public static IList<Animal> Monkeys { get; private set; }

        static MonkeyData()
        {
            Monkeys = new List<Animal>();

            Monkeys.Add(new Animal
            {
                Name = "Baboon",
                Location = "Africa & Asia",
                Details = "Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae.",
                ImageUrl = "https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Papio_anubis_%28Serengeti%2C_2009%29.jpg/200px-Papio_anubis_%28Serengeti%2C_2009%29.jpg"
            });

            Monkeys.Add(new Animal
            {
                Name = "Capuchin Monkey",
                Location = "Central & South America",
                Details = "The capuchin monkeys are New World monkeys of the subfamily Cebinae. Prior to 2011, the subfamily contained only a single genus, Cebus.",
                ImageUrl = " https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/Capuchin_Costa_Rica.jpg/200px-Capuchin_Costa_Rica.jpg"
            });
}}

    public class MonkeySearchHandler : SearchHandler
    {
        protected override void OnQueryChanged(string oldValue, string newValue)
        {
            base.OnQueryChanged(oldValue, newValue);

            if (string.IsNullOrWhiteSpace(newValue))
            {
                ItemsSource = null;
            }
            else
            {
                ItemsSource = MonkeyData.Monkeys
                    .Where(monkey => monkey.Name.ToLower().Contains(newValue.ToLower()))
                    .ToList<Animal>();
            }
        }

        protected override async void OnItemSelected(object item)
        {
            base.OnItemSelected(item);
            await Task.Delay(1000);
           await Shell.Current.GoToAsync($"monkeydetails?name={((Animal)item).Name}");        }
    }

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage mc:Ignorable="d"
             x:Class="Latihan1.Bab4.ContohSearch"
             xmlns:controls="clr-namespace:Latihan1.Controls"
             xmlns:data="clr-namespace:Latihan1.Data"
             Title="Monkey">
    <Shell.SearchHandler>
        <controls:MonkeySearchHandler Placeholder="Enter search term"
                                      ShowsResults="true"
                                      DisplayMemberName="Name" />
    </Shell.SearchHandler>
    <CollectionView Margin="20"
                    ItemsSource="{x:Static data:MonkeyData.Monkeys}"
                    ItemTemplate="{StaticResource AnimalTemplate}"
                    SelectionMode="Single"
                    SelectionChanged="OnCollectionViewSelectionChanged" />
</ContentPage>

        async void OnCollectionViewSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            try
            {
                string monkeyName = (e.CurrentSelection.FirstOrDefault() as Animal).Name;
                await Shell.Current.GoToAsync($"monkeydetails?name={monkeyName}");
            }
            catch (Exception ex)
            {

                await DisplayAlert("Error", $"{ex.InnerException.Message}","OK");
            }
            
        }

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage 
             x:Class="Latihan1.Bab4.DetailSearch" Title="Monkey Detail">
    <ScrollView>
        <StackLayout Margin="20">
            <Label Text="{Binding Name}" 
                   HorizontalOptions="Center" />
            <Label Text="{Binding Location}" 
                   FontAttributes="Italic" 
                   HorizontalOptions="Center" />
            <Image Source="{Binding ImageUrl}" 
                   HeightRequest="200" 
                   WidthRequest="200" 
                   HorizontalOptions="CenterAndExpand" />
            <Label Text="{Binding Details}"/>
        </StackLayout>
    </ScrollView>
</ContentPage>

    [QueryProperty("MonkeyName", "name")]
    public class MonkeyDetailViewModel : INotifyPropertyChanged
    {
        public string MonkeyName
        {
            set
            {
                Animal monkey = MonkeyData.Monkeys.FirstOrDefault(m => m.Name == Uri.UnescapeDataString(value));

                if (monkey != null)
                {
                    Name = monkey.Name;
                    Location = monkey.Location;
                    Details = monkey.Details;
                    ImageUrl = monkey.ImageUrl;
                    OnPropertyChanged("Name");
                    OnPropertyChanged("Location");
                    OnPropertyChanged("Details");
                    OnPropertyChanged("ImageUrl");
                }
            }
        }

        public string Name { get; set; }
        public string Location { get; private set; }
        public string Details { get; private set; }
        public string ImageUrl { get; private set; }

        #region INotifyPropertyChanged

        public event PropertyChangedEventHandler PropertyChanged;

        void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        #endregion
    }

   Routing.RegisterRoute("monkeylist", typeof(ContohSearch));
   Routing.RegisterRoute("monkeydetails", typeof(DetailSearch));