使用DataContractSerializer进行自定义序列化

Question

我目前正在为我的DataSet使用包装类,以实现自定义序列化.我想使用DataContractSerializer(更像是必须使用它)但仍然支持自定义序列化.问题是,[DataContract]和[Serializable]属性似乎并没有很好地相处...我怎么能覆盖序列化,并支持BOTH DataContract和ISerializable序列化？包装器DataSet类的代码带到这里:

[Serializable()]    
[System.Runtime.InteropServices.ComVisible(false)]
public class TestDatasetWrapper : TestDataSet, ISerializable
{
    public TestDatasetWrapper()
        : base()
    {}

    protected TestDatasetWrapper(SerializationInfo info, StreamingContext context)
    {
        SerializationHelper.DeserializeTypedDataSet(info, this);
    }

    public override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        SerializationHelper.AddTypedDataSetObjectData(info, this);
    }
}

谢谢!

Answer 1

DataContractAttribute和SerializableAttribute都可以一起使用.这里的奖励是,您不需要使用单独的序列化器.DataContractSerialzer是一个XmlObjectSerializer,它本身支持[Serializable].例如:

[Serializable]
public class TestClass
{
    public string Name { get; set; }
}

{
    var formatter = new DataContractSerializer(typeof(TestClass));
    using (var stream = new MemoryStream())
    {
        var instance = new TestClass { Name = "Matt" };
        formatter.WriteObject(stream, instance);

        stream.Seek(0, SeekOrigin.Begin);

        var second = (TestClass) formatter.ReadObject(stream);
        Console.WriteLine(second.Name);
    }
}

输出:"马特"

使用一个SerializableAttribute属性,我们可以使用DataContractSerializer成功地序列化和反序列化对象...

使用ISerializable,我们可以做同样的事情:

[Serializable]
public class TestClass2 : ISerializable
{
    public TestClass2() { }
    protected TestClass2(SerializationInfo info, StreamingContext context)
    {
        Name = info.GetString("name").ToUpper();
    }

    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("name", Name);
    }

    public string Name { get; set; }
}

{
    var formatter = new DataContractSerializer(typeof(TestClass2));
    using (var stream = new MemoryStream())
    {
        var instance = new TestClass2 { Name = "Matt" };
        formatter.WriteObject(stream, instance);

        stream.Seek(0, SeekOrigin.Begin);

        var second = (TestClass2)formatter.ReadObject(stream);
        Console.WriteLine(second.Name);
    }
}

输出:"MATT"

并使用DataContractAttribute:

[DataContract, Serializable]
public class TestClass3
{
    public int Age { get; set; }

    [DataMember]
    public string Name { get; set; }
}

{
    var formatter = new DataContractSerializer(typeof(TestClass3));
    using (var stream = new MemoryStream())
    {
        var instance = new TestClass3 { Name = "Matt", Age = 26 };
        formatter.WriteObject(stream, instance);

        stream.Seek(0, SeekOrigin.Begin);

        var second = (TestClass3)formatter.ReadObject(stream);
        Console.WriteLine(second.Name);
        Console.WriteLine(second.Age);
    }
}

输出:"马特"

输出:0

当DataContractSerializer遇到带有DataContractAttribute的类型时,它将使用它而不是将序列化传递给它的基类型,后者处理SerializableAttribute和ISerializable接口.

如果遇到问题,是序列化还是反序列化,或两者兼而有之？