ListTasksPage.xaml.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Linq;
using MyDailyTaskManger.Models;
using Newtonsoft.Json;

using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace MyDailyTaskManger
{
   
    public partial class ListTasksPage : ContentPage
    {
        List<Task> listOfTasks;
        public ObservableCollection<Task> Tasks { get; set; }

        public ListTasksPage()
        {
            this.Tasks = new ObservableCollection<Task>();
            this.BindingContext = this.Tasks;
            InitializeComponent();
            this.listOfTasks = new List<Task>();
           
            LoadAllFilesAndDeserialize();
           
        }

        private void LoadAllFilesAndDeserialize()
        {
            var files = Directory.EnumerateFiles(App.FolderPath, "*.task.txt");

            if (files.Count() > 0)
            {
                foreach (var filename in files)
                {
                    String name = filename;
                    String serializedText = File.ReadAllText(filename);
                    Task deSerializedTask = JsonConvert.DeserializeObject<Task>(serializedText);
                    if (null == deSerializedTask.fileName)
                    {
                        deSerializedTask.fileName = filename;
                    }
                    listOfTasks.Add(deSerializedTask);
                    this.Tasks.Add(deSerializedTask);
                }

                this.listView.ItemsSource = this.listOfTasks.OrderBy(d => d.dateCreated).ToList();
            }
            
        }

        public void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
        {
           // int pos = e.SelectedItemIndex;
            Task taskSelected = (Task) e.SelectedItem;
            ViewTaskPage viewTaskPage = new ViewTaskPage(taskSelected);
            Navigation.PushAsync(viewTaskPage);
        }

    }
}