VC创建与读取XML文件

1、头文件载入 #import <msxml3.dll>

2、可能出现的问题及解决方法：

#import <msxml3.dll> 导致 LNK1123: 转换到 COFF 期间失败: 文件无效或损坏

3、创建XML文件

void CTestDlg1023Dlg::OnBnClickedBcreatexml()
{
	::CoInitialize(NULL);
	MSXML2::IXMLDOMDocumentPtr pDoc;
	MSXML2::IXMLDOMElementPtr xmlRoot;
	//创建DOMDOCUMENT对象
	HRESULT hr=pDoc.CreateInstance(_uuidof(MSXML2::DOMDocument40));
	if(!SUCCEEDED(hr)) 
	{               
		MessageBox("无法创建DOMDocument对象，请检查是否安装了MS XML Parser 运行库!"); 
		return ;
	} 
	pDoc->raw_createElement((_bstr_t)(char*)"china", &xmlRoot);
	pDoc->raw_appendChild(xmlRoot, NULL);
	MSXML2::IXMLDOMElementPtr  childNode ;         
	pDoc->raw_createElement((_bstr_t)(char*)"City", &childNode);
	childNode->Puttext("WuHan");//节点值
	childNode->setAttribute("population","8,000,000");//属性名,属性值
	childNode->setAttribute("area","10000");
	xmlRoot->appendChild(childNode);
	pDoc->raw_createElement((_bstr_t)(char*)"City", &childNode);
	childNode->Puttext("ShangHai");
	childNode->setAttribute("population","12,000,000");
	childNode->setAttribute("area","12000");
	xmlRoot->appendChild(childNode);
	pDoc->raw_createElement((_bstr_t)(char*)"City", &childNode);
	childNode->Puttext("Hangzhou");
	childNode->setAttribute("population","8,500,000");
	childNode->setAttribute("area","16000");
	xmlRoot->appendChild(childNode);

	pDoc->save("E:\\Test.xml"); 
}

4、读取XML文件

void CTestDlg1023Dlg::OnBnClickedBpharsexml()
{
	MSXML2::IXMLDOMDocumentPtr m_spDoc; 
	HRESULT hr = m_spDoc.CreateInstance(__uuidof(MSXML2::DOMDocument40));
	//char *pPath="E:\\Test.xml";
	//CComBSTR Path = CComBSTR(pPath);
	将XML文件导入内存中的文档对象
	//VARIANT_BOOL success=m_spDoc->load(CComVariant(Path));
	m_spDoc->load("E:\\Test.xml");

	CComPtr<MSXML2::IXMLDOMNode> spNode;
	CComPtr<MSXML2::IXMLDOMNodeList> spChildren;
	//获取文档中的所有一级结点(结点名= RequiredNodeName)
	m_spDoc->documentElement->get_childNodes(&spChildren);
	long NumChildren = 0;
	spChildren->get_length(&NumChildren);

	CComBSTR NodeName;
	int i = 0;
	//spChildren->item[i]->get_nodeName(&NodeName);
	//遍历结点名字
	for (i = 0; i < NumChildren; i++)
	{
		//NodeName.Empty();
		spChildren->item[i]->get_nodeName(&NodeName);
		CString strNodename = (char*)(_bstr_t)NodeName;//City

		VARIANT varVal;
		spChildren->item[i]->get_nodeTypedValue(&varVal);
		CString strCityName = (char*)(_bstr_t)varVal;//WuHan、ShangHai、Hangzhou
		TRACE("【%s】=%s\n",strNodename,strCityName);//在“输出”面板输出

		//获取每个城市的属性名和属性值
		MSXML2::IXMLDOMNamedNodeMapPtr pAttrs = NULL; 
		MSXML2::IXMLDOMNodePtr pAttrItem;
		spChildren->item[i]->get_attributes(&pAttrs);
		long nAttrCount ;
		pAttrs->get_length(&nAttrCount);
		for(int i = 0 ; i < nAttrCount ; i++)
		{     
			pAttrs->get_item(i,&pAttrItem);
			//我们可以通过函数get_nodeName,get_nodeTypedValue得到属性名和属性值，也可以直接得到
			CString strAttrName   = (char*)(_bstr_t)pAttrItem->nodeName;
			CString strAttrValue  = (char*)(_bstr_t)pAttrItem->nodeTypedValue;
			TRACE("Attr[%d]：%s=%s\t",i+1,strAttrName,strAttrValue);//在“输出”面板输出
		}
		TRACE("\n");//在“输出”面板输出

	}

	if (i < NumChildren)
	{
		spNode = spChildren->item[i];
	}
}

demo下载地址：http://download.youkuaiyun.com/detail/brk1985/8073939

参考资料：

1、VC_XML http://blog.youkuaiyun.com/benny5609/article/details/2552504

2、如何用MSXML2操作XML配置文件 http://blog.youkuaiyun.com/wishfly/article/details/1892600