如何关闭或处理 JSON 响应 ASP.NET Core 中的 camelCasing? [英] How to turn off or handle camelCasing in JSON response ASP.NET Core?

问题描述

我正在学习有关 ASP.NET Core/Web API/Angular 2 的 WintellectNOW 课程.我实现了 API 部分，但无论出于何种原因，返回的 JSON 的变量名称都被小写.

返回的 JSON 格式如下...

<预><代码>[{"id":1,"name":"Bowler","color":"black","count":1},{"id":2,"name":"Fedora","color":"red","count":1},{"id":3,"name":"棒球帽","color":"blue","count":3}]

我期待...

<预><代码>[{"Id":1,"Name":"Bowler","Color":"black","Count":1},{"Id":2,"Name":"Fedora","Color":"red","Count":1},{"Id":3,"Name":"Baseball Cap","Color":"blue","Count":3}]

基于...的 C# 模型

命名空间 HatCollection.Models{公开课帽子{公共 int Id { 获取；放;}公共字符串名称{获取；放;}公共字符串颜色{获取；放;}公共 int 计数 { 得到；放;}}}

我什至用 [DataMember(Name = "Id")] 装饰属性只是为了确保它仍然无关紧要.

偶尔，它与控制器中的 Action 和实例变量相关...

私有静态只读列表<帽子>MyHats = 新列表<帽子>{新帽子 {Id = 1, Name = "Bowler", Color = "black", Count = 1 },新帽子 {Id = 2, Name = "Fedora", Color = "red", Count = 1 },新帽子 {Id = 3, Name = "Baseball Cap", Color = "blue", Count = 3 }};[HttpGet]公共 IEnumerable<帽子>得到(){返回 MyHats；}

如何关闭驼峰命名法功能，以便 ASP.NET Core 返回属性名称而不更改它们?

解决方案

在 ASP.NET Core <3.0 中，JSON 属性默认为驼峰式(per 本公告).

您可以通过替换来禁用此功能

services.AddMvc();

与

服务.AddMvc().AddJsonOptions(opt => opt.SerializerSettings.ContractResolver= new DefaultContractResolver());

在您的 Startup.cs 文件中.您必须将 using Newtonsoft.Json.Serialization; 添加到文件顶部.

使用 DefaultContractResolver 后，属性名称将在 JSON 输出中逐字表示.不需要 DataMember 属性.

I'm running through a WintellectNOW course on ASP.NET Core/Web API/Angular 2. I have the API portion implemented, but for whatever reason, the JSON that is being returned has the variable names being lowercased.

The returned JSON is formatted like...

[
 {"id":1,"name":"Bowler","color":"black","count":1},
 {"id":2,"name":"Fedora","color":"red","count":1},
 {"id":3,"name":"Baseball Cap","color":"blue","count":3}
]

I'm expecting...

[
 {"Id":1,"Name":"Bowler","Color":"black","Count":1},
 {"Id":2,"Name":"Fedora","Color":"red","Count":1},
 {"Id":3,"Name":"Baseball Cap","Color":"blue","Count":3}
]

Based on the C# model of...

namespace HatCollection.Models
{
    public class Hat
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Color { get; set; }
        public int Count { get; set; }
    }
}

I even went as far as decorating the properties with [DataMember(Name = "Id")] just to make sure and it still didn't matter.

On the off chance, it's relevant the Action and instance variable in the controller...

private static readonly List<Hat> MyHats = new List<Hat>
{
    new Hat {Id = 1, Name = "Bowler", Color = "black", Count = 1 },
    new Hat {Id = 2, Name = "Fedora", Color = "red", Count = 1 },
    new Hat {Id = 3, Name = "Baseball Cap", Color = "blue", Count = 3 }
};

[HttpGet]
public IEnumerable<Hat> Get()
{
    return MyHats;
}

How do I turn off the camelCase functionality, so that ASP.NET Core returns the property names without changing them?

解决方案

In ASP.NET Core <3.0, JSON properties are camelCased by default (per this announcement).

You can disable this by replacing

services.AddMvc();

with

services
    .AddMvc()
    .AddJsonOptions(opt => opt.SerializerSettings.ContractResolver
        = new DefaultContractResolver());

in your Startup.cs file. You'll have to add using Newtonsoft.Json.Serialization; to the top of the file.

With the DefaultContractResolver in place, the property names will be represented verbatim in the JSON output. No need for DataMember attributes.

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