CODEWITHSUNDEEP
c#json
user2465036
user2465036

Reputation: 351

How to deserialize json data coming from web api directly

I am trying to deserialize JSON data coming from Web Api directly .But it is throwinn error:

Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[TestMvc.Controllers.HomeController+TestJson]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.

My code:

  public class TestJson
    {
        public string thing1
        {
            get;
            set;
        }

        public string thing2
        {
            get;
            set;
        }
    }

  using (WebClient wc = new WebClient())
        {
            var json = wc.DownloadString("http://localhost:43560/api/carvalues");

           List <TestJson> exam = new List<TestJson>();

           exam = JsonConvert.DeserializeObject<List<TestJson>>(json);

        }

Sample of json data

{"thing1":"first thing","thing2":"second thing"}

My objective is how can I deserialize the data coming from WebAPI directly. I am using Newtonsoft.Json to deserialize.

Upvotes: 2

Views: 5025

Answers (3)

Sandip Bantawa
Sandip Bantawa

Reputation: 2880

Your JSON data needs to be on array, something like this

"data": [{
    "thing1": "first thing",
    "thing2": "second thing"
}, {
    "thing1": "first thing",
    "thing2": "second thing"
}, {
    "thing1": "first thing",
    "thing2": "second thing"
}]

Or use plain class i.e. particular to this case

exam = JsonConvert.DeserializeObject<TestJson>(json);

Upvotes: 0

Roman Marusyk
Roman Marusyk

Reputation: 24569

In that case use it without list

var exam = new TestJson();    
exam = JsonConvert.DeserializeObject<TestJson>(json);

Upvotes: 2

Sujit Singh
Sujit Singh

Reputation: 829

Example json data indicates it is just one object coming back in the response where you are expecting array/list of the objects.

Modify the webapi to return list instead of single object and it should fix the issue.

Upvotes: 1

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