Deserialize json java object in C#

Question

I am trying to de-serialize a Java Json object in c# using Json Serializer, the same objects I have in Java exist in C#, but i get the following error:

{Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[Dynamic4ClientConsumer.Attributes.SurveyResponseAttributes]' 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<T>) 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.

here is my Json object:

{
"@type":"concep.selenium.Dynamic.Attributes.SurveyAttributes","surveyType":"1451567316Feedback FormNokia 925 Launch","surveyID":null,"campaignType":"Nokia 925 Launch","surveyStatus":null,"SurveyResponse":
  {"@type":"java.util.ArrayList"},
  "CampaignResponseAttribute":{"@type":"java.util.ArrayList"},
  "questions":{"@type":"java.util.ArrayList","@items":[{"@type":"concep.selenium.Dynamic.Attributes.QuestionsAttributes","question":"Whats your Martial Status?"},
  {"@type":"concep.selenium.Dynamic.Attributes.QuestionsAttributes","question":"Whats your Email?"},
  {"@type":"concep.selenium.Dynamic.Attributes.QuestionsAttributes","question":"Whats your Last Name?"}]},
  "answerses":{"@type":"java.util.ArrayList","@items":[{"@type":"concep.selenium.Dynamic.Attributes.AnswersAttributes","Answer":"Single"},
  {"@type":"concep.selenium.Dynamic.Attributes.AnswersAttributes","Answer":"[email protected]"},
  {"@type":"concep.selenium.Dynamic.Attributes.AnswersAttributes","Answer":"1451567316lastName"}]}
  }

and here is my object:

  public class SurveyAttributes
{
    public SurveyAttributes()
    {
        SurveyResponse = new List<SurveyResponseAttributes>();
        CampaignResponseAttribute = new List<CampaignResponseAttribute>();
        Answerses = new List<AnswersAttributes>();
        Questions = new List<QuestionsAttributes>();
    }

    public string SurveyType { get; set; }
    public string SurveyId { get; set; }
    public string CampaignType { get; set; }
    public string SurveyStatus { get; set; }
    public List<SurveyResponseAttributes> SurveyResponse { get; set; }
    public List<CampaignResponseAttribute> CampaignResponseAttribute { get; set; }
    public List<QuestionsAttributes> Questions { get; set; }
    public List<AnswersAttributes> Answerses{ get; set; }


}

I suspect that the problem is the list declaration in Java(ArrayList). any suggestion please.

zaitsman · Accepted Answer · 2016-01-02 11:18:15Z

1

Try this:

  public class SurveyAttributes
{
    public SurveyAttributes()
    {
        SurveyResponse = new List<SurveyResponseAttributes>();
        CampaignResponseAttribute = new List<CampaignResponseAttribute>();
        Answerses = new List<AnswersAttributes>();
        Questions = new List<QuestionsAttributes>();
    }

    public string SurveyType { get; set; }
    public string SurveyId { get; set; }
    public string CampaignType { get; set; }
    public string SurveyStatus { get; set; }
    public Questions Questions { get; set; }
}

public class Questions
{
  [JsonProperty(PropertyName = "@items")]
  public List<Question> Questions {get;set;}
}

public class Question
{
  public string Question { get; set; }
}

var result = JsonConvert.DeserializeObject<SurveyAttributes>("// your data here");

answered Jan 2, 2016 at 11:18

zaitsman

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Comments

Ali Hamadi · Accepted Answer · 2016-01-06 11:10:45Z

0

I fixed the problem but changing the lib that I was using for serializing my Json object in Java, I was using Json.io which it includes all these unnecessary classes name and annotation. and now I am google.Gson, and it works like a charm!!

answered Jan 6, 2016 at 11:10

Ali Hamadi

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