Building a 3-Tier App with Silverlight 3, .NET RIA Services, and Azure Table Storage

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Hanray.Azurelight.Model;
using Hanray.Azurelight.Views;
using Hanray.Azurelight.Service;
using System.Windows.Ria.Data;

//DataService.axd/Hanray-Azurelight-Service-SurveyService/LoadSurveys

namespace Hanray.Azurelight.Command
{
	public class LoadFeedback : FeedbackCmdBase
	{
		private EventHandler CompletedEventHandler;
		private LoadOperation<Survey> loadOp;

		public LoadFeedback()
		{
			CompletedEventHandler = new EventHandler(this.onLoadCompleted);
			loadOp = null;
		}
		
		#region ICommand Members

		public override void execute(SilverlightCairngorm.Control.CairngormEvent cairngormEvent)
		{
			LoadSurveys();
		}

		#endregion

		private void LoadSurveys()
		{
			onLoadStart();

			EntityQuery<Survey> allSurveysQuery = riaSvc.GetSurveysQuery();
			loadOp = riaSvc.Load(allSurveysQuery);
			loadOp.Completed += CompletedEventHandler;
		}

		private void onLoadStart()
		{
			_progressDialog = new ProgressDialog("Loading...");
			_progressDialog.Show();
		}

		private void onLoadCompleted(object sender, EventArgs e)
		{
			loadOp.Completed -= CompletedEventHandler;

			model.surveyLoaded = true;
			_progressDialog.Close();

			errorHandler(loadOp.Error);
		}


	}
}