Json.NET 不区分大小写的属性反序列化

问题描述

Json.NET 将不区分大小写的属性反序列化"列为宣传的功能之一.我已经阅读过，将首先尝试匹配指定属性的大小写，如果未找到匹配项，则执行不区分大小写的搜索.然而，这似乎不是默认行为.请参阅以下示例:

Json.NET lists "Case-insensitive property deserialization" as one of the advertised features. I have read that an attempt will first be made to match the case of the property specified and if a match is not found a case-insensitive search is performed. This does not appear to be the default behavior however. See the following example:

var result =
    JsonConvert.DeserializeObject<KeyValuePair<int, string>>(
        "{key: 123, value: "test value"}"
    );

// result is equal to: default(KeyValuePair<int, string>)

如果 JSON 字符串被更改以匹配属性的大小写(Key"和Value"与key"和value")，那么一切都很好:

If the JSON string is altered to match the case of the properties ("Key" and "Value" vs "key" and "value") then all is well:

var result =
    JsonConvert.DeserializeObject<KeyValuePair<int, string>>(
        "{Key: 123, Value: "test value"}"
    );

// result is equal to: new KeyValuePair<int, string>(123, "test value")

有没有办法执行不区分大小写的反序列化?

Is there a way to perform to case-insensitive deserialization?

推荐答案

这是一个错误.

不区分大小写的属性反序列化是指 Json.NET 能够将名为Key"的 JSON 属性映射到 .NET 类的Key"或key"成员.

Case-insensitive property deserialization refers to Json.NET being able to map a JSON property with the name "Key" to either a .NET class's "Key" or "key" member.

错误是 KeyValuePair 需要它自己的 JsonConverter 但错过了不区分大小写的映射.

The bug is KeyValuePair requires its own JsonConverter but misses out of the case insensitive mapping.

https://github.com/JamesNK/Newtonsoft.Json/blob/fe200fbaeb5bad3852812db1e964473e1f881d93/Src/Newtonsoft.Json/Converters/KeyValuePairConverter.cs

以它为基础，在读取 JSON 时将小写的key"和value"添加到 case 语句中.

Use that as a base and add the lower case "key" and "value" to the case statement when reading JSON.

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