c# - .NET，C#: How to add a custom serialization attribute that acts as ISerializable interface

我正在对db linq对象进行一些序列化，这些对象包含EntitySet和EntityRef类。

我发现了一种非常简单的方法来处理这些类的序列化，方法是简单地使用ISerializable正确处理此类型的成员(将它们转换为列表进行序列化，并在反序列化时撤消它)。

但是，如果我能做的话，那将是非常好的:

[Serializable]
[SerializeLinqEntities]
partial class Person
{ ... }

代替:

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);
  }
}

有没有办法做到这一点？我浏览了序列化类，似乎找不到任何方法来设置自定义序列化筛选器例程(可以在其中查找我的自定义属性)。

谢谢!

最佳答案

是的，您可以通过实现ISerializationSurrogate和ISurrogateSelector接口(interface)来实现。

像这样的东西:

[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);
        }
    }
}

关于c# - .NET，C#: How to add a custom serialization attribute that acts as ISerializable interface，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/2174591/