",(_bstr_t)cameraId);CString strNums;strNums.Format("%d",countNum);pResultNode->setAttribute("diffPercent",(_bstr_t)strNums);pResultNode->setAttribute("state",(_bstr_t)state);//图片路径节点CString imgSrc;imgSrc.Format("%s_%s.jpeg",currentTime,snapTimes);pResultNode->setAttribute("imgSrc",(_bstr_t)imgSrc);pDoc->save((_variant_t)filePath);pResultNode.Release();     }if (pDoc) pDoc.Release();}