private async Task DoLoadNextChunkAsync(object param)
{
if (InProgress)
{
return;
}
InProgress = true;
var dispatcher = Windows.UI.Xaml.Window.Current.Dispatcher;
ThreadPool.RunAsync(async(a) =>
{
var posts = await _repositoryService.GetPostsAsync(_displayedPosts, DOWNLOAD_CHUNK_SIZE, true);
dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
if (Posts.Last() is LoadNextListItemViewModel)
{
var last = Posts.Last(x => x is LoadNextListItemViewModel);
if (last != null)
{
Posts.Remove(last);
}
}
if (posts != null)
{
foreach (var post in posts)
{
PostItemViewModel vm = null;
vm = PostItemVMFactory.CreateViewModel(post);
if (vm != null)
{
Posts.Add(vm);
}
}
_displayedPosts += posts.Count;
if (_displayedPosts < _repositoryService.TotalNumberOfPosts)
{
Posts.Add(new LoadNextListItemViewModel(_resourceLoader.GetString("DownloadingPosts"), this));
}
}
InProgress = false;
UpdateBindedProperties();
});
});
}
private async Task LoadPosts(int start, int number)
{
var posts = await _repositoryService.GetPostsAsync(start, number, true);
if (posts != null)
{
foreach (var post in posts)
{
PostItemViewModel vm = null;
vm = PostItemVMFactory.CreateViewModel(post);
if (vm != null)
{
Posts.Add(vm);
}
}
_displayedPosts = posts.Count;
if (_displayedPosts < _repositoryService.TotalNumberOfPosts)
{
Posts.Add(new LoadNextListItemViewModel(_resourceLoader.GetString("DownloadingPosts"), this));
}
UpdateBindedProperties();
}
}