使用此代码序列化对象时：
public object Clone()
{
var serializer = new DataContractSerializer(GetType());
using (var ms = new System.IO.MemoryStream())
{
serializer.WriteObject(ms,this);
ms.Position = 0;
return serializer.ReadObject(ms);
}
}
我注意到它没有复制关系.
有没有办法让这种情况发生？
解决方法
只需使用接受preserveObjectReferences的构造函数重载,并将其设置为true：
using System;
using System.Runtime.Serialization;
static class Program
{
public static T Clone<T>(T obj) where T : class
{
var serializer = new DataContractSerializer(typeof(T),null,int.MaxValue,false,true,null);
using (var ms = new System.IO.MemoryStream())
{
serializer.WriteObject(ms,obj);
ms.Position = 0;
return (T)serializer.ReadObject(ms);
}
}
static void Main()
{
Foo foo = new Foo();
Bar bar = new Bar();
foo.Bar = bar;
bar.Foo = foo; // nice cyclic graph
Foo clone = Clone(foo);
Console.WriteLine(foo != clone); //true - new object
Console.WriteLine(clone.Bar.Foo == clone); // true; copied graph
}
}
[DataContract]
class Foo
{
[DataMember]
public Bar Bar { get; set; }
}
[DataContract]
class Bar
{
[DataMember]
public Foo Foo { get; set; }
}
