Linq to XML-反序列化到对象

Question

I have been able to get Linq to XML to work, but I wanted to see if there was a more efficient way of applying the elements to an object rather then putting a foreach statement after I have traversed the xml? I know you can use lamba expressions, but not sure how to apply that to this or if that is possible?

Any suggestions greatly appreciated.

List<Order> myOrders = new List<Order>();

var orders = from order in xdoc.Descendants("Order")
             select new{
                  OrderNumber = order.Element("OrderNumber").Value,
                  OrderDate = order.Element("OrderDate").Value,
                  OrderTotal = order.Element("OrderTotal").Value
             };

foreach(var ord in orders)
{
   myOrders.OrderNumber = ord.OrderNumber;
   myOrders.OrderDate = ord.OrderDate;
   myOrders.OrderTotal = ord.OrderTotal;
}

Answer 1

Simply select Order instances:

var orders = from order in xdoc.Descendants("Order")
             select new Order {
                  OrderNumber = order.Element("OrderNumber").Value,
                  OrderDate = order.Element("OrderDate").Value,
                  OrderTotal = order.Element("OrderTotal").Value
             };

orders will be of type IEnumerable<Order> , but if you need a list:

List<Order> myOrders = orders.ToList();

Answer 2

use the following as replacement for the code you posted

List<Order> myOrders = (from order in xdoc.Descendants("Order")
                        select new Order {
                        OrderNumber = order.Element("OrderNumber").Value,
                        OrderDate = order.Element("OrderDate").Value,
                        OrderTotal = order.Element("OrderTotal").Value
                        }).ToList();

Answer 3

List<Order> myOrders = new List<Order>();

var orders = xdoc.Descendants("Order").Select(x=> new Order{ 
    OrderNumber = x.Element("OrderNumber").Value,
    OrderDate = x.Element("OrderDate").Value,
    OrderTotal = x.Element("OrderTotal").Value
    });

myOrders.AddRange(orders) // or just orders.ToList();