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为什么,在做之后appendChild,我无法读取下一个节点?

(newChildList->get_item(count,&pNewChild))

appendChild API 无法正常工作。在我放了这条线之后,我无法获得下一个get_item()循环。它返回pNewChildNULL. 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;
4

1 回答 1

2

appendChild 将节点移动到其他位置,每次将子列表减少一个。

尝试这个 :

// reverse loop from index base 0 "len-1" to 0
for(long count=len-1;count>=0;--count)

附带说明一下,您会泄漏大量内存(outNewChildnewName

于 2014-02-10T17:58:23.090 回答