如何解析多个特定节点的xml [英] how to parse xml for multiple specific node

问题描述

嘿，在我的下面的代码中，它只检查1个节点是否存在该节点。同样，我想在同一个xml中检查多个特定节点的相同内容。我怎么做。



reboot.xml

 <   rebootexclusiondata  >  
 <   memid  >  123 <   / memid  >  
 <   siteid  >  123 <   / siteid  >  
 <   regid  >  12345 <   / regid  >  
 <  由创建>  tanvi <   / createdby  >  
 <  已更新 >  null <   / updatedby  >  
 <  排除 >  true <   / exclusion  >  
 <   dcdtime  >  2015-08-25 10:12:13 <   / dcdtime  >  
 <   updcdtime  < span class =code-keyword>>  2015-08-25 10:12:13 <   / updcdtime  >  
 <   / rebootexclusiondata  >  

xmlparse.cpp：

 void queryNodes（）
 {
 HRESULT hr = S_OK; 
 IXMLDOMDocument * pXMLDom = NULL; 
 IXMLDOMNodeList * pNodes = NULL; 
 IXMLDOMNode * pNode = NULL; 
 IXMLDOMNode * pNode1 = NULL; 
 BSTR bstrQuery1 = NULL; 
 BSTR bstrQuery2 = NULL; 
 BSTR bstrNodeName = NULL; 
 BSTR bstrNodeValue = NULL; 
 VARIANT_BOOL varStatus; 
 VARIANT varFileName; 
 VariantInit（& varFileName）; 
 //< siteid> 123< / siteid> 
 CHK_HR（CreateAndInitDOM（& pXMLDom））; 
 CHK_HR（VariantFromString（Lstocks.xml，varFileName））; 
 CHK_HR（pXMLDom-> load（varFileName，& varStatus））; 
 if（varStatus！= VARIANT_TRUE）
 {
 CHK_HR（ReportParseError（pXMLDom，无法从stocks.xml加载DOM。））; 
} 
 //查询单个节点。 
 // bstrQuery1 = SysAllocString（L// rebootexclusiondata [2] / *）; 
 bstrQuery1 = SysAllocString（L// rebootexclusiondata // exclusion //）; 
 
 CHK_ALLOC（bstrQuery1）; 
 CHK_HR（pXMLDom-> selectSingleNode（bstrQuery1，& pNode））; 
 if（pNode）
 {
 printf（selectSingleNode的结果：\ n）; 
 CHK_HR（pNode-> get_nodeName（& bstrNodeName））; 
 CHK_HR（pNode-> get_xml（& bstrNodeValue））; 
 SysFreeString（bstrNodeName）; 
 printf（Node，<％S>：\ n，bstrNodeName）; 
 printf（\ t％S \ n％S \ n，bstrNodeValue）; 
 if（0 == wcscmp（bstrNodeValue，L< exclusion> true< / exclusion>））
 {
 printf（\ n exe exit \\\
 \ n ）; 
} 
其他
 {
 printf（\ n更进一步！让我们重启系统\ n \\ n）; 
} 
 SysFreeString（bstrNodeValue）; 
 SAFE_RELEASE（pNode）; 
} 

现在在此代码中检查是否

< siteid> 123< / siteid> 

与

 <  排除 >  true <  < span class =code-leadattribute> / exclusion  >  

或不是

解决方案

如果你最好阅读文档，你会发现函数IXMLDOMNode::get_nextSibling 。



就在那里。通常，接口和类提供API，其中包含所有标准任务。这是一个高品质的功能。 ; - ）

hey guys in my below code it checks for only 1 node whether that node is present or not. similarly i want to check the same for multiple specific node in same xml. so how do i do it.

reboot.xml

<rebootexclusiondata>
<memid>123</memid>
<siteid>123</siteid>
<regid>12345</regid>
<createdby>tanvi</createdby>
<updatedby>null</updatedby>
<exclusion>true</exclusion>
<dcdtime>2015-08-25 10:12:13</dcdtime>
<updcdtime>2015-08-25 10:12:13</updcdtime>
</rebootexclusiondata>

xmlparse.cpp:

void queryNodes()
{
	HRESULT hr = S_OK;
	IXMLDOMDocument *pXMLDom = NULL;
	IXMLDOMNodeList *pNodes = NULL;
	IXMLDOMNode *pNode = NULL;
	IXMLDOMNode *pNode1 = NULL;
	BSTR bstrQuery1 = NULL;
	BSTR bstrQuery2 = NULL;
	BSTR bstrNodeName = NULL;
	BSTR bstrNodeValue = NULL;
	VARIANT_BOOL varStatus;
	VARIANT varFileName;
	VariantInit(&varFileName);
	//<siteid>123</siteid>
	CHK_HR(CreateAndInitDOM(&pXMLDom));
	CHK_HR(VariantFromString(L"stocks.xml", varFileName));
	CHK_HR(pXMLDom->load(varFileName, &varStatus));
	if (varStatus != VARIANT_TRUE)
	{
		CHK_HR(ReportParseError(pXMLDom, "Failed to load DOM from stocks.xml."));
	}
	// Query a single node.
	//bstrQuery1 = SysAllocString(L"//rebootexclusiondata[2]/*");
	bstrQuery1 = SysAllocString(L"//rebootexclusiondata//exclusion//");
	
	CHK_ALLOC(bstrQuery1);
	CHK_HR(pXMLDom->selectSingleNode(bstrQuery1, &pNode));
	if (pNode)
	{
		printf("Result from selectSingleNode:\n");
		CHK_HR(pNode->get_nodeName(&bstrNodeName));
		CHK_HR(pNode->get_xml(&bstrNodeValue));
		SysFreeString(bstrNodeName);
		printf("Node, <%S>:\n", bstrNodeName);
		printf("\t%S\n%S\n", bstrNodeValue);
		if (0 == wcscmp(bstrNodeValue, L"<exclusion>true</exclusion>"))
		{
			printf("\n exe exit \n\n");
		}
		else
		{
			printf("\n go further! lets reboot the system\n\n");
		}
		SysFreeString(bstrNodeValue);
		SAFE_RELEASE(pNode);
	}

now in this code it checks whether

<siteid>123</siteid>

is present along with

<exclusion>true</exclusion>

or not

解决方案

If you had better read the documentation you would had found the function IXMLDOMNode::get_nextSibling.

It's all there. Normally interfaces and classes provide an API in which all standard tasks are included. It is a quality feature. ;-)

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