LINQ To XML

1.多采购订单

XElement elements = XElement.Load(Server.MapPath("../Linqxml/PurchaseOrders.xml")); /*示例演示如何查找具有 Type 属性等于“Shipping”的子 Address 元素和等于“NY”的子 State 元素的所有 PurchaseOrder 元素。示例在 Where 子句中使用嵌套查询，如果集合中有任何元素，则 Any 运算符返回 true */ IEnumerable<XElement> Elements = from el in elements.Elements("PurchaseOrder") where ( from add in el.Elements("Address") where (string)add.Attribute("Type") == "Shipping" && (string)add.Element("State") == "NY" select add ).Any() select el; foreach (XElement el in Elements) { Console.WriteLine((string)el.Attribute("PurchaseOrderNumber")); }

2.创建XML

信息如下

<Books> <Book title="LINQ"> <Publisher>Mirosoft</Publisher> <year>2010</year> </Book> <Book title="C# 4.0"> <Publisher>Mirosoft</Publisher> <year>2010</year> </Book> <Book title="SQL2008"> <Publisher>Mirosoft</Publisher> <year>2010</year> </Book> </Books>
C#

class book { public string title; public string publisher; public int year; public book(string title, string publisher, int year) { this.title = title; this.publisher = publisher; this.year = year; } } class InitialArray { static void Main() { book[] myBook = new book[] { new book("LINQ","Mirosoft",2010), new book("C# 4.0","Mirosoft",2010), new book("SQL2008","Mirosoft",2010) }; XElement Element = new XElement("Books", from books in myBook select new XElement("Book", new XAttribute("title", books.title), new XElement("Publisher", books.publisher), new XElement("year", books.year))); Console.WriteLine(Element); } }