public static void Main()
{
//<catalog>
// <cd country="USA">
// <title>Empire Burlesque</title>
// <artist>Bob Dylan</artist>
// <price>10.90</price>
// </cd>
// <cd country="UK">
// <title>James Bond</title>
// <artist>Hello World</artist>
// <price>123456</price>
// </cd>
//</catalog>
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.Load("xml.xml");
var node = doc.DocumentNode.SelectSingleNode("/catalog/cd/@country"); // TODO : 选择的是cd元素而不是country属性
Console.WriteLine(node.GetType());
Console.WriteLine(node);
HtmlAgilityPack.HtmlNodeNavigator docx = new HtmlAgilityPack.HtmlNodeNavigator("xml.xml");
var nodex = docx.SelectSingleNode("/catalog/cd/@country"); // TODO 不能使用SelectNodes
var ss = nodex.SelectSingleNode("//price");
Debug.WriteLine(ss?.Value ?? "null");
nodex.MoveToRoot();
var ss2 = nodex.SelectSingleNode("//price");
Debug.WriteLine(ss2?.Value ?? "null");
nodex.MoveToFirstChild();
Console.WriteLine(nodex.GetType());
Console.WriteLine(nodex.Value); // 这个解决了属性选择的问题
var r = docx.Select("/catalog/cd/@country").Cast <HtmlNodeNavigator>();
// http://stackoverflow.com/questions/26744559/htmlagilitypack-xpath-and-regex TODO 关于 SelectNodes 的解决方案
var nodes = docx.SelectSet("/catalog/cd/@country");
//XmlDocument doc = new XmlDocument();
//doc.Load("xml.xml");
//var r = doc.DocumentElement.SelectSingleNode("//@country"); // !! XmlDocodument就支持
}
/// <summary>
/// 根据 xpath 选择 node, 并将当前 node 转化为 root node
/// </summary>
/// <remarks>Hesinx 2016-05-26</remarks>
/// <param name="navigator"></param>
/// <param name="xpath"></param>
/// <returns></returns>
public static IEnumerable <HtmlNodeNavigator> SelectSetAsRoot(this HtmlNodeNavigator navigator, string xpath)
{
return(navigator.SelectSet(xpath).Select(m => m.ToRoot()));
}
