由网友(浪你个浪)分享简介:如何从使用的XDocument LINQ获取XML元素?How to Get an XML Element from XDocument using LINQ ?假设我有一个XDocument命名xmlDoc中,其中如下所示:Suppose I have an XDocument Named XMLDoc whi...
如何从使用的XDocument LINQ获取XML元素?
How to Get an XML Element from XDocument using LINQ ?
假设我有一个XDocument命名xmlDoc中,其中如下所示:
Suppose I have an XDocument Named XMLDoc which is shown below:
<Contacts>
<Node>
<ID>123</ID>
<Name>ABC</Name>
</Node>
<Node>
<ID>124</ID>
<Name>DEF</Name>
</Node>
</Contacts>
XElement Contacts = from xml2 in XMLDoc.Elements("Contacts").Elements("Node")
where xml2.Element("ID").Value == variable
select xml2;
不过,我收到错误对象引用不设置......
But I am getting Error "Object Reference is NOT to set....."
如何从使用LINQ一个XML文件中的特定节点? 我想在这点更新一些值?
How to get a particular Node from a XML file using LINQ ? And I want to update some values in that node ?
它是如何可能????
How it is possible ????
在此先感谢.........
Thanks in advance.........
推荐答案
响应additional问题发布的OP。
的test.xml:
<?xml version="1.0" encoding="utf-8"?>
<Contacts>
<Node>
<ID>123</ID>
<Name>ABC</Name>
</Node>
<Node>
<ID>124</ID>
<Name>DEF</Name>
</Node>
</Contacts>
选择一个节点:
XDocument XMLDoc = XDocument.Load("test.xml");
string id = "123"; // id to be selected
XElement Contact = (from xml2 in XMLDoc.Descendants("Node")
where xml2.Element("ID").Value == id
select xml2).FirstOrDefault();
Console.WriteLine(Contact.ToString());
删除一个节点:
XDocument XMLDoc = XDocument.Load("test.xml");
string id = "123";
var Contact = (from xml2 in XMLDoc.Descendants("Node")
where xml2.Element("ID").Value == id
select xml2).FirstOrDefault();
Contact.Remove();
XMLDoc.Save("test.xml");
添加新节点:
XDocument XMLDoc = XDocument.Load("test.xml");
XElement newNode = new XElement("Node",
new XElement("ID", "500"),
new XElement("Name", "Whatever")
);
XMLDoc.Element("Contacts").Add(newNode);
XMLDoc.Save("test.xml");
还有一个很不错的教程解析XMLS 这里。希望它能帮助。
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