如何从.Net Core Web API返回Json? [英] How to return a Json from a .Net Core Web API?

问题描述

这是一个基本问题.我是ASP.Net Core的新手，所以我使用Visual Studio 2017中的模板创建了一个.Net Core Web API项目，我想知道如何从Get()函数返回Json字符串.

This is a basic question. I am new to ASP.Net Core so I created a .Net Core Web API project using the template in Visual Studio 2017 and I would like to know how to return a Json string from the Get() function.

提供了Get()函数.

The Get() function provided.

    [HttpGet]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }

我想知道如何更改，以便它返回一个int变量的Json字符串，如下所示.

I would like to know how to change so it returns a Json string of int variable like the following.

    // GET: api/MOER
    [HttpGet]
    public <<some return type>> Get()
    {
        _MOER = 32;

        return <<return a Json result/string of _MOER>>;
    }

我已经看到了Nuget包Newtonsoft.Json，您可以在其中进行序列化/反序列化，但是我不确定它是否适用于.Net Core.

I am have seen the Nuget package Newtonsoft.Json where you serialize/deserialize but I am not sure if its applicable any more with .Net Core.

我也看到了使用JsonResult的示例，但是当我尝试使用这种方法时，编译器不知道Json()是什么.

I have also seen examples where they use JsonResult but when I try to use this approach, the compiler doesn't know what Json() is.

    [HttpGet]
    public JsonResult Get()
    {
        _MOER = 32;

        return Json(_MOER);
    }

谢谢您的帮助！

推荐答案

将此属性添加到控制器类:

Add this attribute to your controller class:

[Produces("application/json")]

它变成:

[Produces("application/json")]
public class YourController: Controller {

   [HttpGet]
   public IEnumerable<string> Get()
   {
       return new string[] { "value1", "value2" };
   }
}

那应该足够了，否则我相信默认值是XML(除非客户端使用Accept HTTP标头明确要求JSON).

That should be enough, otherwise I believe the default is XML (unless the client explicitly asks for JSON using the Accept HTTP header).

这篇关于如何从.Net Core Web API返回Json?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！