如何从 Azure 函数返回 JSON [英] How do I return JSON from an Azure Function

问题描述

我正在使用 Azure Functions.但是，我觉得我被一些非常简单的事情难住了.我试图弄清楚如何返回一些基本的 JSON.我不确定如何创建一些 JSON 并将其返回到我的请求中.

I am playing with Azure Functions. However, I feel like I'm stumped on something pretty simple. I'm trying to figure out how to return some basic JSON. I'm not sure how to create some JSON and get it back to my request.

曾几何时，我会创建一个对象，填充其属性并对其进行序列化.所以，我开始走这条路:

Once upon a time, I would create an object, populate its properties, and serialize it. So, I started down this path:

#r "Newtonsoft.Json"

using System.Net;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    log.Info($"Running Function");    
    try {      
      log.Info($"Function ran");

      var myJSON = GetJson();

      // I want myJSON to look like:
      // {
      //   firstName:'John',
      //   lastName: 'Doe',
      //   orders: [
      //     { id:1, description:'...' },
      //     ...
      //   ]
      // }
      return ?;
    } catch (Exception ex) {
        // TODO: Return/log exception
        return null;
    }
}

public static ? GetJson() 
{
  var person = new Person();
  person.FirstName = "John";
  person.LastName = "Doe";

  person.Orders = new List<Order>();
  person.Orders.Add(new Order() { Id=1, Description="..." });

  ?
}

public class Person 
{
  public string FirstName { get; set; }
  public string LastName { get; set; }
  public List<Order> Orders { get; set; }
}

public class Order
{
  public int Id { get; set; }
  public string Description { get; set; }
}

但是，我现在完全停留在序列化和返回过程上.我想我习惯于在 ASP.NET MVC 中返回 JSON，其中一切都是一个动作

However, I'm totally stuck on the serialization and return process now.I guess I'm used to returning JSON in ASP.NET MVC where everything is an Action

推荐答案

这是一个 Azure 函数返回格式正确的 JSON 对象而不是 XML 的完整示例:

Here's a full example of an Azure function returning a properly formatted JSON object instead of XML:

#r "Newtonsoft.Json"
using System.Net;
using Newtonsoft.Json;
using System.Text;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    var myObj = new {name = "thomas", location = "Denver"};
    var jsonToReturn = JsonConvert.SerializeObject(myObj);

    return new HttpResponseMessage(HttpStatusCode.OK) {
        Content = new StringContent(jsonToReturn, Encoding.UTF8, "application/json")
    };
}

在浏览器中导航到端点，您将看到:

Navigate to the endpoint in a browser and you will see:

{
  "name": "thomas",
  "location": "Denver"
}

这篇关于如何从 Azure 函数返回 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！