C# 任务<iactionresult>返回 Json</iactionresult>

Question

I am writing my first Azure FunctionApp, and I am looking to return a valid JSON Object from a deserialized class that was created from a Faker JSON object as shown below:

Class：

public class TestData
{
    //based on faker API 
    public int userId { get; set; }
    public int id { get; set; }
    public string title { get; set; }
    public bool completed { get; set; }
}

Function App 入口点和返回码：

public static Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,ExecutionContext context, ILogger log)
{
    var configBuilder = new ConfigurationBuilder()
        .SetBasePath(context.FunctionAppDirectory)
        .AddJsonFile("local.settings.json", optional: true, reloadOnChange: true)
        .AddEnvironmentVariables();

    var config = configBuilder.Build();
    log.LogInformation("Config Loaded");

    // for later use when i get past the current issue
    var settings = new AppSettings();
    config.Bind("AppSettings", settings);
    
    //Setting this seems to be the route cause, but need to respond correctly?
    req.HttpContext.Response.Headers.Add("Content-Type", "application/json");
    var worker = new WorkerClass();
    var results = worker.DoSomeWork();
    return Task.FromResult(results);
    //Also Tried:
    //return Task.FromResult<IActionResult>(new OkObjectResult(results));
}

测试 Worker Class 用于返回的 object 数据和 JSON 序列化：

public class WorkerClass
{
   public IActionResult DoSomeWork()
    {
        try
        {
            var testdata = new TestData
            {
                userId = 123,
                id = 1,
                title = "delectus aut autem",
                completed = true
            };
            //formatted as Json correctly
            var results = JsonConvert.SerializeObject(testdata, Formatting.Indented);
            return new OkObjectResult(results);
        }
        catch (Exception dswEx)
        {
            return new BadRequestObjectResult($"\{ERROR: {dswEx.Message}\}");
        }
    } 
}

我已经尝试了几种方法来尝试使用响应 object 类型来达到一个干净的 JSON output 类型，因为最好添加基于 ObjectResults 的逻辑，但我错过了明显的怀疑线，

如果返回设置为： return Task.FromResult(results); 响应是转义的 JSON output：

"{\"userId\": 1,\"id\": 1,\"title\": \"delectus aut autem\",\"completed\": false}"

如果返回修改为： return Task.FromResult<IActionResult>(new OkObjectResult(results)); 然后响应被转义但封装在 Object 包装器中：

{
    "value": "{\r\n \"userId\": 1,\"id\": 1,\"title\": \"delectus aut autem\",\"completed\": false}",
    "formatters": [],
    "contentTypes": [],
    "declaredType": null,
    "statusCode": 200
}

我想要实现的只是将正确的响应 header 作为 application/json 和结果集如下所示：

{
  "userId": 1,
  "id": 1,
  "title": "delectus aut autem",
  "completed": false
}

提前致谢。

Answer 1

您想返回new JsonResult(data) ，其中data是您的托管结构（不是像您出于某种奇怪的原因那样序列化的 json 数据）。

Answer 2

您不需要将 object 序列化为 json，Net 会为您完成。

return Ok(testdata);