public async Task Load() { UpdateInProgress = true; PageTitle = "Lade " + NavigationParameter.DokumentTitel; bool loadingSucceeded = false; if (NavigationParameter.Action == NavigationAction.LoadFromService) { string dokumentNummer = NavigationParameter.Command; var result = await Task.Run(() => ParallelLoadSynced(dokumentNummer)); if (null != result) { CurrentDocument = result.Item1; SourceHtml = result.Item2; loadingSucceeded = true; } } else if (NavigationParameter.Action == NavigationAction.LoadCachedDownload) { loadingSucceeded = await LoadFromCacheAsync(); } if (!loadingSucceeded) { PageTitle = "Fehler: Laden fehlgeschlagen"; CurrentDocument = null; Attachments = null; SourceHtml = null; } else { PageTitle = CreateTitleFromDocument(); Attachments = CurrentDocument.GetAttachments(); } RaisePropertyChanged(CanAddDownloadPropertyName); UpdateInProgress = false; }