将Web服务迁移到.NET Core 2.0并返回json [英] Migrated web service to .NET Core 2.0 and returning json

问题描述

我已经将Web服务迁移到.NET Core 2.0，它可以正常工作，但是我无法获得以json字符串作为响应的问题.

I have migrated my web service to .NET Core 2.0, it works fine but I have problem with getting response as json string.

关于api的方法:

    [HttpGet]
    [ProducesResponseType(typeof(string), 200)]
    [ProducesResponseType(typeof(EntityNotFoundErrorResult), 404)]
    public async Task<IActionResult> GetCurrenciesAsync()
    {
        var result = await service.GetByTypeAsync(ObjectType.Currency.ToString());

        return Ok(result);
    }

返回正确的json作为result:

that is returning proper json as result:

"{\"elements\": [{\"Id\": \"1\", \"Symbol\": \"PLN\"},{\"Id\": \"2\", \"Symbol\": \"SIT\"}]}"

然后在客户端上，我正在使用服务堆栈来获取我的货币作为字符串:

Then on client I'm using service stack to get my currencies as string:

    public virtual IEnumerable<CurrencyData> GetCurrencies()
    {
        string response = null;

        try
        {
            response = api.Get<string>("/Currencies");
        }
        catch (Exception e)
        {
        }

        return string.IsNullOrEmpty(response) ? null :  JsonConvert.DeserializeObject<TempCurrencyClass>(response).elements;
    }

response看起来像这样:

"\"{\\\"elements\\\": [{\\\"Id\\\": \\\"1\\\", \\\"Symbol\\\": \\\"PLN\\\"},{\\\"Id\\\": \\\"2\\\", \\\"Symbol\\\": \\\"SIT\\\"}]}\""

因此JsonConvert.DeserializeObject会引发反序列化异常:

So JsonConvert.DeserializeObject throws deserialization exception:

Newtonsoft.Json.JsonSerializationException

但是当我反序列化对刺痛和目标的回应时，它会起作用:

But it works when I'm deserializing response to sting and to objest then:

var x = JsonConvert.DeserializeObject<string>(response);
var deserialized = JsonConvert.DeserializeObject<TempCurrencyClass>(x).elements;

我猜测问题出在客户身上吗?奇怪的是，它在.NET Core 1.1上正常工作

I'm guessing that the problem is on client right? Well strange thing is that it works just fine on .NET Core 1.1

我缺少什么?

推荐答案

在.NET Core 2.0中，[Produces("application/json")]似乎已更改，并且正在将字符串输出序列化为json，所以我对其进行了序列化两次.此操作系统将[Produces("application/json")]替换为[Produces("text/plain")]，以遍历方法/控制器

Well it appears that in .NET Core 2.0 [Produces("application/json")] has changed and it is serializing string outputs to json so I had it serialized twice... solution for this os to replace [Produces("application/json")] with [Produces("text/plain")] ovet the method / controller

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