如何 serialize/deserialize class-IList 集合的包装器？

Question

我有基础 class Control，其中包含属性 public ControlCollection Controls;:

public abstract class Control { 
    ...
    public virtual string Name { get: set; }
    public ControlCollection Controls;
    public Control parent = null;
    ...
}

ControlCollection 是我自己的 class，它实现了 IList<Control>:

public sealed class ControlCollection : IList<Control>, IMySerializable {       
    public int Count => _controls.Count;
    public bool IsReadOnly { get; } = false;
    public Control Parent;

    private List<Control> _controls = new List<Control>();

    public ControlCollection(Control parent) {
        Parent = parent ?? throw new ArgumentNullException("parent");
    }

    public Control this[int index] {
        get => _controls[index];
        set => _controls[index] = value;
    }

    public void Add(Control child) {
        child.parent = Parent;
        _controls.Add(child);
    }

    ...
}

如果我将属性 Controls 的类型从 ControlCollection 更改为 List<Control>，那么下面的代码将形成一个正确的 XML 文件

// temp data
Control rootObj = new Button();  rootObj.Name = "111";
Control obj2 = new Label();   obj2.Name = "222";
Control obj3 = new Button();  obj3.Name = "333";    
rootObj.Controls.Add(obj2); 
rootObj.Controls.Add(obj3);

List<Type> list = new List<Type>();
rootObj.Controls.ForEach(child => child.DoActionWithChildren(node => {
    list.Add(node.GetType());
}));

list.Add(typeof(Button));
list = list.Distinct().ToList();

// trying to set xml attributes. 'Controls' property will be a root of collection
var attributes = new XmlAttributes();
list.ForEach(t => attributes.XmlArrayItems.Add(new XmlArrayItemAttribute(t)));
var attrOverride = new XmlAttributeOverrides();
attrOverride.Add(typeof(Control), "Controls", attributes); 

// save data to file    
using(StreamWriter sw = new StreamWriter("path/to/xml/file.xml", false, Encoding.UTF8)) {
    XmlSerializer xs = new XmlSerializer(typeof(Control), attrOverride);        
    XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
    ns.Add(string.Empty, string.Empty);
    xs.Serialize(sw, rootObj, ns);  
}

/* ---------------------- */
output:

<?xml version="1.0" encoding="utf-8"?>
<Control d1p1:type="Button" xmlns:d1p1="http://www.w3.org/2001/XMLSchema-instance">
  <Controls>
    <Control d1p1:type="Label">
      <Controls />      
      <Name>22222</Name>
    </Control>
    <Control d1p1:type="Button">
      <Controls />
      <Name>32333</Name>      
    </Control>
  </Controls>  
  <Name>1111</Name>  
</Control>

但是如果属性Controls的一个类型是ControlCollection，那么XML就会被截断：

<?xml version="1.0" encoding="utf-8"?>
<Button>
  <Controls>
    <Control d3p1:type="Label" xmlns:d3p1="http://www.w3.org/2001/XMLSchema-instance">
      <Controls />

我尝试更改类型：attrOverride.Add(typeof(ControlCollection), "Controls", attributes);，但这不起作用。

我应该怎么做才能正确序列化 ControlCollection？我应该知道什么才能在之后正确反序列化它？

Answer 1

嗯，我修好了。原来我有一个循环引用，因为我的基础 class 中有一个属性 public Control parent = null;。我写了一个属性 [XmlIgnore] 并且它有效，即使使用 attrOverride.Add(typeof(ControlCollection), "Controls", attributes);

之所以没有看到这个错误，是因为我原来的项目是Unity项目。 Unity 没有向我显示该错误。当我制作一个简单的 C# 控制台应用程序时 - 它向我显示了该错误。很悲伤，但是很真实。

如何 serialize/deserialize class-IList 集合的包装器？

How to serialize/deserialize class-wrapper of IList collection?

c#

serialization

xmlserializer