我想实现一个C#类的ISerializable其中包含类似的子类型列表。考虑下面的例子:ISerializable与递归儿童
using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
namespace serialisation
{
[Serializable]
internal class Nested : ISerializable
{
public string Name { get; set; }
public List<Nested> Children { get; set; }
public Nested(string name)
{
Name = name;
Children = new List<Nested>();
}
protected Nested(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
{
Name = info.GetString("Name");
// This doesn't work:
Nested[] children = (Nested[])info.GetValue("Children", typeof(Nested[]));
Children = new List<Nested>(children);
// This works:
// Children = (List<Nested>)info.GetValue("Children", typeof(List<Nested>));
}
public void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
{
info.AddValue("Name", Name);
// This doesn't work:
info.AddValue("Children", Children.ToArray());
// This works:
//info.AddValue("Children", Children);
}
}
internal class Program
{
private static void Main(string[] args)
{
// Generate a hierarchy
Nested root = new Nested("root");
Nested child1 = new Nested("child1");
Nested child2 = new Nested("child2");
Nested child3 = new Nested("child3");
child1.Children.Add(child2);
child1.Children.Add(child3);
root.Children.Add(child1);
Nested deserialized;
BinaryFormatter binaryFmt = new BinaryFormatter();
// Serialize
using (var fs = new FileStream("Nested.xml", FileMode.OpenOrCreate))
{
binaryFmt.Serialize(fs, root);
}
// Deserialize
using (var fs = new FileStream("Nested.xml", FileMode.OpenOrCreate))
{
deserialized = (Nested)binaryFmt.Deserialize(fs);
}
// deserialized.Children contains one null child
Console.WriteLine("Original Name: {0}", root.Name);
Console.WriteLine("New Name: {0}", deserialized.Name);
}
}
}
在上面的示例,Nested.GetObjectData和嵌套串行构造被调用的4倍,一个接一个。
将子元素作为Nested数组添加到序列化程序将在反序列化时返回正确大小的数组,但所有元素都将为null。
但是,将类型从嵌套数组更改为嵌套列表将会在调用子组件的构造函数后奇迹般地修复null元素。
我想知道的是:
- 什么特别的嵌套列表?
- 推荐使用递归结构来序列化类的建议方法是什么?
更新:
似乎有额外的接口,IDeserializationCallback.OnDeserialization,这是反序列化后调用已经发生(调用顺序是不确定的)。您可以将反序列化的数组存储在构造函数中的临时成员变量中,然后将其分配给此方法中的列表。除非我错过了一些东西,否则这看起来不太理想,因为你必须用临时变量混乱你的实现。
我相信这是一个已经回答了类似的问题:http://stackoverflow.com/questions/4339602 /阵列反序列化总是给出一个空数组 –
我几分钟前也发现了同样的问题。我之前的搜索条件一定不够具体...... – ChocolatePocket