boost 遍历XML

 boost 遍历XML 取id值

xml数据格式如下：

<root>
	<nodes>
		<node>
		    <id>001</id>
		    <name>a</name>
		</node>
		<node>
		    <id>001</id>
		    <name>a</name>
		</node>
		<node>
		    <id>001</id>
		    <name>a</name>
		</node>
	</nodes>
</root>

boost遍历程序如下:

std::vector<std::string> usersid;
	{
		std::string alluserid;
		bool ret = this->m_cc->UserGetAll(alluserid);
		std::istringstream xmlusrid_str;
		xmlusrid_str.str(alluserid);
		boost::property_tree::ptree pt;
		boost::property_tree::xml_parser::read_xml(xmlusrid_str, pt, boost::property_tree::xml_parser::trim_whitespace);
		BOOST_AUTO(child, pt.get_child("message.users"));
		for(BOOST_AUTO(pos, child.begin()); pos != child.end(); ++pos)
		{
			BOOST_AUTO(child_paths, pos->second.get_child(""));
			std::cout << pos->second.get<std::string>("id")<< std::endl;
			std::string tmp_id = pos->second.get<std::string>("id");
			usersid.insert(usersid.end(),tmp_id);
		}
	}