Linq to XML函数构造

函数构造是指通过单个语句构建XML树的能力.我们已经体验了如何使用XElement和XAttribute类手工创建XML树,也可以通过其他XElement和XAttribute对象传递给XElement类的构造函数来创建子元素和属性,也就是说,LINQ查询的结果可以用来创建XML树,下面就来看看一个演示:

//-----------------------------------------------------------
// All Rights Reserved , Copyright (C) 2010 ,黄聪 , Ltd .
//-----------------------------------------------------------

using System;
using System.Xml.Linq;
using System.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            XElement xel = new XElement(new XElement("Root",
                new XElement("Person",
                    new XElement("Name", "Huang Cong"),
                    new XElement("Sex", "男"),
                    new XElement("Age", 22)),
                new XElement("Person",
                    new XElement("Name", "Li Si"),
                    new XElement("Sex", "女"),
                    new XElement("Age", 12))
                    ));

            //通过LINQ查询将xel的元素添加至新的XElement中
            XElement newXel = new XElement(new XElement("NewRoot",
                new XElement("Persons",
                    xel.Elements().Where(u => u.Name == "Person").Select(u => u)
                    )));

            Console.WriteLine(newXel);
        }
    }
}