Initial import

1 files changed, 129 insertions, 0 deletions

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1545.xaml.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1545.xaml.cs
new file mode 100644
index 00000000..b00ced62
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue1545.xaml.cs
@@ -0,0 +1,129 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms.CustomAttributes;
+
+namespace Xamarin.Forms.Controls
+{
+#if APP
+	[Preserve (AllMembers = true)]
+	[Issue (IssueTracker.Github, 1545, "Binding instances cannot be reused", PlatformAffected.Android | PlatformAffected.iOS | PlatformAffected.WinPhone)]
+	public partial class Issue1545 : ContentPage
+	{
+		ArtistsViewModel _viewModel;
+		public Issue1545()
+		{
+			InitializeComponent();
+			BindingContext = _viewModel = new ArtistsViewModel();
+		}
+
+		protected override void OnAppearing()
+		{
+		  base.OnAppearing();
+		  if (_viewModel.IsInitialized)
+			return;
+
+		  _viewModel.IsInitialized = true;
+		  _viewModel.LoadCommand.Execute(null);
+		}
+	}
+
+	public class BaseViewModel : INotifyPropertyChanged
+	{
+		public string Title { get; set; }
+		public bool IsInitialized { get; set; }
+
+		bool _isBusy;
+
+		/// <summary>
+		/// Gets or sets if VM is busy working
+		/// </summary>
+		public bool IsBusy
+		{
+			get { return _isBusy; }
+			set { _isBusy = value; OnPropertyChanged("IsBusy"); }
+		}
+
+		//INotifyPropertyChanged Implementation
+		public event PropertyChangedEventHandler PropertyChanged;
+
+		protected void OnPropertyChanged(string propertyName)
+		{
+			if (PropertyChanged == null)
+			return;
+
+			PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+		}
+	}
+
+	public class ArtistsViewModel : BaseViewModel
+	{
+		public ArtistsViewModel()
+		{
+			Title = "Artists";
+			Artists = new ObservableCollection<Artist>();
+		}
+
+		/// <summary>
+		/// gets or sets the feed items
+		/// </summary>
+		public ObservableCollection<Artist> Artists
+		{
+			get;
+			private set;
+		}
+
+		Command _loadCommand;
+		/// <summary>
+		/// Command to load/refresh artitists
+		/// </summary>
+		public Command LoadCommand
+		{
+			get { return _loadCommand ?? (_loadCommand = new Command(async () => await ExecuteLoadCommand())); }
+		}
+
+		static readonly Artist[] ArtistsToLoad = new Artist[] {
+			new Artist { Name = "Metallica", ListenerCount = "100", PlayCount = "5000" },
+			new Artist { Name = "Epica", ListenerCount = "50", PlayCount = "1000" }
+		};
+
+		async Task ExecuteLoadCommand()
+		{
+			if (IsBusy)
+				return;
+
+			IsBusy = true;
+
+			Artists.Clear();
+
+			await Task.Delay (3000);
+
+			foreach (Artist a in ArtistsToLoad)
+				Artists.Add (a);
+
+			IsBusy = false;
+		}
+	}
+
+	public class Artist
+	{
+
+		public string Name { get; set; }
+
+		public string PlayCount { get; set; }
+
+		public string ListenerCount { get; set; }
+
+		public string Mbid { get; set; }
+
+		public string Url { get; set; }
+
+		public string Streamable { get; set; }
+	}
+#endif
+}