private async void OnRefreshRequested(object sender, RefreshRequestedEventArgs args)
{
using (args.GetDeferral())
{
await Task.Delay(2000);
_list.Insert(0, Contact.GetContactsGrouped(1)[0]);
}
}
private async Task StartLoadingAnimationAndRequestRefreshAsync(Action completed)
{
// Create a short delay to allow the expression rotation animation to smoothly transition
// to the new keyframe animation.
await Task.Delay(100);
_refreshIconVisual.StartAnimation("RotationAngleInDegrees", _loadingAnimation);
// When using the event...
if (RefreshRequested != null)
{
var e = new RefreshRequestedEventArgs(new DeferralCompletedHandler(completed));
RefreshRequested.Invoke(this, e);
}
// When using the command...
if (RefreshCommand != null)
{
try
{
_cts?.Cancel();
_cts = new CancellationTokenSource();
_pendingRefreshTask = DoCancellableRefreshTaskAsync(_cts.Token);
await _pendingRefreshTask;
}
catch (OperationCanceledException)
{
}
if (_cts != null && !_cts.IsCancellationRequested)
{
completed();
}
}
}
