ListView not triggering ItemTapped - xaml

Question

I've been working on a school assignment, where you need to load data into a ListView. According to the course manual, you need to use 'ObservableCollection' which I figured out. However, I can't seem to get the ItemTapped to work.
I'm creating the following table using SQLite.
public class Settings
{
[Primarykey]
public string Name { get; set; }
[MaxLength(255)]
public string Value { get; set; }
}
Then on the OnAppearing I initialise the database and add a row of data.
public partial class SQL : ContentPage
{
private SQLiteAsyncConnection _connection;
private ObservableCollection<Settings> _settings;
public SQL()
{
InitializeComponent();
_connection = DependencyService.Get<ISQLiteDb>().GetConnection();
}
protected override async void OnAppearing()
{
await _connection.CreateTableAsync<Settings>();
var settings_name = new Settings { Name = "Meaning of Life", Value = "42" };
await _connection.InsertAsync(settings_name);
await DisplayAlert("Alert", "Value Added to database!", "OK");
var settings = await _connection.Table<Settings>().ToListAsync();
_settings = new ObservableCollection<Settings>(settings);
ListView.ItemsSource = _settings;
base.OnAppearing();
}
void MyItemTapped (object sender, System.EventArgs e)
{
DisplayAlert("Alert", "You Pressed Something!", "OK");
}
void MyItemSelected (object sender, System.EventArgs e)
{
DisplayAlert("Alert", "You Selected Something!", "OK");
}
}
In my XAML file, I have the following, with the ItemTapped going to the function above.
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="BudgetBuddy.SQL">
<ContentPage.Content>
<ListView x:Name="ListView">
<ListView.ItemTemplate ItemTapped="MyItemTapped" ItemSelected="MyItemSelected">
<DataTemplate>
<TextCell Text="{Binding Name}"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ContentPage.Content>
</ContentPage>
I can't figure out what I'm doing wrong. Why doesn't my ItemTapped and ItemSelected work? Also, what would be the best way to access the Value associated with the Name I pressed in the ListView from the ObservableCollection

Answer 1

The reason your ItemTapped and ItemSelected aren't working is because they are in the wrong location.
This is what you have:
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="BudgetBuddy.SQL">
<ContentPage.Content>
<ListView x:Name="ListView">
<ListView.ItemTemplate ItemTapped="MyItemTapped" ItemSelected="MyItemSelected">
<DataTemplate>
<TextCell Text="{Binding Name}"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ContentPage.Content>
</ContentPage>
This is what you should do:
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="BudgetBuddy.SQL">
<ContentPage.Content>
<ListView x:Name="ListView" ItemTapped="MyItemTapped" ItemSelected="MyItemSelected">
<ListView.ItemTemplate >
<DataTemplate>
<TextCell Text="{Binding Name}"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ContentPage.Content>
</ContentPage>