CODEWITHSUNDEEP
c#jsonxamarin
user9090742
user9090742

Reputation:

Xamarin Newtonsoft.Json.JsonSerializationException:

I have a problem whit deserialize Json Object:

Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[xxx.Models.FollowerResponseModel]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly. To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object. Path 'users', line 2, position 10.

{"result":{"status":200,"response":{"data":{"users":[
{"uin":223,"login":"tttttt","uin_follows":true,"follow_of_uin":false,"blocked":false},
{"uin":225,"login":"hggjhjj","uin_follows":false,"follow_of_uin":true,"blocked":true},
{"uin":226,"login":"testestefy","uin_follows":false,"follow_of_uin":false,"blocked":true}
],"version":"1"}}}}

My FollowersResponModel 

public class FollowerResponseModel
{
    [JsonProperty("users")]
    public List<UserFollowersModel> Users { get; set; }

    [JsonProperty("version")]
    public int Version { get; set; }
}

public class UserFollowersModel
{
    [JsonProperty("uin")]
    public int Uin { get; set; }

    [JsonProperty("login")]
    public string Login { get; set; }

    [JsonProperty("uin_follows")]
    public bool UinFollows { get; set; }

    [JsonProperty("follow_of_uin")]
    public bool FollowOfUin { get; set; }

    [JsonProperty("blocked")]
    public bool Blocked { get; set; }
}

How should my FollowersModel class look like?

My method GetFollowers...

public async Task<List<FollowerModel>> GetFollowersBlockedList(int version)
{
    var request = CreateHttpRequest(string.Format(FOLLOWERS_BLOCKED_URL), HttpMethod.Get, true);

    var response = await CallRequestAsync(request, HttpContentType.ApplicationJson);

    if (response == null) return null;

    var stream = await response.Content.ReadAsStreamAsync();
    var content = Tools.ConvertStreamToString(stream);

    if (string.IsNullOrEmpty(content)) return null;

    var responseModel = JsonConvert.DeserializeObject<ResponseModel>(content);

    if (response.IsSuccessStatusCode)
    {
        _log.MessageInDebug("OK");

        var data = responseModel.Result.Response.Data.ToString();

        var list = JsonConvert.DeserializeObject<List<FollowerResponseModel>>(data);

        if (list == null || list.Count() == 0) return null;

        return list.Select(x => new FollowerModel(x)).ToList();
    }

    return null;
}

Upvotes: 0

Views: 470

Answers (1)

Jason
Jason

Reputation: 89092

FollowerResponseModel already contains a List<User>, so you do not need to deserialize a List<FollowerResponseModel>

var follow = JsonConvert.DeserializeObject<FollowerResponseModel>(data);

if (follow.Users == null || follow.Users.Count() == 0) return null;

Upvotes: 2

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