LINQ to XML 查询属性

csharp
// 加载XML文档
XDocument doc = XDocument.Load("data.xml");
// 查询具有特定属性的XML元素
var elements = from element in doc.Descendants("book")
               where element.Attribute("category").Value == "Sci-Fi"
               select element;
// 遍历查询结果并输出属性值
foreach (var element in elements)
{
    Console.WriteLine(element.Attribute("title").Value);
}

xml
  
  
  
  

csharp
// 加载XML文档
XDocument doc = XDocument.Load("library.xml");
// 查询库存数量小于10的图书
var books = from book in doc.Descendants("book")
            where int.Parse(book.Attribute("stock").Value) < 10
            select book;
// 遍历查询结果并输出ISBN属性值
foreach (var book in books)
{
    Console.WriteLine(book.Attribute("ISBN").Value);
}