dotnet core 3.0 不支持 DataMember 属性 [英] DataMember Attribute is not honored in dotnet core 3.0

问题描述

我创建了一个示例 dotnet core 3.0 Web API 项目并进行了以下更改，

I created a sample dotnet core 3.0 Web API project and did the following changes,

1. 创建模型类 TestData

using System.Runtime.Serialization;
namespace WebApplication17.Models
{
    [DataContract]
    public class TestData
    {
        [DataMember(Name = "testaction")]
        public string Action { get; set; }
    }
}

然后我在控制器 WeatherForecastController 中进行了更改，以添加一个 post 端点

Then I made changes in controller WeatherForecastController, to add a post endpoint

[HttpPost("package/{packageName}/version/{version}")]
public void Post(string packageName, string version, [FromBody] TestData activityPayload)
{
    Console.WriteLine(activityPayload.Action);
}

现在我打电话给邮递员或用身体卷曲

Now I made a call from postman or curl with body

{   
    "testaction": "action"  
}

仍然在WeatherForecastController的Post方法中，activityPayload.Action为null.

我期待它是行动"

推荐答案

Asp.Net Core 3 默认不支持[DataContract]、[DataMember]基于这个 Github 问题，他们看起来不会很快添加它

Asp.Net Core 3 does not support [DataContract], [DataMember] by default and it does not look like they would be adding it any time soon based on this Github Issue

如果您想切换回使用 Newtonsoft.Json 的先前默认设置，它确实支持这些属性，那么您必须执行以下操作:

If you’d like to switch back to the previous default of using Newtonsoft.Json, which does honor those attributes, then you'll have to do the following:

1. 安装 Microsoft.AspNetCore.Mvc.NewtonsoftJsonNuGet 包.

在 ConfigureServices() 中添加对 AddNewtonsoftJson()

public void ConfigureServices(IServiceCollection services) {
    //...

    services.AddControllers()
        .AddNewtonsoftJson(); //<--

    //...
}

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