private async Task <List <GroupBookList <object> > > GetBookSearchResult(string searchTerm)
{
try
{
BookList instanceBooks = new BookList();
List <GroupBookList <object> > BookGroups = new List <GroupBookList <object> >();
ObservableCollection <Books> bookList = await instanceBooks.GetBookLists();
var query = from book in bookList
where ((Books)book).title.ToLower().Contains(searchTerm.ToLower())
orderby((Books)book).title
group book by((Books)book).category__name into books
select new { GroupName = books.Key, Items = books, Number = books.Count() };
foreach (var books in query)
{
GroupBookList <object> info = new GroupBookList <object>();
info.Group = books.GroupName;
info.ItemsNumber = books.Number;
foreach (var book in books.Items)
{
info.Add(book);
}
BookGroups.Add(info);
}
return(BookGroups);
}
catch (TaskCanceledException ex)
{
return(null);
}
}
protected async override void OnNavigatedTo(NavigationEventArgs args)
{
BookList instanceBooks = new BookList();
ObservableCollection <Books> bookList = await instanceBooks.GetBookLists();
var queryText = args.Parameter.ToString().ToLower() as String;
var requestedBooks = await GetBookSearchResult(queryText);
if (requestedBooks != null)
{
int countBooks = requestedBooks.Count;
var totalItems = 0;
var searchFilters = new List <Filter>();
SearchResult = new Dictionary <string, IEnumerable <Books> >();
if (countBooks > 0)
{
foreach (var groups in requestedBooks)
{
IEnumerable <Books> matchItems = bookList.Where(book => book.title.ToLower().Contains(queryText) && book.category__name == (string)groups.Group);
int itemsNumber = matchItems.Count <Books>();
totalItems = totalItems + itemsNumber;
}
searchFilters.Add(new Filter("All", totalItems, true));
foreach (var groups in requestedBooks)
{
IEnumerable <Books> matchItems = bookList.Where(book => book.title.ToLower().Contains(queryText) && book.category__name == (string)groups.Group);
int itemsNumber = matchItems.Count <Books>();
if (itemsNumber > 0)
{
SearchResult.Add(groups.Group.ToString(), matchItems);
searchFilters.Add(new Filter(groups.Group.ToString(), itemsNumber, false));
totalItems = totalItems + itemsNumber;
}
}
}
else
{
VisualStateManager.GoToState(this, "NoResultsFound", true);
}
this.DefaultViewModel["QueryText"] = '\u201c' + queryText + '\u201d';
this.DefaultViewModel["Filters"] = searchFilters;
this.DefaultViewModel["ShowFilters"] = searchFilters.Count > 1;
}
else
{
var popup = new Windows.UI.Popups.MessageDialog("Couldnt fetch books. Plaease check your internet connection.");
popup.Commands.Add(new Windows.UI.Popups.UICommand("Try Again"));
popup.Commands.Add(new Windows.UI.Popups.UICommand("Cancel"));
popup.DefaultCommandIndex = 0;
popup.CancelCommandIndex = 1;
var results = await popup.ShowAsync();
if (results.Label == "Try Again")
{
OnNavigatedTo(args);
}
else
{
this.Frame.GoBack();
}
}
}