Question

the json file’s structure which I will deserialize looks like below;

{
    "id" : "1lad07",
    "text" : "test",
    "url" : "http:\/\/twitpic.com\/1lacuz",
    "width" : 220,
    "height" : 84,
    "size" : 8722,
    "type" : "png",
    "timestamp" : "Wed, 05 May 2010 16:11:48 +0000",
    "user" : {
        "id" : 12345,
        "screen_name" : "twitpicuser"
    }
}

I have created a class which has the filed names as properties for JavaScriptSerializer. The code which I will use to Deserialize the json is as follows;

            using (var reader = new StreamReader(twitpicResponse.GetResponseStream())) {


                var responseBody = reader.ReadToEnd();
                var deserializer = new JavaScriptSerializer();
                var results = deserializer.Deserialize<Response>(responseBody);

            }

My problem is how I can read the user field on json file. which is like below;

"user" : {
    "id" : 12345,
    "screen_name" : "twitpicuser"
}

it has sub properties and values. how can I name them on my Response class. my response class now look like this;

public class Response {

    public string id { get; set; }
    public string text { get; set; }
    public string url { get; set; }
    public string width { get; set; }
    public string height { get; set; }
    public string size { get; set; }
    public string type { get; set; }
    public string timestamp { get; set; }

}

what is the best case to do it?

Answer 1

1. You need to create a class that holds the user values, just like the response class User.

2. Add a property to the Response class ‘user’ with the type of the new class for the user values User.

   public class Response {
   
       public string id { get; set; }
       public string text { get; set; }
       public string url { get; set; }
       public string width { get; set; }
       public string height { get; set; }
       public string size { get; set; }
       public string type { get; set; }
       public string timestamp { get; set; }
       public User user { get; set; }
   
   }
   
   public class User {
   
       public int id { get; set; }
       public string screen_name { get; set; }
   
   }
   

In general you should make sure the property types of the json and your CLR classes match up. It seems that the structure that you’re trying to deserialize contains multiple number values (most likely int). I’m not sure if the JavaScriptSerializer is able to deserialize numbers into string fields automatically, but you should try to match your CLR type as close to the actual data as possible anyway.