Linq 操作XML文件

时间：2011-05-08 来源：※森林小居※

1.创建Xml树

<person id="1"> <name>Gaby</name> <age>12</age> <address>GuangZhou</address> </person> <person id="2"> <name>Bill</name> <age>33</ag e> <address>USA</address> </person> <person id="3"> <name>BiLy</name> <age>19</age> <address>HuNan</address> </person>

如果要创建如上的XML树：

代码示例：

XElement xmlTree = new XElement("Root",

   new XElement("person", new XElement("name", "Gaby"),
                                   new XElement("age",18),
                                   new XElement("address","GuangZhou")),

   new XElement("person", new XElement("name", "Lily"),
   new XElement("age",20),
                                   new XElement("address","USA")),

   new XElement("person", new XElement("name", "Bill"),
   new XElement("age",55),
   new XElement("address","English"))

);

foreach (var item in xmlTree.Elements())

{

Console.WriteLine(item);

}

输出结果：

2.读取XML文件

有以下XML文件：path:D:\NetDemo\LinqToXml\LinqToXml\XMLFile.xml

<?xml version="1.0" encoding="utf-8" ?>

<address>GuangZhou</address>

</person>

</person>

<address>HuNan</address>

</person>

<name>James</name>

<address>English</address>

</person>

</persons>

读取方法一： XElement xml = XElement.Load(@"D:"NetDemo"LinqToXml"LinqToXml"XMLFile.xml"); Console.WriteLine("读取XML..."); foreach (var item in xml.Elements("person")) { Console.WriteLine(item.Element("name").Value+""t" +item.Element("age").Value+""t" +item.Element("address").Value); } 读取方法二:（查询表达式） var persons = from p in xml.Elements("person") select new { Name = p.Element("name").Value, Age = p.Element("age").Value, Address = p.Element("address").Value

};

Console.WriteLine("读取XML...");

foreach (var item in persons) { Console.WriteLine(item.Name+"\t"+item.Age+"\t"+item.Address); } 读取方法三：（lambada表达式） var persons = xml.Elements("person").Select(p => new{
Id=p.Attribute("id").Value, //读取属性 Name = p.Element("name").Value, Age = p.Element("age").Value, Address = p.Element("address").Value } ); foreach (var item in persons) { Console.WriteLine(item.Name + ""t" + item.Age + ""t" + item.Address); }

输出结果（相同）：