C++中使用DOM写XML文档

#import <msxml4.dll>

void Exit()
{
CoUninitialize();
}

int main(int argc, char *argv[])
{
CoInitialize(NULL); // 初始化COM环境
atexit(Exit);

MSXML2::IXMLDOMDocumentPtr pDOMDoc;

pDOMDoc.CreateInstance(__uuidof(MSXML2::DOMDocument40)); // 创建XMLDOMDocument对象

MSXML2::IXMLDOMProcessingInstructionPtr pDOMPI=pDOMDoc->createProcessingInstruction("xml", "version=\"1.0\""); // 创建XML声明

pDOMDoc->appendChild(pDOMPI); // 添加XML声明

MSXML2::IXMLDOMElementPtr pDOMRoot;

       pDOMDoc->raw_createElement((_bstr_t)"China", &pDOMRoot); // 创建[根]节点
       pDOMRoot->setAttribute("Area", "3600000"); // 设置[根]节点属性
       pDOMDoc->appendChild(pDOMRoot); // 向Document中添加根节点

MSXML2::IXMLDOMElementPtr pDOMNode;

       pDOMDoc->raw_createElement((_bstr_t)"City", &pDOMNode);
       pDOMNode->Puttext("Chongqing"); // 为节点赋值
       pDOMRoot->appendChild(pDOMNode); // 向[根]节点中添加子节点

       pDOMDoc->raw_createElement((_bstr_t)"City", &pDOMNode);
       pDOMNode->Puttext("Beijing");
       pDOMRoot->appendChild(pDOMNode);

pDOMDoc->save("Test.xml"); // 储存XML Document

return 0;
}

-----------------------------------------------------------------------------xml存在的基础上，读写xml

CoInitialize(NULL);
    CComPtr<IXMLDOMDocument> spXmldoc;
    HRESULT hr = spXmldoc.CoCreateInstance(L"MSXML2.DOMDocument.6.0");

    if(SUCCEEDED(hr))
    {
        VARIANT_BOOL isSuccessFul;
        CComVariant varXmlFile(L"tlacd.xml");

        //spXmldoc->put_async(VARIANT_FALSE);
        HRESULT hr= spXmldoc->load(varXmlFile, &isSuccessFul);

        if(isSuccessFul==VARIANT_TRUE)
        {
            CComBSTR bstrXml;
            CComPtr<IXMLDOMElement> spRoot=NULL;
            CComPtr<IXMLDOMElement> spTheBook=NULL;
            CComPtr<IXMLDOMElement> spTheElem=NULL;
            CComPtr<IXMLDOMNode> spNewNode=NULL;

            hr = spXmldoc->get_documentElement(&spRoot);
            spRoot->get_xml(&bstrXml);
            AfxMessageBox(L"1, 原始的XML");
            AfxMessageBox(bstrXml);

            spXmldoc->createElement(L"book", &spTheBook);
            spXmldoc->createElement(L"name", &spTheElem);
            spXmldoc->put_text(L"新书");
spTheBook->appendChild(spTheElem, &spNewNode);
            spTheElem.Release();
            spNewNode.Release();

            spXmldoc->createElement(L"price", &spTheElem);
            spTheElem->put_text(L"20");
            spTheBook->appendChild(spTheElem, &spNewNode);
            spTheElem.Release();
            spNewNode.Release();

            spXmldoc->createElement(L"memo", &spTheElem);
            spTheElem->put_text(L"新书的更好看。");
spTheBook->appendChild(spTheElem, &spNewNode);
            spNewNode.Release();
            spTheElem.Release();

            spRoot->appendChild(spTheBook, &spNewNode);
            spNewNode.Release();
            spTheBook.Release();

            spRoot->get_xml(&bstrXml);
            AfxMessageBox(L"2, 新建一本书完成");
AfxMessageBox(bstrXml);
            ////--- 新建一本书完成 ----

////--- 下面对《哈里波特》做一些修改。 ----
////--- 查询找《哈里波特》----
CComPtr<IXMLDOMNode> spTheNode=NULL;
            spRoot->selectSingleNode(L"/books/book[name='哈里波特']", &spTheNode);
            hr=spTheNode.QueryInterface(&spTheBook);
            spTheNode.Release();

            spTheBook->get_xml(&bstrXml);
            AfxMessageBox(L"3,《哈里波特》的XML");
            AfxMessageBox(bstrXml);

            ////--- 此时修改这本书的价格 -----
CComPtr<IXMLDOMNodeList> spNodeList=NULL;
            CComPtr<IXMLDOMNode> spListItem=NULL;
            spTheBook->get_childNodes(&spNodeList);
            spNodeList->get_item(1, &spListItem);
            spNodeList.Release();
            spListItem->put_text(L"15");

            ////--- 另外还想加一个属性id，值为B01 ----
CComVariant varId(L"B01");
            spTheBook->setAttribute(L"id", varId);
            varId.Clear();

            spTheBook->get_xml(&bstrXml);
            spTheBook.Release();
            AfxMessageBox(L"4, 对《哈里波特》修改完成。");
AfxMessageBox(bstrXml);
            ////--- 对《哈里波特》修改完成。 ----

////--- 要用id属性删除《三国演义》这本书 ----
spRoot->selectSingleNode(L"/books/book[@id='B02']", &spTheNode);
            hr=spTheNode.QueryInterface(&spTheBook);
            spTheNode.Release();

            spTheBook->get_xml(&bstrXml);
            AfxMessageBox(L"5, 《三国演义》的XML");
            AfxMessageBox(bstrXml);

            CComPtr<IXMLDOMNode> spParentNode=NULL;
            spTheBook->get_parentNode(&spParentNode);
            spParentNode->removeChild(spTheBook, &spTheNode);
            spTheNode.Release();
            spParentNode.Release();
            spTheBook.Release();

            spRoot->get_xml(&bstrXml);
            AfxMessageBox(L"6, 删除《三国演义》后的XML");
            AfxMessageBox(bstrXml);

            ////--- 再将所有价格低于10的书删除 ----
spRoot->selectNodes(L"/books/book[price<10]", &spNodeList);
            CComQIPtr<IXMLDOMSelection> spSomeBooks=spNodeList;
            spNodeList.Release();

            spSomeBooks->removeAll();
            spSomeBooks.Release();

            spXmldoc->get_xml(&bstrXml);
            AfxMessageBox(L"7, 已经删除价格低于10的书");
AfxMessageBox(bstrXml);

            spRoot.Release();
            bstrXml.Empty();

            //spXmldoc->save(varXmlFile); //保存xml。
}
varXmlFile.ClearToZero();
    }

    spXmldoc.Release();

    CoUninitialize();

posted on 2011-11-23 17:10 On the way 阅读( ...) 评论( ...) 编辑收藏

转载于:https://www.cnblogs.com/areliang/archive/2011/11/23/2260566.html

C++中使用DOM写XML文档

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