private void ReloadData ()
{
mAlert = new UIAlertView ("Downloading...", "", null, null, null);
mAlert.Show ();
// Show the user that data is about to be downloaded
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = true;
using (var downloader = new GzipWebClient ())
{
downloader.DownloadStringCompleted += DownloadCompleted;
downloader.DownloadStringAsync (RssFeedUrl);
}
}
private void DownloadCompleted (object sender, DownloadStringCompletedEventArgs e)
{
UIApplication.SharedApplication.BeginInvokeOnMainThread (() => {
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
mAlert.DismissWithClickedButtonIndex (0, true);
if (e.Error != null)
{
DisplayError ("Warning", "The rss feed could not be downloaded: " + e.Error.Message);
}
else
{
try
{
//clear the selected items
this.GridView.ClearSelectedItems();
//Clear the rows
mDatasource.ClearRows();
mDatasource.Apps.Clear ();
foreach (var v in RssParser.Parse (e.Result))
mDatasource.Apps.Add (v);
mAlert = new UIAlertView ("Fetching Icons...", "", null, null, null);
mAlert.Show ();
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = true;
Task.Run (() => {
foreach (var anApp in mDatasource.Apps)
{
byte[] data = null;
using (var c = new GzipWebClient ())
{
data = c.DownloadData (anApp.ImageUrl);
}
anApp.Image = UIImage.LoadFromData (NSData.FromArray (data));
}
}).ContinueWith (prevTask => {
mAlert.DismissWithClickedButtonIndex (0, true);
UIApplication.SharedApplication.NetworkActivityIndicatorVisible = false;
GridView.ReloadData ();
}, CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, TaskScheduler.FromCurrentSynchronizationContext ());
}
catch
{
DisplayError ("Warning", "Malformed Xml was found in the Rss Feed.");
}
}
});
}
