Xamarin adding System.Json

Question

I have been a tutorial to enable web service to fetch data from url. However, in the tutorial, it asks to add System.Json. I have added using System.Json, but it gives me an error.

// Here is the code that I have done in C# and it works very well

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft;
using Newtonsoft.Json;

namespace Weather_App
{
    class Program
    {
        static void Main(string[] args)
        {
            Uri uri = new Uri("http://api.wunderground.com/api/key/conditions/q/CA/Houston.json");
            WebRequest webRequest = WebRequest.Create(uri);
            WebResponse response = webRequest.GetResponse();
            StreamReader stramreader = new StreamReader(response.GetResponseStream());
            String responseData = stramreader.ReadToEnd();


            var outObject = JsonConvert.DeserializeObject<Component.RootObject>(responseData);


            Console.WriteLine(responseData);
            Console.ReadLine();
        }
    }
}

// Here is the code that I would like to implement same functionality in Xamarin, but having difficulty in using system.json

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Xamarin.Forms;
using System.Xml;
using System.Json;

namespace Exercise21
{   
    public partial class MyPage : ContentPage
    {   
        public MyPage ()
        {
            InitializeComponent ();
            CallWebService ();

        }

        private async void CallWebService()
        {

            Uri url = new Uri ("http://api.wunderground.com/api/key/conditions/q/CA/Houston.json");
            var httpReq = (HttpWebRequest)HttpWebRequest.Create (url);
            httpReq.BeginGetResponse ((ar) => {
                var request = (HttpWebRequest)ar.AsyncState;
                using (var response = (HttpWebResponse)request.EndGetResponse (ar)) {                           
                    var s = response.GetResponseStream ();
                    var j = (JsonObject)JsonObject.Load (s);
                    var results = (from result in (JsonArray)j ["results"]
                                   let jResult = result as JsonObject
                                   select jResult ["text"].ToString ()).ToArray ();
                    RunOnUiThread (() => {
                        ListAdapter = new ArrayAdapter<string> (this,
                            Resource.Layout.TweetItemView, results);
                    });
                }
            }, httpReq);

        }
    }
}

enter image description here

Do you have the relevant assembly referenced? The assemblies are a little different in Xamarin than in regular .Net. [This link](http://developer.xamarin.com/guides/android/under_the_hood/assemblies/) might help. — Matt Burland, Oct 07 '14 at 20:04
I'd avise you to use Json.NET instead. It's a library you can find on nuget — Pedro, Oct 07 '14 at 20:05
Also, if your tutorial is online, it might be helpful to include a link to it in your question. Is it actually a Xamarin tutorial? — Matt Burland, Oct 07 '14 at 20:10
@Pedro: I'd agree that Json.NET is a really nice library. But it actually looks like the OP already has it. Notice the `using Newtonsoft.Json;` — Matt Burland, Oct 07 '14 at 20:11
@MihaMarkic, then how would you fetch the data. Example var j = (JsonObject)JsonObject.Load (s); — casillas, Oct 08 '14 at 16:22
It is just that it doesn't look Json.net to me. Can you try something like this instead? [json.net deserialize](http://stackoverflow.com/questions/8157636/can-json-net-serialize-deserialize-to-from-a-stream) — Miha Markic, Oct 08 '14 at 16:37
http://stackoverflow.com/questions/26303074/parsing-data-in-xamarin-forms — casillas, Oct 10 '14 at 15:42

score 1 · Answer 1 · answered Dec 26 '16 at 23:02

1

Right Click on Referenes, then Click Add Refernce. In the Search box type "System.Json". Then click the checkbox beside it.

answered Dec 26 '16 at 23:02

JoAnn Donaldson

21
3

score 0 · Answer 2 · edited Nov 22 '19 at 12:30

0

Correct me if I´m wrong, you need the JsonObjectRequest equivalent for .NET, am I right?

Check the documentation of the library you are using

edited Nov 22 '19 at 12:30

Agilanbu

2,747
2
28
33

answered Nov 22 '19 at 12:03

tkruise

3
7

score -1 · Answer 3 · answered Jan 30 '15 at 06:31

using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
       {
           if (response.StatusCode != HttpStatusCode.OK)
               Console.Out.WriteLine("Error fetching data. Server returned status code: {0}", response.StatusCode);
           using (StreamReader reader = new StreamReader(response.GetResponseStream()))
           {
               var content = reader.ReadToEnd();
               var Results = JsonConvert.DeserializeObject<dynamic>(content);

               if (string.IsNullOrWhiteSpace(content))
               {
                   Console.Out.WriteLine("Response contained empty body...");
               }
               else
               {
                   Console.Out.WriteLine("Response Body: \r\n {0}", content);
               }
           }
       }

can you try Json.Net add reference then try to Using jsonConvert

i hope this is help you

score -1 · Answer 4 · answered Sep 10 '15 at 16:26

-1

Add the JSON.net nuget packages to all of your projects. Then you can call

            string jsonAsString = jsonStream.ReadToEnd();

            RootObject theRoot = Newtonsoft.Json.JsonConvert.DeserializeObject<RootObject>(jsonAsString);

answered Sep 10 '15 at 16:26

MattyMerrix

10,793
5
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Xamarin adding System.Json

4 Answers4