zoukankan      html  css  js  c++  java
  • C# linq to xml 简单示例

    data.xml

     1 <?xml version="1.0" encoding="utf-8" ?>
     2 <Data>
     3   <Products>
     4     <Product Name="West Side Story" Price="9.99" SupplierID="1" />
     5     <Product Name="Assassins" Price="14.99" SupplierID="2" />  
     6     <Product Name="Frogs" Price="13.99" SupplierID="1" />
     7     <Product Name="Sweeney Todd" Price="10.99" SupplierID="3" />
     8   </Products>
     9 
    10   <Suppliers>
    11     <Supplier Name="Solely Sondheim" SupplierID="1" />
    12     <Supplier Name="CD-by-CD-by-Sondheim" SupplierID="2" />
    13     <Supplier Name="Barbershop CDs" SupplierID="3" />
    14   </Suppliers>
    15 </Data>

    通过 linq to xml ,查找价格超过10的产品,并打印供应商名称与产品名称;

     1             XDocument doc = XDocument.Load("data.xml");
     2             var filtered = from p in doc.Descendants("Product")
     3                            join s in doc.Descendants("Supplier")
     4                            on (int)p.Attribute("SupplierID")
     5                            equals (int)s.Attribute("SupplierID")
     6                            where (decimal)p.Attribute("Price") > 10
     7                            select new
     8                            {
     9                                ProductName = (string)p.Attribute("Name"),
    10                                SupplierName = (string)s.Attribute("Name")
    11                            };
    12 
    13             foreach (var v in filtered)
    14             {
    15                 Console.WriteLine("SupplierName={0} , ProductName={1}", v.SupplierName, v.ProductName);
    16             }

    输出

    SupplierName=CD-by-CD-by-Sondheim , ProductName=Assassins
    SupplierName=Solely Sondheim , ProductName=Frogs
    SupplierName=Barbershop CDs , ProductName=Sweeney Todd

     

    参考资料

    1、深入理解C#(第2版);

  • 相关阅读:
    CDQ
    MySQL中的类Decode用法
    HTMLTestRunner生成空白resault.html
    参数化时按行读取txt文件,如何去掉换行符" "
    打开本地html的一些设置
    python中文乱码例子
    Python异常处理实例
    Python根据上下限生成不重复随机数1
    Linux自定义命令
    Python IDLE 清屏工具
  • 原文地址:https://www.cnblogs.com/fanful/p/7954933.html
Copyright © 2011-2022 走看看