如何序列化继承类具有protobuf网 [英] How to Serialize Inherited Class with ProtoBuf-Net

问题描述

我很抱歉，如果这是一个重复。我已经搜索几个地方寻找答案，我能明白其中包括：

I am sorry if this is a duplicate. I have searched several places for an answer that I might understand including:

的 ProtoBuf.net Base类的属性不包括当序列化派生类

序列化继承类使用protobuf网

我道歉，但我并没有真正理解的答案。我找了一个更快更紧凑的二进制序列和protobuf的看起来似乎是答案。我需要序列化一组从单一基类派生类。有这么犯编辑类代码我跑了一个简单的测试之前，大量的人。 。此外，我不希望以任何方式修改可能影响反序列化老年与NET二进制序列产生持久文件中的类

My apologies but I did not really understand the answers. I am looking for a faster more compact binary serializer and ProtoBuf looks like it might be the answer. I need to serialize a set of classes that all derive from a single base class. There are a large number of them so before committing to edit the class code I ran a simple test. Also I do not want to modify the classes in any way that might impact deserializing older persisted files generated with the NET binary serializer.

这是基类：

[ProtoContract]
    public class BaseClass
    {
        [ProtoMember(1)]
        public string Name
        {
            get; set;
        }
        [ProtoMember(2)]
        public int Age
        {
            get; set;
        }
    }

这是派生类：

[ProtoContract]
    public class SubClass1 : BaseClass
    {
        [ProtoMember(3)]
        public string Town
        {
            get; set;
        }

        [ProtoMember(4)]
        public Sex Sex
        {
            get; set;
        }
    }

这是代码序列化和反序列化（直接取从入门指南

This is the code to serialize and deserialize (taken directly from the Getting Started Guide

var person = new SubClass1 { Age = 25, Name = "Fred", Town = "Denbigh", Sex = Sex.Female };

            using (var file = File.Create(filename))
            {
                Serializer.Serialize(file, person);
            }

和德-serialize：

and de -serialize:

SubClass1 newPerson;
            using (var file = File.OpenRead(filename))
            {
                newPerson = Serializer.Deserialize<SubClass1>(file);
            }

            MessageBox.Show(newPerson.Name + 
                " : " + newPerson.Town + 
                " : " + newPerson.Age.ToString() + 
                " : " + newPerson.Sex);

结果是：登比：0：女

不知何故从基类属性的值没有被序列化？我原来的ProtoMember指数派生类测试它作为1，2，我样的想法，不会让工作去了3，4，这似乎没有什么区别。在我的偏执狂，我跑使用标准NET二进制序列相同的测试，得到了预期的结果：弗雷德：登比：25：女

Somehow the values from the base class properties are not being serialized? I originally tested it with the ProtoMember indices for the derived class as 1, 2. I kind of thought that would not work so went for 3, 4. It seems to make no difference. In my paranoia I ran the same test using the standard NET binary serializer and got the expected result: "Fred : Denbigh : 25 : Female"

我在想什么吗？

推荐答案

您需要使用 ProtoInclude 属性上的基础类：

You need to use the ProtoInclude attribute on your base class:

[ProtoContract]
[ProtoInclude(500, typeof(SubClass1 ))]
public class BaseClass
{

的ID精氨酸（500在上面的例子）应该是唯一的那类。请参见这文章以了解更多信息。

The id arg (500 in the above example) should be unique to that class. See this article for more information

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