在 ListView 上选择的项目以及有关 object 的更多信息（Xamarin.Forms、C #）

Question

I have a problem. In my xamarin.forms application I have a listview that gets as a source:

var tr = JsonConvert.DeserializeObject<Items>(content);
myList.ItemsSource = tr.cars;

Classes for this data:

public class Items
{
    public List<Car> cars { get; set; }
}
public class Car
{
    public int id { get; set; }
    public string company { get; set; }
    public Owner owners { get; set; }
}
public class Owner
{
    public int o_id { get; set; }
    public string o_surname { get; set; }
}

I would like to view more information by clicking on an object in the listview. I use this in xaml ItemSelected="OnSelection" and in code:

void OnSelection(object sender, ItemTappedEventArgs e)
        {
        Car myitem = sender as Car;
        DisplayAlert("ItemSelected", $"{myitem.company.ToString()}", "Ok");
        }

This give me error: Object reference not set to an instance of an object.'

I found some information about item selected, but none solved my problem.

Answer 1

ItemTappedEventArgs contains a reference to your item

void OnSelection(object sender, ItemTappedEventArgs e)
{
    Car myitem = e.Item as Car;
    DisplayAlert("ItemSelected", $"{myitem.company.ToString()}", "Ok");
}

Answer 2

Another way to get the item via sender for your reference.

Change:

Car myitem = sender as Car;

To:

Car myitem = (Car)((ListView)sender).SelectedItem;

Result: