/// <summary>
/// 最新のまとめ記事より前のまとめ記事を読み込みます。
/// </summary>
/// <returns>非同期操作を示す <see cref="System.Threading.Tasks.Task"/>。</returns>
public Task LoadPreviousAsync()
{
this.Dispatcher.BeginInvoke(() => this.RaiseAsyncStarted());
var repository = new MatomeEntryRepository();
var max = this.Items.LastOrDefault();
return(repository.GetAsync(maxId: max == null ? (Guid?)null : max.EntryId)
.ContinueWith(
task => this.Dispatcher.BeginInvoke(
parameter => {
if (parameter != null)
{
this.Items.AddRangeIf(parameter.OrderByDescending(x => x.CreatedAt), x => x.CreatedAt);
this.RaiseAsyncCompleted();
}
else
{
this.RaiseAsyncError(null);
}
},
task.Result),
TaskContinuationOptions.OnlyOnRanToCompletion)
.ContinueWith(
task => this.Dispatcher.BeginInvoke(() => this.RaiseAsyncError(task.Exception)),
TaskContinuationOptions.NotOnRanToCompletion));
}
/// <summary>
/// 最新のまとめ記事を読み込みます。
/// </summary>
/// <returns>非同期操作を示す <see cref="System.Threading.Tasks.Task"/>。</returns>
public Task LoadLatestAsync()
{
this.Dispatcher.BeginInvoke(() => this.RaiseAsyncStarted());
var repository = new MatomeEntryRepository();
return(repository.GetAsync()
.ContinueWith(
task => this.Dispatcher.BeginInvoke(
parameter => {
if (parameter != null)
{
this.Items.InsertRangeIf(0, parameter.OrderByDescending(x => x.CreatedAt), x => x.CreatedAt);
this.RaiseAsyncCompleted();
}
else
{
this.RaiseAsyncError(null);
}
},
task.Result),
TaskContinuationOptions.OnlyOnRanToCompletion)
.ContinueWith(
task => this.Dispatcher.BeginInvoke(() => this.RaiseAsyncError(task.Exception)),
TaskContinuationOptions.NotOnRanToCompletion));
}
