c# - Linq to XML 未获取所有节点

Question

<?xml version="1.0" encoding="utf-8"?>
<OrdersReport Date="2012-08-01">
<Returns>
      <Amount>
        <OrderId>2</OrderId>
        <OrderId>3</OrderId>
        <OrderId>21</OrderId>
        <OrderId>23</OrderId>
      </Amount>
    </Returns>
</OrdersReport>

这是我试图获取 OrderId 的代码:

 var amount = doc.Descendants("Amount")                         
  .Select(y => new
  {
   OrderId = (int)y.Element("OrderId")
   });
foreach (var r in amount)
  {
   Console.WriteLine(r.OrderId);
  }

 Console.Read();

我的输出是:

2
2

Answer 1

你可以这样做:

var orderIds = doc.Descendants("OrderId");
foreach (var orderId in orderIds)
{
    Console.WriteLine(orderId.Value);
}

或者，在这种情况下是相同的:

var orders = doc.Descendants("Amount")
                .Descendants("OrderId");