MonoTouch.Dialog Json parsing example

MonoTouch.Dialog.JsonExample.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Json;
using System.Net;
using MonoTouch.Dialog;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace MonoTouch.Dialog.JsonExample
{
	public class Application
	{
		static void Main (string[] args)
		{
			UIApplication.Main (args);
		}
	}

	// The name AppDelegate is referenced in the MainWindow.xib file.
	public partial class AppDelegate : UIApplicationDelegate
	{
		RootElement rootElement;
		
		// This method is invoked when the application has loaded its UI and its ready to run
		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			window.AddSubview (navigationController.View);
			window.MakeKeyAndVisible ();
			
			var root = CreateRoot (GetStackOverflowQuestions ());
			var dv = new DialogViewController (root, true);
			navigationController.PushViewController (dv, true);

			return true;
		}

		// This method is required in iPhoneOS 3.0
		public override void OnActivated (UIApplication application)
		{
		}
		
		RootElement CreateRoot (List<Question> questions) {
			var section = new Section ();
			rootElement = new RootElement ("StackOverflow Questions") { section };
			foreach (var question in questions) {
				var questionRow = new RootElement (question.title);
				foreach (var tag in question.tags) {
					questionRow.Add( new Section (tag));
				}
				section.Add (questionRow);
			}
			return rootElement;
		}
		
		//Don't forget to gzip decompress: http://stackapps.com/questions/907/strange-encoding-for-json-output | http://stackoverflow.com/questions/4567313/uncompressing-gzip-response-from-webclient
		List<Question> GetStackOverflowQuestions () {
			var request = (HttpWebRequest) WebRequest.Create ("http://api.stackoverflow.com/1.1/search?tagged=monotouch");
			request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
			using (var response = (HttpWebResponse) request.GetResponse ()) {
				using (var streamReader = new StreamReader (response.GetResponseStream ())) {
					JsonValue root = JsonValue.Load (streamReader);
					List<Question> questions = ParseJsonAndLoadQuestions ( (JsonObject) root);
					return questions;
				}
			}
		}
		
		public List<Question> ParseJsonAndLoadQuestions (JsonObject json) {
			var questions = new List<Question> ();			
			var questionJson = json["questions"];
			foreach (JsonObject jentry in questionJson) {
				questions.Add(new Question() { 
					question_id = jentry["question_id"].ToString(),
					tags = ParseAndLoadTags ((JsonArray) jentry["tags"] ), 
					title = jentry["title"].ToString() 
				});
			}
			return questions;
		}
		
		public List<string> ParseAndLoadTags (JsonArray json) {
			var tags = new List<string> ();
			foreach (var tag in json) {
				tags.Add (tag);
			}
			return tags;
		}
		
		public class Question {
			public string question_id { get; set; }
			public string title { get; set; }
			public List<string> tags { get; set; }
		}
	}
}