private async void GoToNextPage(object sender, ExecuteEventArgs args)
{
int index = this.group.Items.IndexOf(this.viewmodel) + 1;
this.viewmodel = this.group.Items[index] as ArticleDataItem;
await this.InvokeAndNotifyOnError(this.viewmodel.OnSelectedAsync(this, this.progress));
NotifyAppBarCommands();
}
protected override async Task<IWebViewModel<string>> CreateWebViewModelAsync(NavigationEventArgs e)
{
ArticleDataItem selected = null;
if (NavigationContext.QueryString.ContainsKey("id"))
{
if (mainDataModel.Articles.Items.Count == 0)
await mainDataModel.Articles.OnSelectedAsync(this, this.progress);
selected = mainDataModel.GetArticleDataByID(NavigationContext.QueryString["id"]);
this.viewmodel = selected;
this.group = this.viewmodel.Group as ArticleDataGroup;
}
return selected;
}
