为什么System.Version在JSON字符串不正确反序列化？ [英] Why System.Version in JSON string does not deserialize correctly?

问题描述

上下文：我需要通过包含大量的属性/字段（以UI层从中间层层）的对象。在属性列表，一个是没有得到从JSON字符串格式正确类型的反序列化版本。我有一个选择的JSON格式基于XML的JSON序列化字符串将返回短字符串的结果。

Context: I need to pass an object containing a large number of properties/fields (to UI Layer from Middle Tier Layer). Among this list of properties, one is of type Version which is not getting deserialized correctly from JSON string format. I have a chosen JSON format over XML as JSON serialization to string will return short string result.

问题：
System.Version不能正确反序列化。我已经尝试了两种不同的.NET库。以下是各代码段：

Problem: System.Version does not get deserialized correctly. I have tried two different .NET Libraries. Following are the code snippets for each:

代码片段1 ServiceStack .NET库：

Code Snippet 1 using ServiceStack .NET library:

        var version = new Version(1, 2, 3, 0);
        string reportJSON = JsonSerializer.SerializeToString<Version>(version);
        //{"Major":1,"Minor":2,"Build":3,"Revision":0,"MajorRevision":0,"MinorRevision":0}


        Version report2 = JsonSerializer.DeserializeFromString<Version>(reportJSON);
        string reportJSON2 = JsonSerializer.SerializeToString<Version>(report2);
        //{"Major":0,"Minor":0,"Build":-1,"Revision":-1,"MajorRevision":-1,"MinorRevision":-1}

代码段2使用的 Newtonsoft .NET库但同样的结果：

Code Snippet 2 using Newtonsoft .NET library but with same result:

        var version = new Version(1, 2, 3, 0);
        string reportJSON = JsonConvert.SerializeObject(version);
        //{"Major":1,"Minor":2,"Build":3,"Revision":0,"MajorRevision":0,"MinorRevision":0}


        Version report2 = JsonConvert.DeserializeObject<Version>(reportJSON);
        string reportJSON2 = JsonConvert.SerializeObject(report2);
        //{"Major":0,"Minor":0,"Build":-1,"Revision":-1,"MajorRevision":-1,"MinorRevision":-1}

如何解决这一问题？或其他JSON.NET库可以正常工作？

How to fix this? Or Which other JSON.NET library can work correctly?

推荐答案

的 Newtonsoft.Json 库提供了一组在 Newtonsoft.Json.Converters 命名空间的常见转换器，其中的 VersionConverter 您可以使用序列化和反序列化 System.Version 。

The Newtonsoft.Json library provides a set of common converters in the Newtonsoft.Json.Convertersnamespace, including a VersionConverter you can use to serialize and deserialize System.Version.

注意，你必须使用 VersionConverter 无论是序列化和反序列化，虽然 。结果
这是因为标准序列化会产生eg.:{\"Major\":1,\"Minor\":2,\"Build\":3,\"Revision\":0,\"MajorRevision 0，MinorRevision：0} ，而 VersionConverter 反序列化需要一个简单的字符串作为1.2.3

Note that you have to use the VersionConverterboth for serialization and deserialization, though.
That's because standard serialization would generate eg.:{"Major":1,"Minor":2,"Build":3,"Revision":0,"MajorRevision":0,"MinorRevision":0} while VersionConverterdeserialization expects a simple string as in "1.2.3".

所以，用法是：

using Newtonsoft.Json;
using Newtonsoft.Json.Converters;  

string s = JsonConvert.SerializeObject(version, new VersionConverter());
Version v = JsonConvert.DeserializeObject<Version>(s, new VersionConverter());

我不知道什么是第一个版本的 Newtonsoft.Json ，它包含转换器。该矿拥有它，它是5.0.6。

I'm not sure what's the first version of Newtonsoft.Jsonthat includes that converter. Mine has it and it's 5.0.6.

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