/// <summary>
/// 获取下级元素
/// </summary>
/// <param name="elementName"></param>
/// <returns></returns>
public static List <HtmlInfo> ChildDescendants(this IEnumerable <HtmlInfo> htmlInfoList, string elementName = null)
{
var html = htmlInfoList.First().InnerHtml;
XHtmlElement xhe = new XHtmlElement(html);
return(xhe.RootDescendants(html).Where(c => elementName == null || c.TagName == elementName).ToList());
}
/// <summary>
/// 获取最近的相同层级的HTML元素
/// </summary>
/// <param name="elementName">等于null为所有元素</param>
/// <returns></returns>
public static List <HtmlInfo> Descendants(this IEnumerable <HtmlInfo> htmlInfoList, string elementName = null)
{
var html = htmlInfoList.First().InnerHtml;
XHtmlElement xhe = new XHtmlElement(html);
return(xhe.Descendants(elementName));
}
/// <summary>
/// 获取父级
/// </summary>
/// <param name="htmlInfoList"></param>
/// <returns></returns>
public static List <HtmlInfo> ParentDescendant(this IEnumerable <HtmlInfo> htmlInfoList, string fullHtml)
{
var saveLeveHtml = htmlInfoList.First().SameLeveHtml;
string replaceGuid = Guid.NewGuid().ToString();
fullHtml = fullHtml.Replace(saveLeveHtml, replaceGuid);
var parentHtml = Regex.Match(fullHtml, @"<[^<]+?>[^<]*?" + replaceGuid + @".*?<\/.+?>").Value;
parentHtml = parentHtml.Replace(replaceGuid, saveLeveHtml);
XHtmlElement xhe = new XHtmlElement(parentHtml);
return(xhe.RootDescendants());
}