c# - 使用 XmlSerializer 序列化派生类

Question

我正在使用 XMLSerializer 序列化包含通用列表的对象

List <ChildBase> Children {get;set}

问题是每个元素都来自 ChildBase这实际上是一个抽象类。当我尝试反序列化时，我得到一个 invalidOperationException

有没有一种方法可以将 XMLSerializer 用于派生对象？谢谢。

Answer 1

可以通过三种方式做到这一点；您可以对类型使用 [XmlInclude]，也可以对属性使用 XmlElement/XmlArrayItem。它们都显示在下面；取消注释您喜欢的对:

using System;
using System.Collections.Generic;
using System.Xml.Serialization;
public class MyWrapper {
    //2: [XmlElement("A", Type = typeof(ChildA))]
    //2: [XmlElement("B", Type = typeof(ChildB))]
    //3: [XmlArrayItem("A", Type = typeof(ChildA))]
    //3: [XmlArrayItem("B", Type = typeof(ChildB))]
    public List<ChildClass> Data { get; set; }
}
//1: [XmlInclude(typeof(ChildA))]
//1: [XmlInclude(typeof(ChildB))]
public abstract class ChildClass {
    public string ChildProp { get; set; }
}
public class ChildA : ChildClass {
    public string AProp { get; set; }
}
public class ChildB : ChildClass {
    public string BProp { get; set; }
}
static class Program {
    static void Main() {
        var ser = new XmlSerializer(typeof(MyWrapper));
        var obj = new MyWrapper {
            Data = new List<ChildClass> {
                new ChildA { ChildProp = "abc", AProp = "def"},
                new ChildB { ChildProp = "ghi", BProp = "jkl"}}
        };
        ser.Serialize(Console.Out, obj);
    }
}