c# - 使用 XDocument 解析 xml - 反序列化

Question

我有以下 xml

<?xml version="1.0" encoding="UTF-8"?>
<Actions>
    <add order-id="1" symbol="ABC" price="5" quantity="200" />
    <add order-id="2" symbol="123" price="15" quantity="100" />
    <add order-id="3" symbol="ABC" price="5" quantity="300" />
    <add order-id="4" symbol="ABC" price="7" quantity="150" />
    <edit order-id="1" price="7" quantity="200" />
    <remove order-id="4" />
    <add order-id="5" symbol="123" price="17" quantity="300" />
    <add order-id="6" symbol="123" price="12" quantity="150" />
    <edit order-id="3" price="7" quantity="200" />
    <remove order-id="5" />
</Actions>

我需要使用 linq 将其解析为以下对象结构:

 internal class OrderAction
    {
        private readonly Action action;
        private readonly Order order;
        public Action Action { get { return action; }}
        public Order Order { get { return order; }}

        public OrderAction(Action action,Order order)
        {
            this.action = action;
            this.order = order;
        }
    }

其中一个 Action 是public enum Action { ADD, REMOVE, EDIT }

命令如下:

class Order
    {
        public Order(long orderId, String symbol, int price, int quantity)
        {
            this.orderId = orderId;
            this.symbol = symbol;
            this.price = price;
            this.quantity = quantity;
        }

        public long orderId { get; private set; }
        public String symbol { get; private set; }
        public int price { get; private set; }
        public int quantity { get; private set; }
}

我需要将 xml 加载到 xdocument 中，并在文件中找到所有 IEnumerable of orderactions。如果不求助于序列化属性，我该怎么做？

Answer 1

在“编辑和删除”的情况下，缺少的 Order 属性的值应该是什么？我假定 string 和 int< 的默认值...

这将是 LINQ 语句(假设您的 XDocument 称为 doc):

var result = doc
    .Root
    .Elements()
    .Select(elem => new OrderAction
            (
                (Action)Enum.Parse(typeof(Action), elem.Name.LocalName.ToUpper()),
                new Order
                (
                    elem.Attributes("order-id").Select(x => long.Parse(x.Value)).FirstOrDefault(),
                    elem.Attributes("symbol").Select(x => x.Value).FirstOrDefault(),
                    elem.Attributes("price").Select(x => int.Parse(x.Value)).FirstOrDefault(),
                    elem.Attributes("quantity").Select(x => int.Parse(x.Value)).FirstOrDefault()
                )
            ));