Question

我正在解析xml，需要获取子节点的数量。下面是相同的代码片段：

 int getChildCount(const char* parentTag, int parentIndex, 
                                      const char* childTag)
    {
        XMLCh* temp = XMLString::transcode(parentTag);
        DOMNodeList* list = _elementRoot->getElementsByTagName(temp);
        //XMLString::release(&temp);

        //DOMNode* parent = (list->item(parentIndex));
        DOMElement* parent = dynamic_cast<DOMElement*>(list->item(parentIndex));
        DOMNodeList* childList = parent->getElementsByTagName(XMLString::transcode(childTag));
        return (int)childList->getLength();
    }
int main(int argc, char** argv)
{
    string value;


         int length = getChildCount("Bookstore", 0, "Book");
         cout << length;
}

行DOMElement * parent = dynamic_cast（list-＆gt; item（parentIndex））;因父项返回NULL而失败。

我的xml文件如下：

<bookstore>
    <book category="yy">
        <title lang="en">xxx</title>
        <author>hhh</author>
        <year>2005</year>
        <price>30.00</price>
    </book>
    <book category="kk">
        <title lang="en">abcd</title>
        <author>ser</author>
        <year>2005</year>
        <price>29.99</price>
    </book>
</bookstore>

有人可以指出我正在做的错误是什么。感谢。

Answer 1

XML区分大小写 - server { listen 80; server_name letsencrypt.example.com; ... } server { listen 80 default_server; return 301 https://$http_host$request_uri; }与Bookstore不同：

bookstore

xrces项返回NULL

1 个答案: