Removing XML node(删除 XML 节点)
问题描述
我还有另一项无法完成的任务:我应该从 此站点,删除所有名称中没有VIDEO"的节点,然后将其保存到另一个 XML 文件中.我在阅读和写作方面没有问题,但是删除让我有些困难.我试图做节点 -> 父节点 -> 子节点工作,但它似乎没有用:
I have got yet another task I am not able to accomplish: I am supposed to parse the XML from this site, remove all the nodes that don't have "VIDEO" in their name and then save it to another XML file. I have no problems with reading and writing, but removing makes me some difficulties. I have tried to do the Node -> Parent Node -> Child Node work-aroud, but it did not seem useful:
static void Main(string[] args)
{
using (WebClient wc = new WebClient())
{
string s = wc.DownloadString("http://feeds.bbci.co.uk/news/health/rss.xml");
XmlElement tbr = null;
XmlDocument xml = new XmlDocument();
xml.LoadXml(s);
foreach (XmlNode node in xml["rss"]["channel"].ChildNodes)
{
if (node.Name.Equals("item") && node["title"].InnerText.StartsWith("VIDEO"))
{
Console.WriteLine(node["title"].InnerText);
}
else
{
node.ParentNode.RemoveChild(node);
}
}
xml.Save("NewXmlDoc.xml");
Console.WriteLine("
Done...");
Console.Read();
}
}
我也尝试了 RemoveAll 方法,但效果不佳,因为它删除了所有不满足VIDEO"条件的节点.
I have also tried the RemoveAll method, which does not work as well, because it removes all the nodes not satisfying the "VIDEO" condition.
//same code as above, just the else statement is changed
else
{
node.RemoveAll();
}
你能帮帮我吗?
推荐答案
我发现 Linq To Xml 更容易使用
I find Linq To Xml easier to use
var xDoc = XDocument.Load("http://feeds.bbci.co.uk/news/health/rss.xml");
xDoc.Descendants("item")
.Where(item => !item.Element("title").Value.StartsWith("VIDEO"))
.ToList()
.ForEach(item=>item.Remove());
xDoc.Save("NewXmlDoc.xml");
你也可以使用XPath
foreach (var item in xDoc.XPathSelectElements("//item[not(starts-with(title,'VIDEO:'))]")
.ToList())
{
item.Remove();
}
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本文标题为:删除 XML 节点


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