How to access Access json body/content (IActionResult)

Question

I have an endpoint that calls another function that returns json object(IActionResult). How do I access the json data?

public async Task<IActionResult> GetData(
            [HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
            ILogger log)
        {
             var empFunc = new employeeFunc(arg);

             var response = await empFunc.GetInfo(req,log);

        return response;

}

If I access the end point via postman.

{
    "message": "Found 2 records.",
    "entries": [
        {"id": "12345",
         "name":"Tony"
        },
        {"id": "123456",
         "name":"David"
        }
    ]

How do I access the json data in my C# code?

I tried something like following

var stream = await response.Content.ReadAsStreamAsync();
JObject object = JObject.Parse(readStreamToString(stream));

But errored out with following error

Error   CS1061  'IActionResult' does not contain a definition for 'Content' and no accessible extension method 'Content' accepting a first argument of type 'IActionResult' could be found (are you missing a using directive or an assembly reference?)    

I also tried with

dynamic jsonResponse = JsonConvert.DeserializeObject<dynamic>(response);

and errors

Error   CS1503  Argument 1: cannot convert from 'Microsoft.AspNetCore.Mvc.IActionResult' to 'string'

Answer 1

You can use HttpClient for API call in C# and access to the data:

HttpClient _httpClient = new HttpClient();
var response = await _httpClient.GetAsync("Your API URL");
response.EnsureSuccessStatusCode();
var jsonResult = await response.Content.ReadAsStringAsync();

Now, you have your JSON in jsonResult . You can simply use Newtonsoft package to convert it to your own data type.

var finalResult = JsonConvert.DeserializeObject<MyOutput>(jsonResult);

public class Entry
{
    public int Id { get; set; }
    public string Name { get; set; }
}

public class MyOutput
{
    public string Message { get; set; }
    public List<Entry> Entries { get; set; }
}

If you are calling the API directly, then you can use this:

var controller = new YourController();
var okResult = await controller.GetInfo(req, log) as OkObjectResult;
var finalResult = okResult.Value as MyOutput;