JsonConverter DeserializeObject Single or Multiple to Generic class

Question

I want to deserialize to my json string to my generic class. But i want to do this in one method. When i call this link;

Here is my Code; Its My class:

public class Test
{
    public string userId { get; set; }

    public string Id { get; set; }
}

Its My Deserialize class:

    private static async Task<IRestResponse<T>> MapResponse<T>(HttpResponseMessage response) where T : class
    {
        var restResponse = new WebApiRestResponse<T>
        {
            Content = await response.Content.ReadAsStringAsync(),
            StatusCode = response.StatusCode
        };
        try
        {
            var body = await response.Content.ReadAsStringAsync();
            if (response.Content.Headers.ContentType.MediaType == "text/plain")
                restResponse.Exception = new RestInteractionException(body);
            else
                restResponse.Data = JsonConvert.DeserializeObject<List<T>>(body); ;
        }
        catch (Exception e)
        {
            restResponse.Exception = e;
        }

        return restResponse;
    }


 public interface IRestResponse
    {

        string Content { get; }


        Exception Exception { get; set; }

        HttpStatusCode StatusCode { get; }
    }

    public interface IRestResponse<T> : IRestResponse
    {
        List<T> Data { get; }

    }

https://jsonplaceholder.typicode.com/posts/1

Its returned to single object.

when i call this link;

https://jsonplaceholder.typicode.com/posts

MapResponse class make to deserialize to json to generic class. But sometimes i call single object, sometimes i call list object. so how can i do this in this code?

Best regards

You need to write the code that implements the logic you are describing. Alternatively, you could provide sample code that you have tried and people may give you a hand here. — Vidmantas Blazevicius, Mar 19 '18 at 08:34
It is impossible to understand your problem without posting your code. On SO, people take their free time to help you out of a problem. It's not asking too much that you take the time to adequately describe your problem. — Sefe, Mar 19 '18 at 08:34
Possibly a duplicate of [How to handle both a single item and an array for the same property using JSON.net](https://stackoverflow.com/q/18994685/3744182) — dbc, Mar 19 '18 at 08:43
I did it. But its return stack overflow error. When you try single object it says to you System.Collections.Generic.List`1[Item]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly. https://dotnetfiddle.net/SgM0LY — user1436795, Mar 19 '18 at 08:45
@user1436795 - you would need to use `SingleOrArrayConverter` where `Item` is the root object that might or might not be in an array. See https://dotnetfiddle.net/GJMaYi. Or `SingleOrArrayConverter` for your `Test` class. — dbc, Mar 19 '18 at 08:50
Thanks Alot of. Its working so good.Have a nice day. You should write answer here and i will check it :) — user1436795, Mar 19 '18 at 08:57

score 2 · Accepted Answer · answered Mar 19 '18 at 08:39

2

Since you can have list as result sometimes, return it as a list always if you want single method. When you have a single object, just create new list and add it.

answered Mar 19 '18 at 08:39

Roman

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I share my code. But i cant understand when its single, when its list. How can i understand it? can you tell me. I can return list in every condition. – user1436795 Mar 19 '18 at 08:43

JsonConverter DeserializeObject Single or Multiple to Generic class

1 Answers1