CODEWITHSUNDEEP
c#windows-phone-7json.netdeserialization
Fahim Ahmed
Fahim Ahmed

Reputation: 49

JsonSerializationException in Json Deserializing using Json.NET

I have a Json like this : 

[{"id":"54718","title":"Khaleda to visit China","corres":"Special Correspondent","details":"DHAKA: On a 7-day visit, opposition BNP Chairperson Khaleda Zia will leave Dhaka for China on October 14.","photo":"2012October\/SM\/Khaleda-new-sm20121003132805.jpg"}]

To parse this Json , so far I have done : 

public class Attributes
{
    [JsonProperty("id")]
        public string ID{ get; set; }
        [JsonProperty("title")]
        public string TITLE { get; set; }
        [JsonProperty("corres")]
        public string CORRES { get; set; }
        [JsonProperty("details")]
        public string  DETAIL { get; set; }
        [JsonProperty("photo")]
        public string LINK { get; set; }
}

public class DataJsonAttributeContainer
{
    public List<Attributes> NewsList{ get; set; }
    //public Attributes attributes { get; set; }
}

public static T DeserializeFromJson<T>(string json)
{   //I'm getting the error here     
    T deserializedProduct = JsonConvert.DeserializeObject<T>(json);
    return deserializedProduct;
}

& In my code : 

 void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
    {
        //parse data
            var container = DeserializeFromJson<DataJsonAttributeContainer>(e.Result);

            //load into list
            for (i = 0; i < container.NewsList.Count ; i++)
            {
                newData[i] = new data();
                newData[i].id = container.NewsList[i].ID;
                newData[i].title = container.NewsList[i].TITLE;
                newData[i].price = container.NewsList[i].CORRES;
                newData[i].image = container.NewsList[i].DETAIL;
                newData[i].link = container.NewsList[i].LINK;
            }

The Problem is : container is getting the json from web server which I can see at debugger , but it's shoeing an exception while deserializing . Can anybody help please ? The Exception I'm getting : 

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'BanglaNewsPivot.MainPage+DataJsonAttributeContainer' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.Path '', line 1, position 1.

Upvotes: 1

Views: 3280

Answers (1)

L.B
L.B

Reputation: 116168

Your json is an array (not a single object containing array). Calling your DeserializeFromJson as below

var attrs = DeserializeFromJson<List<Attributes>>(e.Result);

is enough.

--EDIT--

foreach (var attr in attrs)
{
     Console.WriteLine("{0} {1}", attr.ID, attr.TITLE);
}

Upvotes: 5

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