VC++利用微软msxml3.dll创建xml文件

最新推荐文章于 2024-12-30 10:42:20 发布

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本文详细介绍了在VC6.0环境下利用MSXML库创建XML文件的方法，包括添加XML声明、样式表、注释以及创建根节点等步骤，并提供了将XML文档保存至指定文件的实现细节。

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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();
}