Deserialize nested json

Question

Deeserializing json in ASP.NET 5 MVC application using

var tulemus = JsonSerializer.Deserialize<EstoJarelMaksTulemnus>(apiResponse, new JsonSerializerOptions { PropertyNameCaseInsensitive = true });


    public class EstoJarelMaksTulemnus
    {
        public string[] Errors { get; set; }
        public EstoData Data { get; set; }
        public string Mac { get; set; }
    }

    public class EstoData
    {
        public string Id { get; set; }
        public string Status { get; set; }
        public string Purchase_url { get; set; }
        public string Merchant_reference { get; set; }
        public decimal Amount { get; set; }
        public string Currency { get; set; }
        public bool Is_test { get; set; }
        public string Return_url { get; set; }
        public string Notification_url { get; set; }
    }

throws error

System.Text.Json.JsonException: The JSON value could not be converted
to Store.Controllers.CheckoutController+EstoData. Path: $.data |
LineNumber: 0 | BytePositionInLine: 497. at
System.Text.Json.ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(Type
propertyType) ...

apiResponse contains single line string:

{"errors":[],"data":"{\"id\":\"iUW3YiDIz5Ahg5eO8hV7d3Cv7SVbZ913\",\"status\":\"CREATED\",\"purchase_url\":\"https:\\\/\\\/user.esto.ee\\\/application\\\/iUW3YiDIz5Ahg5eO8hV7d3Cv7SVbZ913\",\"merchant_reference\":\"158502\",\"amount\":93.95,\"currency\":\"EUR\",\"is_test\":true,\"return_url\":\"http:\\\/\\\/localhost:54274\\\/CheckoutController\\\/EstoJarelmaksOK?tellimus=104742\",\"notification_url\":\"http:\\\/\\\/localhost:54274\\\/CheckoutController\\\/EstoJarelmaksTeade?tellimus=104742\"}","mac":"E9C3E61FC347D80200F542C43ABDCF464D537C37A609EC878F95B5F526271A2287F2D2E507B5A14FA3AF5F7A6D4CDECB6E8A1DBDF9A5633E0B3AD96DA35FA1C9"}

postion 497 seems pointt to end of Data property before "mac" property.

How to deserialize this json ?

Answer 1

It looks like you are dealing with a generic response object which you must deserialize first. Then you can deserialize data string.

    class Program
    {
        static async Task Main(string[] args)
        {
            byte[] fileContents = await File.ReadAllBytesAsync("json1.json");
            EstoJarelMaksTulemnus response = JsonSerializer.Deserialize<EstoJarelMaksTulemnus>(fileContents);

            EstoData data = JsonSerializer.Deserialize<EstoData>(response.data);
            Console.WriteLine($"Id: {data.id}");
        }
    }
    public class EstoJarelMaksTulemnus
    {
        public object[] errors { get; set; }
        public string data { get; set; }
        public string mac { get; set; }
    }
    public class EstoData
    {
        public string id { get; set; }
        public string status { get; set; }
        public string purchase_url { get; set; }
        public string merchant_reference { get; set; }
        public float amount { get; set; }
        public string currency { get; set; }
        public bool is_test { get; set; }
        public string return_url { get; set; }
        public string notification_url { get; set; }
    }