Asp Net核心MVC控制器中的对象反序列化失败

Question

我创建了一个API应用程序，没有完整的MVC模板。但是，带有正文的POST请求总是由于内部服务器错误而失败。

protected override IEnumerable<ServiceReplicaListener> CreateServiceReplicaListeners()
{
    return new ServiceReplicaListener[]
    {
        new ServiceReplicaListener(serviceContext =>
            new KestrelCommunicationListener(serviceContext, (url, listener) =>
                new WebHostBuilder()
                    .UseKestrel()
                    .ConfigureServices(
                         services => services
                             .AddSingleton<StatefulServiceContext>(serviceContext)
                             .AddSingleton<IReliableStateManager>(this.StateManager))
                    .UseContentRoot(Directory.GetCurrentDirectory())
                    .UseServiceFabricIntegration(listener, ServiceFabricIntegrationOptions.UseUniqueServiceUrl)
                    .UseStartup<Startup>()
                    .UseUrls(url)
                    .Build()
            ))
    };
}

[Route("[controller]")]
[ApiController]
public class MyController : ControllerBase
{

    [HttpGet("Read1")]
    public async Task<ActionResult<string>> Read1()
    {
        return "asd";
    }
    [HttpPost("Read2")]
    public async Task<ActionResult<string>> Read2()
    {
        return "asd";
    }
    [HttpPost("Read3")]
    public async Task<ActionResult<MyOutput>> Read([FromBody]MyInput input)
    {
       
        var a = new MyOutput();
        a.Value= "asdasd";
        return a;
        
    }
}

using System.Runtime.Serialization;
[DataContract]
public class MyInput
{

    [DataMember]
    public string Value{ get; }

    public MyInput(string val)
    {
        Value= val;
    }
}

{
    "Value": "cat"
}

可能是什么原因造成的？

Answer 1

在我的例子中，我缺少json格式化程序：

services.AddMvcCore().AddJsonFormatters();

也许能帮上什么忙。