Error when deserialize JSON in C#

Question

I try de-serialize using method with JavaScriptSerializer but it doesnt work. Not sure what is diffrent between my code and this example.

public void Main()
            {
              var dataResponse =@"{\"access_token\": \"NAonCg8KBHBpYXMSABoAJRAluFUSFAD2I2fXOrgvxInfWWG0UUsoqsby\", \"expires_in\": 28800}"

              JSON elements = new JavaScriptSerializer().Deserialize<JSON>(dataResponse);

              foreach (var item in elements.data) 
              {
                 MessageBox.Show(item.access_token.ToString());
              }

            } 
        public class JSON
            {
                public List<JSONElements> data { get; set; }
            } 
        public class JSONElements
            {
                public string access_token { get; set; }
                public int expired_in { get; set; }
            }

try using this. var dataResponse =@"{data: [{'access_token': 'NAonCg8KBHBpYXMSABoAJRAluFUSFAD2I2fXOrgvxInfWWG0UUsoqsby', 'expired_in': 28800}]}" also would be better if you use JsonConvert.DeserializeObject<>() — Nilesh
– Nilesh, Commented Jul 29, 2015 at 9:55

Alex Neves · Accepted Answer · 2015-07-29 10:00:24Z

2

First:

Your json string doesn't match properties in JSONElements class.The int member name is different.

Second:

Use JSON.Net while working with json.And you're deserializing to a Wrong type. Your json string doesn't contain any property data.It is an JSONElements object instead.

Third:

If you use the @ symbol with a string then you cannot escape characters

So try like:

    var dataResponse =@"{'access_token':'NAonCg8KBHBpYXMSABoAJRAluFUSFAD2I2fXOrgvxInfWWG0UUsoqsby','expires_in':28800}";    
    var data = JsonConvert.DeserializeObject<JSONElements>(dataResponse);

And it works.

edited Jul 29, 2015 at 10:00

Alex Neves

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answered Jul 29, 2015 at 9:50

Amit Kumar Ghosh

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2 Comments

Jakub Over a year ago

thank you for help and points i will correct it. But I cannot use JSON.NET.

Amit Kumar Ghosh Over a year ago

You can use anything for this task, while JSON.Net is most popular and preferred way. Also, if you find the answer helpful, mark it as an answer.

Piotr Pasieka · Accepted Answer · 2015-07-29 09:49:08Z

0

Check string encoding. Maybe something like this will work

var dataResponse =@"{""access_token"": ""NAonCg8KBHBpYXMSABoAJRAluFUSFAD2I2fXOrgvxInfWWG0UUsoqsby"", ""expires_in"": ""28800""}";

answered Jul 29, 2015 at 9:49

Piotr Pasieka

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