为什么在执行appendChild
后,我无法读取下一个节点?
(newChildList->get_item(count,&pNewChild))
appendChild
API无法正常运行。放完这一行之后,我无法获得循环中的下一个get_item()
。它返回pNewChild
NULL
。为什么会这样?
IXMLDOMNode *pNewChild=NULL,*outNewChild;
IXMLDOMNodeList *newChildList=NULL;
BSTR newName;
long len=0;
HRESULT hr=S_OK;
//aggregate attribute
//CHK_HR(aggregateAttribute(pNodeNew,pXMLDomSrc,pXMLDomNew));
//read the list of child
CHK_HR(pNodeNew->get_childNodes(&newChildList));
CHK_HR(newChildList->get_length(&len));
//go over all the children
for(long count=0;count<len;count++)
{
hr =newChildList->get_item(count,&pNewChild);
CHK_HR(pNewChild->get_nodeName(&newName));
USES_CONVERSION;
string temp= W2T(newName);
temp = temp.substr(temp.find_first_of("/:")+1);
if (!temp.compare("tuple"))
{
//CHK_HR(aggregateTuple(pXMLDomSrc,pNewChild));
}
else
{
CHK_HR(pXMLElement->appendChild(pNewChild,&outNewChild));
}
SAFE_RELEASE(pNewChild);
//SysFreeString(newName);
}
CleanUp:
//SAFE_RELEASE(newChildList);
SAFE_RELEASE(pNewChild);
return hr;
答案 0 :(得分:2)
appendChild将节点移动到其他位置,每次将子列表减少一个。
试试这个:
// reverse loop from index base 0 "len-1" to 0
for(long count=len-1;count>=0;--count)
另一方面,您泄漏了大量内存(outNewChild
和newName
)