C# 任務<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 入口點和返回碼：

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));
}

測試 Worker Class 用於返回的 object 數據和 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}\}");
        }
    } 
}

我已經嘗試了幾種方法來嘗試使用響應 object 類型來達到一個干凈的 JSON output 類型，因為最好添加基於 ObjectResults 的邏輯，但我錯過了明顯的懷疑線，

如果返回設置為： return Task.FromResult(results); 響應是轉義的 JSON output：

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

如果返回修改為： return Task.FromResult<IActionResult>(new OkObjectResult(results)); 然后響應被轉義但封裝在 Object 包裝器中：

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

我想要實現的只是將正確的響應 header 作為 application/json 和結果集如下所示：

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

提前致謝。

Answer 1

您想返回new JsonResult(data) ，其中data是您的托管結構（不是像您出於某種奇怪的原因那樣序列化的 json 數據）。

Answer 2

您不需要將 object 序列化為 json，Net 會為您完成。

return Ok(testdata);