CODEWITHSUNDEEP
c#jsonwindows-phone-7
Jrsahoo
Jrsahoo

Reputation: 41

Converting Object to JSON string in c#,WP7

I am facing problem when am trying to get a JSON string like

[{Key:{key:value,key:value,key:value,key:value}, key: [{key:value,key:value,key:value,key:value}]

in C#.

my class structure is like this

        public class wideeye
    {
        public listing listing { get; set; }
        public listing_images[] listing_images { get; set; }
    }

    public class listing
    {

        public string category { get; set; }
        public string city { get; set; }
        public string country { get; set; }
        public string created_at { get; set; }
        public string current_publish_date { get; set; }
        public string details { get; set; }
        public string id { get; set; }
        public string industry { get; set; }
        public string list_exp_date { get; set; }
        public string list_price { get; set; }
        public string list_start_date { get; set; }
        public string make { get; set; }
        public string model { get; set; }
        public string open_bid { get; set; }
        public string state { get; set; }
        public string status { get; set; }
        public string title { get; set; }
        public string updated_at { get; set; }
        public string year { get; set; }
    }

    public class listing_images
    {
        public string created_at { get; set; }
        public string id { get; set; }
        public string listing_id { get; set; }
        public string listing_image_content_type { get; set; }
        public string listing_image_file_name { get; set; }
        public int listing_image_file_size { get; set; }
        public string listing_image_updated_at { get; set; }
        public string updated_at { get; set; }

    }

}

and the code is

 listing bid1 =
              new listing { category = "electronics", city = "BBSR" };

     listing_images bid2 =
             new listing_images {  created_at = "Instrumentation",  id = "10" };

     List<listing> obid1 = new List<listing>() { bid1};
     List<listing_images> obid2 = new List<listing_images>() { bid2 };

        //DataContractJsonSerializer serializer =  null;

     string sJSON = JsonConvert.SerializeObject(obid1);
     string sJSONw = JsonConvert.SerializeObject(obid2);

Upvotes: 2

Views: 2660

Answers (3)

Shay
Shay

Reputation: 353

enter image description hereI vote for using JSON.net @ http://json.codeplex.com/ Its being adopted by Microsoft and its more efficient that the DataContractJsonSerializer

example of use here : http://james.newtonking.com/projects/json/help/

Performance of Serializers

or if not use the Javascript Serializer

 protected static string JsonSerialize(Object obj)
 {
        var serializer = new System.Web.Script.Serialization.JavaScriptSerializer { MaxJsonLength = int.MaxValue };
        var json = serializer.Serialize(obj);
        return json;
  }

Upvotes: 1

Zilog
Zilog

Reputation: 476

DataContractJsonSerializer class is very handy.

Add references to System.Runtime.Serialization.dll and System.Servicemodel.Web.dll to your project.

using System.Runtime.Serialization.Json;

...
...
...

    MemoryStream stream = new MemoryStream();
    DataContractJsonSerializer sr = new DataContractJsonSerializer(obj.GetType());

    sr.WriteObject(stream, obj);
    stream.Position = 0;

    StreamReader reader = new StreamReader(stream);
    string jsonResult = reader.ReadToEnd();

Of course do proper exceptions handling.

Upvotes: 2

Andy Evans
Andy Evans

Reputation: 7176

Would have left this as a comment but was rather cumbersome:

add a reference to System.Web.MVC to your project and then create the JSON like this:

var jsonOutput = Json(obid1);

This is how I generate JSON in MVC controllers for my AJAX calls. Have not tried it in a Windows mobile app though.

Just a thought.

Upvotes: 0

Related Questions