MSXML解析XML的一个例子

系统管理员 2022-05-25 03:11 184阅读 0赞

xml例子如下：

<?xml version="1.0"?>
    <catalog>
      <book id="bk001">
        <author>Eddy</author>
        <title>XML Developer's Guide</title>
        <price>16.18</price>
      </book>
      <book id="bk002">
        <author>Rain</author>
        <title>Midnight Rain</title>
        <price>12.95</price>
      </book>
      <book id="bk003">
        <author>Sunny</author>
        <title>Maeve Ascendant</title>
        <price>60</price>
      </book>
    </catalog>

工程首先加入msxml.tlh和msxml.tli。

然后：

#include "msxml.tlh"

新建了一个MFC简单对话框工程，代码如下：

void CtestXMLDlg::OnBnClickedOk()
    {
    	//首先初始化COM   
    	HRESULT hr;  
    	hr = CoInitialize(NULL);   
    	if( hr != S_OK )  
    	{  
    		return;  
    	}  
    	//创建Document对象   
    	MSXML::IXMLDOMDocumentPtr pDoc;  
    	hr = pDoc.CreateInstance(__uuidof(MSXML::DOMDocument)); 
    	if( FAILED(hr) )  
    	{  
    		return;  
    	}  
    	if( FALSE == pDoc->load(_bstr_t("D:\\Book.xml")) )  
    	{
    		return; 
    	}		 	
    	//选择内容的根节点   
    	MSXML::IXMLDOMElementPtr pElem = NULL;  
    	pElem = pDoc->selectSingleNode("catalog");  
    	if(pElem==NULL)  
    	{
    		return;
    	}
    	unsigned int nBookNum = pElem->childNodes->length;  
    	if( nBookNum == 0)  
    	{
    		return;
    	}
    
    	for(int i=0; i < nBookNum; i++)  
    	{  
    		MSXML::IXMLDOMNodePtr pBookNode = pElem->childNodes->item[i];  
    		if(pBookNode==NULL)  
    		{
    			return;
    		}
    		//读取book节点的id属性   
    		MSXML::IXMLDOMNodePtr pId = pBookNode->attributes->getNamedItem("id");
    		//读取book节点下author子节点   
    		MSXML::IXMLDOMNodePtr pAuthorNode = pBookNode->selectSingleNode("author");  
    		if(pAuthorNode==NULL)  
    		{  
    			;
    		}  
    		else  
    		{  
    			; 
    		}   
    	}  	
    }