C#中用XmlDocument对象获取XML文件中的节点值

 xml文件:
<?xml version="1.0" encoding="utf-8" ?>
<bookstore>
  <book>
    <title lang="eng">Harry Potter</title>
    <price>29.99</price>
  </book>
  <book>
    <title lang="eng">Learning XML</title>
    <price>39.98</price>
  </book>
  <bookstore>
    <title lang="eng">Learning C#</title>
    <price>55.23</price>
  </bookstore>
  <item name="1">第一个item</item>
  <item name="2">
    <item name="1">这个结点(1)</item>
    <item name="2">这个结点(2)</item>
    <book>
      <title lang="cn">Learning C</title>
      <price>60.95</price>
    </book>
  </item>
</bookstore>
           XmlDocument xdoc = new XmlDocument();
            xdoc.Load(Server.MapPath("books.xml"));
            XmlNodeList xnl = xdoc.SelectNodes("/bookstore/book");
            string nodeTempStr = "";
            foreach (XmlNode node in xnl)
            {
                nodeTempStr = node.InnerText;
                node