我正在对db linq对象进行一些序列化,其中包含EntitySet和EntityRef类。
我找到了一种非常简单的方法来处理这些类的序列化,只需使用ISerializable来正确处理这种类型的成员(将它们转换为序列化列表,并在反序列化时撤消它)。
然而,如果我能这样做,那将是非常好的:
[Serializable]
[SerializeLinqEntities]
partial class Person
{ ... }
而不是:
partial class Person : ISerializable
{
public virtual void GetObjectData( SerializationInfo si, StreamingContext ctxt )
{
EntitySerializer.Serialize(this, typeof(Person), si, ctxt);
}
protected Person( SerializationInfo si, StreamingContext ctxt )
{
EntitySerializer.Deerialize(this, typeof(Person), si, ctxt);
}
}
有办法做到这一点吗?我查看了序列化类,似乎无法找到任何方法来设置自定义序列化过滤器例程(我可以在那里查找我的自定义属性)。
谢谢!
答案 0 :(得分:7)
是的,您可以通过实施ISerializationSurrogate和ISurrogateSelector接口来实现此目的。
这样的事情:
[AttributeUsage(AttributeTargets.Class)]
public class SerializeLinqEntities : Attribute
{
}
public class LinqEntitiesSurrogate : ISerializationSurrogate
{
public void GetObjectData(
object obj, SerializationInfo info, StreamingContext context)
{
EntitySerializer.Serialize(this, obj.GetType(), info, context);
}
public object SetObjectData(
object obj, SerializationInfo info,
StreamingContext context, ISurrogateSelector selector)
{
EntitySerializer.Deserialize(obj, obj.GetType(), info, context);
return obj;
}
}
/// <summary>
/// Returns LinqEntitySurrogate for all types marked SerializeLinqEntities
/// </summary>
public class NonSerializableSurrogateSelector : ISurrogateSelector
{
public void ChainSelector(ISurrogateSelector selector)
{
throw new NotImplementedException();
}
public ISurrogateSelector GetNextSelector()
{
throw new NotImplementedException();
}
public ISerializationSurrogate GetSurrogate(
Type type, StreamingContext context, out ISurrogateSelector selector)
{
if (!type.IsDefined(typeof(SerializeLinqEntities), false))
{
//type not marked SerializeLinqEntities
selector = null;
return null;
}
selector = this;
return new LinqEntitiesSurrogate();
}
}
[SerializeLinqEntities]
public class TestSurrogate
{
public int Id { get; set; }
public string Name { get; set; }
}
class Program
{
static void Main(string[] str)
{
var ns1 = new TestSurrogate {Id = 47, Name = "TestName"};
var formatter = new BinaryFormatter();
formatter.SurrogateSelector = new NonSerializableSurrogateSelector();
using (var ms = new MemoryStream())
{
formatter.Serialize(ms, ns1);
ms.Position = 0;
var ns2 = (TestSurrogate) formatter.Deserialize(ms);
// Check serialization
Debug.Assert(ns1.Id == ns2.Id);
Debug.Assert(ns1.Name == ns2.Name);
}
}
}
答案 1 :(得分:0)
不幸的是,ISerializable
是一个界面,旨在让您控制序列化过程,而SerializableAttribute
只是一个标记,表示“此类可以序列化”。但是,您可以查看PostSharp之类的内容来添加此功能(请查看CompositionAspect
)。